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nanost 2008-04-20 13:12

Advanced Materials－Volume 20 Issue 7 , Pages 1233 - 1388 (April 4, 2008)

Communications
[b]Protein In-Mold Patterning (p NA)[/b]
Susan B. N. Biancardo, Henrik J. Pranov, Niels B. Larsen
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702859

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[b]Nano-and microscopic patterns of active proteins may be built into the surface of polymers[/b] during injection molding of hot polymer melts. The retained biofunction is likely due to extremely fast (nanoseconds) cooling rates within nanometers of the cold mold/hot melt interface.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678174/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678174/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118678174/PDFSTART]PDF[/url] (Size: 255K)
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[b]A General Route to Nonspherical Anatase TiO[size=-1]2[/size] Hollow Colloids and Magnetic Multifunctional Particles (p NA)[/b]
Xiong Wen Lou, Lynden A. Archer
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702379

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[b]A general scheme for the preparation of non-spherical anatase TiO2 hollow particles[/b] and derived magnetic multifunctional particles by converting hematite cores to magnetite phase is reported (see figure). The TiO2 hollow particles manifest excellent cycling performance and rate capability, confirming their promising application as anode materials for high power lithium batteries.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678161/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678161/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118678161/PDFSTART]PDF[/url] (Size: 230K)
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[b]Self-Assembled Monolayers of a Malachite Green Derivative: Surfaces with pH- and UV-Responsive Wetting Properties (p NA)[/b]
Yugui Jiang, Pengbo Wan, Mario Smet, Zhiqiang Wang, Xi Zhang
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702366

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[b]Surfaces that respond to pH and UV stimuli[/b] are fabricated from self-assembled monolayers (SAMs) of a malachite green derivative on a rough surface (see figure). The wetting properties of the SAMs exhibit an uncommon response to pH and UV illumination, and range from superhydrophobicity to superhydrophilicity.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678172/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678172/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118678172/PDFSTART]PDF[/url] (Size: 154K)
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[b]Design of Hole Blocking Layer with Electron Transport Channels for High Performance Polymer Light-Emitting Diodes (p NA)[/b]
Chung-Chin Hsiao, An-En Hsiao, Show-An Chen
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702150

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[b]A novel dual-functional composite layer[/b] composed of a high ionization potential nonconjugated polymer or conjugated molecular material and an inorganic salt of a low work function metal is demonstrated. The composite provides superior hole blocking along with promising electron transport capability and results in good device performance for two model electroluminescent polymers, PFO and MEH-PPV.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678171/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678171/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118678171/PDFSTART]PDF[/url] (Size: 304K)
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[b]Hydrothermal Synthesis and Thermoelectric Transport Properties of Impurity-Free Antimony Telluride Hexagonal Nanoplates (p NA)[/b]
Weidong Shi, Liang Zhou, Shuyan Song, Jianhui Yang, Hongjie Zhang
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702003

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[b]Impurity-free single-crystalline antimony telluride hexagonal nanoplates[/b] (see figure) are synthesized by a facile and quick hydrothermal treatment without any organic additives or templates. The inherent crystal structure is the driving force for the growth of these Sb2Te3 hexagonal nanoplates. Films of these nanoplates shows p-type behavior, and exhibit a promisingly high Seebeck coefficient of 125 µV K-1 at room temperature.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678168/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678168/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118678168/PDFSTART]PDF[/url] (Size: 272K)
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[b]Stacking of Organic Thin Film Transistors: Vertical Integration (p NA)[/b]
Soon-Min Seo, Changhoon Baek, Hong H. Lee
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200701770

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[b]Three-dimensional integration in the vertical direction is attractive for organic thin film[/b] transistors (OTFTs) and circuits based on OTFTs simply because the device fabrication involves forming layers in the vertical direction. For the vertical stacking of the devices, however, any device in the stacked configuration has to be isolated from the ones above and below the device. We developed approaches that can resolve the problems for the vertical stacking of organic thin film transistors.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678176/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118678176/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118678176/PDFSTART]PDF[/url] (Size: 144K)
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[b]Embedding Organic Light-Emitting Diodes into Channel Waveguide Structures (p NA)[/b]
Malte C. Gather, Fabian Ventsch, Klaus Meerholz
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702837

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[b]Combining optical waveguides and organic light-emitting diodes[/b] (OLEDs) is a key requirement for optical sensors based on organic materials. A device architecture in which the active layers of the OLED also form the waveguide structure is demonstrated (see figure), and it is shown that the choice of materials with adequate optical an electrical properties is crucial to obtain low-loss waveguides.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677688/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677688/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118677688/PDFSTART]PDF[/url] (Size: 232K)
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[b]Electron Tomography Imaging and Analysis of [i]
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[/i]
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and [i]
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[/i] Domains in Ni-based Superalloys (p NA)[/b]
Satoshi Hata, Kosuke Kimura, Hongye Gao, Syo Matsumura, Minoru Doi, Tomokazu Moritani, Jonathan S. Barnard, Jenna R. Tong, Jo H. Sharp, Paul A. Midgley
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702461

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[b]Advanced electron tomography[/b] enables the visualization of 3D domain structures in crystalline materials (see figure) In this study, the morphology and composition of
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([i]L[/i]12-ordered) and [i]
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[/i] ([i]A[/i]1-disordered) domains formed in Ni-based Ni
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Al
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Ti superalloys are investigated by tomographic dark-field and energy-filtered transmission electronmicroscopy.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677694/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677694/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118677694/PDFSTART]PDF[/url] (Size: 224K)
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[b]Efficient, Color Stable White Organic Light-Emitting Diode Based on High Energy Level Yellowish-Green Dopants (p NA)[/b]
Young-Seo Park, Jae-Wook Kang, Dong Min Kang, Jong-Won Park, Yoon-Hi Kim, Soon-Ki Kwon, Jang-Joo Kim
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702435

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[b]White OLEDs with high efficiency and high color stability are developed[/b] by using high energy level dopants. The white OLEDs showed high external quantum efficiency of 11.7% and remarkable color stability with the variation of CIE chromaticity coordinates less than (0.02, 0.01) between 10 cd m-2 and 5000 cd m-2. Moreover roll-off of efficiency was low and the CRI value was over 87.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677693/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677693/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118677693/PDFSTART]PDF[/url] (Size: 155K)
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[b]Platinum Catalyst Nanoparticles from Directed Deposition in Functional Block Copolymers (p NA)[/b]
Sundar Mayavan, Namita Roy Choudhury, Naba Kumar Dutta
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200702069

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[b]An insight into the utilization of solvent driven morphology[/b] of functional block copolymers as nanoreactors for forming and stabilizing catalytic nanoparticles is presented. Highly dispersed nanoparticles would have great impact on the catalyst utilization if integrated within proton conducting network, which is hard to realize with existing approaches.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677692/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677692/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118677692/PDFSTART]PDF[/url] (Size: 315K)
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[b]Synthesis and Characterization of Organic-Inorganic Hybrid GeO[size=-1][i]x[/i][/size]/Ethylenediamine Nanowires (p NA)[/b]
Qingsheng Gao, Ping Chen, Yahong Zhang, Yi Tang
Published Online: Apr 17 2008 8:30AM
DOI: 10.1002/adma.200701646

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[b]Organic-inorganic hybrid GeO[i]x[/i]/ethylenediamine (EDA) nanowires[/b] are fabricated via a Fe2O3-assisted hydrothermal method. EDA connects the inorganic units through (N-H
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O-Ge) H-bonding to form a sub-nanometer periodic structure in the nanowires. This structure exhibits an obvious quantum confinement effect and thereby a blue-shift in the UV/vis spectrum. A Fe2O3-assisted growth mechanism is proposed, in which (N-H
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O-Ge) H-bonding induces anisotropic growth of the nanowires.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677691/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118677691/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118677691/PDFSTART]PDF[/url] (Size: 380K)
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[b]Integrated Direct DNA/Protein Patterning and Microfabrication by Focused Ion Beam Milling (p NA)[/b]
Jie Jiang, Xiaomin Li, Wing Cheung Mak, Dieter Trau
Published Online: Apr 17 2008 1:51AM
DOI: 10.1002/adma.200701415

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[b]Single and binary component patterning and integrated microfabrication of biomolecules[/b], such as DNA and proteins, can be achieved by focused ion-beam (FIB) biolithography. Well-defined micropatterns are obtained by FIB milling on biomolecules immobilized on SiO2 wafers and protected by a thin Au film. The retention of biofunctionality is excellent (68-90%) and a feature size of down to 500 nm can be achieved for the patterns without significant loss of functionality.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118639591/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118639591/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118639591/PDFSTART]PDF[/url] (Size: 416K)
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[b]Structural Evolution of Superconductor Nanowires in Biopolymer Gels (p NA)[/b]
Zoe A. C. Schnepp, Stuart C. Wimbush, Stephen Mann, Simon R. Hall
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702679

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[b]A simple synthesis of superconductor nanowires[/b] (see figure) is carried out by rational design of the synthetic protocol. This technique is based on the selection of a component (in this case BaCO3) that remains invariant throughout the synthesis. A biopolymer matrix ensures antisintering of BaCO3 nanoparticles, leading to single-crystal outgrowth of the superconductor in this most technologically useful of morphologies.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118636437/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118636437/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118636437/PDFSTART]PDF[/url] (Size: 228K)
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[b]Nanowire Waveguides and Ultraviolet Lasers Based on Small Organic Molecules (p NA)[/b]
Yong Sheng Zhao, Aidong Peng, Hongbing Fu, Ying Ma, Jiannian Yao
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200800123

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[b]Single crystalline nanowires[/b] of 2,4,5-triphenylimidazole, a small organic functional compound, are prepared by adsorbent-assisted physical vapor deposition. As-prepared nanowires are shown to propagate multimode UV light and serve as single wire active optical waveguides and optically driven ultraviolet lasers (see figure).

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[b]Facile One-Step Growth and Patterning of Aligned Squaraine Nanowires via Evaporation-Induced Self-Assembly (p NA)[/b]
Chengyi Zhang, Xiujuan Zhang, Xiaohong Zhang, Xia Fan, Jiansheng Jie, Jack C. Chang, Chun-Sing Lee, Wenjun Zhang, Shuit-Tong Lee
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200703142

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[b]Single-crystal squaraine dye nanowires[/b] are prepared on solid substrates by solvent evaporation. The nanowires can self-assemble into aligned arrays and patterns on substrates in parallel stripes. This simple one-step method for growth and patterning of aligned organic nanostructures would facilitate easy and low-cost fabrication of organic devices with one-dimensional nanostructures, especially for the fabrication of parallel arrays of devices.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635541/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635541/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635541/PDFSTART]PDF[/url] (Size: 258K)
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[b]Optofluidic Assembly of Colloidal Photonic Crystals with Controlled Sizes, Shapes, and Structures (p NA)[/b]
Shin-Hyun Kim, Seog-Jin Jeon, Gi-Ra Yi, Chul-Joon Heo, Jae Hoon Choi, Seung-Man Yang
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200703022

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[b]Various structural motifs of colloidal crystals[/b] are prepared by UV-induced consolidation over fast time scales. Our strategy with a high-throughput optofluidic technique allows unprecedented control over the 3D organization of the colloids, as well as the combination of different materials over multiple length scales, thus expanding the potential for specific applications such as e-papers and light emission modulators.

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[b]Universal Block Copolymer Lithography for Metals, Semiconductors, Ceramics, and Polymers (p NA)[/b]
Seong-Jun Jeong, Guodong Xia, Bong Hoon Kim, Dong Ok Shin, Se-Hun Kwon, Sang-Won Kang, Sang Ouk Kim
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702930

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[b]A universal block copolymer lithography[/b] is developed for a broad spectrum of materials including metals, semiconductors, ceramics, and polymers by combining advanced film deposition techniques with block copolymer lithography. The figure presents a nanopatterned platinum film prepared by applying universal block copolymer lithography.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635546/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635546/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635546/PDFSTART]PDF[/url] (Size: 378K)
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[b]Multiwalled HgX (X = S, Se, Te) Nanotubes Formed with a Mercury Iodide Catalyst in Nanocrystalline Thin Films Spray-Deposited at Low Temperature (p NA)[/b]
Arnepalli Ranga Rao, Viresh Dutta, Vidyanand N. Singh
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702852

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[b]X (HgX = S, Se,Te) nanotube formation[/b] by low-temperature spray deposition of solvothermally synthesized HgX nanoparticles is demonstrated. HgI2 is found to act as a catalyst for HgX nanotube growth; the mechanism being similar to that of the catalytic tip growth mechanism of carbon nanotubes. The figure shows the obtained bamboo-shaped HgS nanotubes with hexagonal crystal structure and HgSe and HgTe nanotubes with cubic crystal structure (from left to right).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635545/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635545/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635545/PDFSTART]PDF[/url] (Size: 438K)
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[b]Carbon-Inorganic Hybrid Materials: The Carbon-Nanotube/TiO[size=-1]2[/size] Interface (p NA)[/b]
Dominik Eder, Alan H. Windle
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702835

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[b]A nondestructive, simple process[/b] for the synthesis of CNT-TiO2 and various other hybrid materials, using benzyl alcohol as surfactant (see figure), is described. [i]
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[/i]-[i]
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[/i] interactions enable the use of pristine CNTs without the need of covalent functionalization. Furthermore, benzyl alcohol acts as a growth inhibitor to produce very small and uniform rutile nanocrystals without too great a reduction of the anatase to rutile transformation.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635543/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635543/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635543/PDFSTART]PDF[/url] (Size: 301K)
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[b]Precursor-Controlled Formation of Novel Carbon/Metal and Carbon/Metal Oxide Nanocomposites (p NA)[/b]
Linjie Zhi, Yong-Sheng Hu, Bassem El Hamaoui, Xuan Wang, Ingo Lieberwirth, Ute Kolb, Joachim Maier, Klaus Müllen
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702654

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[b]Precursor-controlled thermolysis has been developed to specifically prepare structured carbonaceous materials[/b] (see figure) by using simple, but structurally defined, organic-cobalt complexes as starting compounds. The carbon-metal nanocomposites show excellent lithium storage properties as an anode material in lithium-ion batteries after controllable oxidation. They may also be useful as catalysts for fuel cells and other heterocatalytic reactions and as sensors for detecting chemicals and biomaterials.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635550/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635550/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635550/PDFSTART]PDF[/url] (Size: 416K)
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[b]Transparent Nanocomposites Based on Cellulose Produced by Bacteria Offer Potential Innovation in the Electronics Device Industry (p NA)[/b]
Masaya Nogi, Hiroyuki Yano
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702559

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[b]Bacterial cellulose (BC) pellicles[/b] consist of a layered structure of planar nanofiber networks, which enables the production of optically transparent composites with an ultralow coefficient of thermal expansion comparable to that of silicon crystal. The BC nanofiber networks suppress crack propagation in the brittle matrix resin, resulting in composites that can be bent without damage (see figure).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635544/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635544/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635544/PDFSTART]PDF[/url] (Size: 168K)
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[b]Two-Photon Absorption and Lasing in First-Generation Bisfluorene Dendrimers (p NA)[/b]
Georgios Tsiminis, Jean-Charles Ribierre, Arvydas Ruseckas, Homar S. Barcena, Garry J. Richards, Graham A. Turnbull, Paul L. Burn, Ifor D. W. Samuel
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702498

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[b]The two-photon absorption properties of bisfluorene dendrimers[/b] are investigated in both the nanosecond and the femtosecond regime. By substituting different dendrons onto the same chromophore (see figure), we examine the effect of the dendrons on the spectrum and magnitude of the two-photon absorption. As these dendrimers have high photoluminescence quantum yields, we then proceed to make two-photon pumped dendrimer lasers.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635549/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635549/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635549/PDFSTART]PDF[/url] (Size: 136K)
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[b]Integrated Catalytic Activity of Patterned Multilayer Films Based on pH-Induced Electrostatic Properties of Enzymes (p NA)[/b]
Jeongju Park, Inpyo Kim, Hyunjung Shin, Min Jung Lee, Youn Sang Kim, Joona Bang, Frank Caruso, Jinhan Cho
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702407

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[b]Patterned multilayer structures are fabricated on enzymatic surfaces[/b] using pH-induced variations in the electrostatic properties of these surfaces, as schematically illustrated in the figure. Notably, this process does not require photolithography or the use of hydrophobic components that could lead to a loss of enzymatic activity. Highly effective electrochemical sensors incorporating metal nanoparticles and biocatalysts are fabricated using this approach.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635548/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635548/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635548/PDFSTART]PDF[/url] (Size: 310K)
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[b]Size-Controlled [i]Ex-nihilo[/i] Ferromagnetism in Capped CdSe Quantum Dots (p NA)[/b]
Mohindar S. Seehra, Prasanta Dutta, Sonnathi Neeleshwar, Yang-Yuan Chen, Cheng Lung Chen, Shang Wei Chou, Chia Chun Chen, Chung-Li Dong, Ching-Lin Chang
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702382

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[b]Hysteresis loops in [i]D[/i] = 1.8 nm CdSe-TOPO nanoparticles show ferromagnetism[/b] at 5 K and 300 K. Charge transfer from Cd to the Cd-O bond is shown by arrow in the Fourier transforms amplitudes of the EXAFS [i]k[/i]2[i]
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[/i] data at the Cd K-edge in the smaller 2.8 and 4.1 nm particles. This charge transfer produces holes in the Cd 4d band yielding ferromagnetism varying as 1/[i]D[/i] with magnetic moment µ = 0.0075 µB per Cd surface atom.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635547/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635547/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635547/PDFSTART]PDF[/url] (Size: 216K)
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[b]Length Fractionation of Carbon Nanotubes Using Centrifugation (p NA)[/b]
Jeffrey A. Fagan, Matthew L. Becker, Jaehun Chun, Erik K. Hobbie
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702353

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[b]Scalable separation of single-walled carbon nanotubes[/b] (SWCNTs)by length and chirality is critical to the adaptation of these materials for applications. Ultracentrifugation of SWCNTs within a density gradient produces chiral separation of the NTs, and it is shown here that ultracentrifugation can also be used to produce length fractionated SWCNTs by exploiting their transient motion in response to applied centripetal acceleration.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635551/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635551/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635551/PDFSTART]PDF[/url] (Size: 238K)
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[b]Polymer Transfer Printing: Application to Layer Coating, Pattern Definition, and Diode Dark Current Blocking (p NA)[/b]
Lichun Chen, Patrick Degenaar, Donal D. C. Bradley
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702304

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[b]Fabrication of polymer multilayer structures[/b] has previously been difficult to achieve due to the need for solvent orthogonality to ensure that sequential deposition does not damage any underlying layers. In this paper we report an alternative approach based on a stamp transfer printing process. We demonstrate its suitability for uniform and patterned multilayer deposition (c.f. figure) and use it as a means to engineer enhanced performance photodiode structures.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635558/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635558/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635558/PDFSTART]PDF[/url] (Size: 219K)
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[b]Water-Soluble Polyfluorenes as an Electron Injecting Layer in PLEDs for Extremely High Quantum Efficiency (p NA)[/b]
Seung-Hwan Oh, Doojin Vak, Seok-In Na, Tae-Woo Lee, Dong-Yu Kim
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702229

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[b]A cationic water-soluble polyfluorene[/b] containing ion-transporting side groups and mobile metal ions is synthesized. The material is used as an electron injection layer in polymer light-emitting diodes with high-work-function Al cathodes. The devices show high quantum efficiencies (see figure), with a maximum external quantum efficiency of 4.8%, approaching the theoretical maximum external quantum efficiency of about 5%.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635564/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635564/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635564/PDFSTART]PDF[/url] (Size: 168K)
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[b]Synthesis and Single-Particle Optical Detection of Low-Polydispersity Plasmonic-Superparamagnetic Nanoparticles (p NA)[/b]
JitKang Lim, Alexander Eggeman, Frederick Lanni, Robert D. Tilton, Sara A. Majetich
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702196

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[b]The synthesis, magnetic characterization, and optical properties[/b] of nanoparticles with iron oxide cores and gold shells are presented. The nanoparticles are superparamagnetic at room temperature and can be reversibly collected by a permanent magnet. They display a localized surface plasmon resonance peak at 605 nm, and their large scattering cross-section allows them to be individually resolved in darkfield optical microscopy as they undergo Brownian motion in aqueous suspension.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635562/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635562/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635562/PDFSTART]PDF[/url] (Size: 211K)
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[b]High-Performance Programmable Memory Devices Based on Hyperbranched Copper Phthalocyanine Polymer Thin Films (p NA)[/b]
Seungchel Choi, Sang-Hyun Hong, Shin Hyo Cho, Samdae Park, Su-Moon Park, Ohyun Kim, Moonhor Ree
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702147

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[b]Electrically programmable fuse-type polymer memory devices[/b] based on hyperbranched copper phthalocyanine polymer thin films are fabricated. The devices have novel write-once-read-many (WORM) memory characteristics, with a high ON/OFF current ratio (of 106) and a high electrical stability, thus opening up the possibility of a low-cost mass production of high-performance, nonvolatile polymer memory devices.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635557/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635557/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635557/PDFSTART]PDF[/url] (Size: 180K)
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[b]Nanopatterned Self-Assembled Monolayers by Using Diblock Copolymer Micelles as Nanometer-Scale Adsorption and Etch Masks (p NA)[/b]
Sivashankar Krishnamoorthy, Raphael Pugin, Juergen Brugger, Harry Heinzelmann, Christian Hinderling
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200702005

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[b]Nanopatterned self-assembled monolayers (SAMs)[/b] are obtained from a simple, straight-forward procedure by using masks derived from monolayers of block copolymer micelles. The nanopatterned SAMs consist of regularly spaced circular hydrophilic areas with diameters of approximately 60 nm on a continous hydrobhopic background or vice versa. The surfaces are shown to be excellent tools for the preparation of arrays of nanocrystals.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635554/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635554/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635554/PDFSTART]PDF[/url] (Size: 157K)
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[b]Self-Sealing of Nanoporous Low Dielectric Constant Patterns Fabricated by Nanoimprint Lithography (p NA)[/b]
Hyun Wook Ro, Huagen Peng, Ken-ichi Niihara, Hae-Jeong Lee, Eric K. Lin, Alamgir Karim, David W. Gidley, Hiroshi Jinnai, Do Y. Yoon, Christopher L. Soles
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200701994

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[b]The cross-sectional TEM image shows that line-space patterns[/b] can be directly imprinted, with high fidelity, into highly porous spin-on organosilicate materials. This publication quantifies how the porosity and distribution of pores within the patterns are affected by the nanoimprint lithography processes, including evidence for a densified pattern surface.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635553/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635553/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635553/PDFSTART]PDF[/url] (Size: 280K)
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[b]When
[img]http://www3.interscience.wiley.com/giflibrary/12/ldquo.gif[/img]
Metal Atom Clusters
[img]http://www3.interscience.wiley.com/giflibrary/12/rdquo.gif[/img]
Meet ZnO Nanocrystals: A (([i]n[/i]-C[size=-1]4[/size]H[size=-1]9[/size])[size=-1]4[/size]N)[size=-1]2[/size]Mo[size=-1]6[/size]Br[size=-1]14[/size]@ZnO Hybrid (p NA)[/b]
Fabien Grasset, Yann Molard, Stéphane Cordier, Fréderick Dorson, Michel Mortier, Christiane Perrin, Maryline Guilloux-Viry, Toshio Sasaki, Hajime Haneda
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200701845

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[b]Preparation and characterization of a luminescent hybrid nanocomposite[/b], ( ([i]n[/i]-C4H9)4N)2Mo6Br14@ZnO, is achieved by using a straightforward fabrication process. The hybrid nanocomposite can be applied both under organosol and solid-state conditions. PL experiments show that the intrinsic photophysical properties of the cluster anion [Mo6Br[color=#999999][stack [/color]14[color=#999999] ][/color]]2- are not affected by its inclusion in the ZnO organosol. The obtained nanocomposite can be applied as a versatile luminescent nanomaterial with emissions ranging from 430 to 850 nm.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635560/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635560/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635560/PDFSTART]PDF[/url] (Size: 247K)
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[b]A Facile Synthetic Route for the Preparation of Superparamagnetic Iron Oxide Nanorods and Nanorices with Tunable Surface Functionality (p NA)[/b]
Aldo F. Rebolledo, Oscar Bomatí-Miguel, José F. Marco, Pedro Tartaj
Published Online: Apr 15 2008 6:23AM
DOI: 10.1002/adma.200701782

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[b]A simple procedure is used to prepare anisometric iron oxide nanoparticles[/b]exhibiting superparamagnetic behavior. The figure shows the nanorod/nanorice morphology of these novel structures. Superparamagnetism is engineered in these structures by favoring thermally activated processes by adopting small particle sizes, introducing defects, and doping with cations. Positively and negatively charged particles are obtained by varying the surface coating.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635559/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118635559/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118635559/PDFSTART]PDF[/url] (Size: 257K)
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[b]Encapsulation and Growth of Gold Nanoparticles in Thermoresponsive Microgels (p NA)[/b]
Rafael Contreras-Cáceres, Ana Sánchez-Iglesias, Matthias Karg, Isabel Pastoriza-Santos, Jorge Pérez-Juste, Jessica Pacifico, Thomas Hellweg, Antonio Fernández-Barbero, Luis M. Liz-Marzán
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200800064

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[b]Gold nanoparticles are encapsulatedwithin thermoresponsive pNIPAMmigrogels[/b] through an easy two-stepprotocol. The core/shell structure ofthe composite is characterized by TEM,AFM, PCS, and UV-vis spectroscopy. The restricted environment and thehigh porosity of the microgel shell arestudied through the overgrowth of thegold core.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495818/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495818/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495818/PDFSTART]PDF[/url] (Size: 231K)
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[b]Magnetic Iron Oxide Nanoworms for Tumor Targeting and Imaging (p NA)[/b]
Ji-Ho Park, Geoffrey von Maltzahn, Lianglin Zhang, Michael P. Schwartz, Erkki Ruoslahti, Sangeeta N. Bhatia, Michael J. Sailor
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200800004

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[b]The synthesis, in vitro, and in vivo behavior of tumor-homing magnetic nanoworms[/b] (NW) are described. The particles consist of a chainlike aggregation of iron oxide (IO) cores in a dextran coating. When conjugated with a tumor-targeting peptide, they interact more effectively with a tumor-based target in vitro relative to spherical nanoparticles. Untargeted NW display similar in vivo circulation times and enhanced passive accumulation in mouse xenograft tumors relative to untargeted spherical IO nanoparticles.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495817/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495817/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495817/PDFSTART]PDF[/url] (Size: 255K)
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[b]A Microfluidic Conjugated-Polymer Sensor Chip (p NA)[/b]
Soo-Han Eo, Simon Song, Bora Yoon, Jong-Man Kim
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200703007

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[b]A new, microfluidic polydiacetylene (PDA) sensor system[/b] based on the hydrodynamic focusing principle is developed. Narrow fluorescent bands are observed when the focused stream of a PDA solution contacts the sheath flows of cyclodextrin (CD) receptor molecules (see figure). The system allows for continuous and rapid monitoring of molecular recognition events.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495829/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495829/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495829/PDFSTART]PDF[/url] (Size: 256K)
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[b]Individual Water-Filled Single-Walled Carbon Nanotubes as Hydroelectric Power Converters (p NA)[/b]
Yuanchun Zhao, Li Song, Ke Deng, Zheng Liu, Zengxing Zhang, Yanlian Yang, Chen Wang, Haifang Yang, Aizi Jin, Qiang Luo, Changzhi Gu, Sishen Xie, Lianfeng Sun
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200702956

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[b]A voltage difference[/b] is detected in the
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generator
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part of individual water-filled SWNTs when a current is applied on their
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motor
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part. It is suggested that the measured voltage difference reveals a newly induced electromotive force, which is generated by a water flow inside the SWNT. The water molecules in the nanotube channel are in turn dragged to flow by the current applied on the
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motor
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part.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495828/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495828/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495828/PDFSTART]PDF[/url] (Size: 180K)
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[b]A Black Perylene Bisimide Super Gelator with an Unexpected J-Type Absorption Band (p NA)[/b]
Frank Würthner, Christoph Bauer, Vladimir Stepanenko, Shiki Yagai
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200702935

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[img]http://www3.interscience.wiley.com/cgi-bin/fulltext/118495827/ncontent[/img]
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[b]Self-assembled nanofibers[/b] of a chiral core-unsubstituted perylene bisimide dye exhibit an almost black color, which can be attributed to an unusual packing motif based on slipped J-type aggregation.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495827/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495827/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495827/PDFSTART]PDF[/url] (Size: 172K)
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[b]The Growth of Complex Nanostructures: Synergism of Dipolar Force and Stacking-Defects in Anisotropic Self-Assembly (p NA)[/b]
Xueyun Gao, Gengmei Xing, Weiguo Chu, Xingjie Liang, Yuliang Zhao, Long Jing, Hui Yuan, Yanyan Cui, Jinquan Dong
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200702900

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[b]Nanocrystalline gold dendrimers with multiple generations of branching[/b] are produced by the fusion of gold nanoparticles along {111} planes induced by dipolar forces generated upon plasmon excitation. Branching in these structures originates from the imperfect fusion of gold nanoparticles onto growing gold structures due to the introduction of stacking faults, as schematically illustrated in the figure.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495826/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495826/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495826/PDFSTART]PDF[/url] (Size: 313K)
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[b]Dendrimer-Functionalized Shell-crosslinked Iron Oxide Nanoparticles for In-Vivo Magnetic Resonance Imaging of Tumors (p NA)[/b]
Xiangyang Shi, Su He Wang, Scott D. Swanson, Song Ge, Zhengyi Cao, Mary E. Van Antwerp, Kevin J. Landmark, James R. Baker Jr
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200702770

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[b]A powerful magnetic nanoprobe[/b] with folic acid (FA)-targeting ligands is fabricated by dendrimer functionalization of Fe3O4 nanoparticles (NPs) precoated with crosslinkable and biocompatible polymer multilayer shells. This magnetic probe allows for magnetic resonance imaging of FA receptor-overexpressing tumor cells in vitro and of an early-stage tumor model in vivo (see picture).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495825/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495825/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495825/PDFSTART]PDF[/url] (Size: 366K)
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[b]A One-Step Approach to the Synthesis of ZrO[size=-1]2[/size]-Modified TiO[size=-1]2[/size] Nanotubes in Supercritical Carbon Dioxide (p NA)[/b]
Rahima A. Lucky, Paul A. Charpentier
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200702287

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[b]Zr-TiO2 nanotubes[/b] are synthesized viaa new surfactant-free sol-gel route in supercritical CO2. The morphology of the Zr-TiO2 nanotubes can be tailored by changing either the concentration of the starting materials or the acid-to-metal-alkoxide ratio. This synthesis procedure is simple and scaleable, using mild reaction conditions and a green solvent, and provides a high yield and high-quality nanotubes (see figure).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495824/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495824/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495824/PDFSTART]PDF[/url] (Size: 256K)
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[b]Direct Real-Space Observation of Stochastic Behavior in Domain Nucleation Process on a Nanoscale (p NA)[/b]
Mi-Young Im, Peter Fischer, Dong-Hyun Kim, Kyeong-Dong Lee, Sung-Hyun Lee, Sung-Chul Shin
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200702034

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[b]Stochastic behavior of nucleationprocess during magnetization reversalon a nanoscale in a[/b] nanogranularCoCrPt alloy film is directly observedutilizing magnetic soft X-raytransmission microscopy, whichprovides a spatial resolution of 15 nm.Thermal fluctuations in the orientationof the magnetic moments of the grainsplay a dominant role for the stochasticnature of domain nucleation in this system.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495823/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495823/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495823/PDFSTART]PDF[/url] (Size: 288K)
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[b]Microcantilevers with Nanochannels (p NA)[/b]
Pyung-Soo Lee, Junghyun Lee, Nayoung Shin, Kun-Hong Lee, Dongkyu Lee, Sangmin Jeon, Dukhyun Choi, Woonbong Hwang, Hyunchul Park
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200701490

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[b]Novel microcantilevers withnanochannels[/b] fabricated from anodicaluminum oxide (AAO) are described. Cantilevers based on AAO canprecisely control the dimensions ofthe nanochannels and provide surface areas several orders of magnitudelarger than conventional siliconcantilevers with flat surfaces.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495822/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495822/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495822/PDFSTART]PDF[/url] (Size: 289K)
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[b]Superelastic and Spring Properties of Si[size=-1]3[/size]N[size=-1]4[/size] Microcoils (p NA)[/b]
Chuanbao Cao, Hongli Du, Yajie Xu, Hesun Zhu, Taihua Zhang, Rong Yang
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200701021

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[b]Silicon nitride with helical structure[/b] was prepared on a large scale by CVD. On the microscale, these coiled Si3N4 ceramics still possess superelasticity and can recover their original shapes after cyclic loadings without noticeable deformations. These results suggest helical microcoils could have potential in microdevices for MEMS, motors, electromagnets, generators, and related equipment.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495835/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495835/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495835/PDFSTART]PDF[/url] (Size: 235K)
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[b]Nanowire-Based High-Performance
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Micro Fuel Cells
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: One Nanowire, One Fuel Cell (p NA)[/b]
Caofeng Pan, Hui Wu, Cheng Wang, Bo Wang, Lu Zhang, Zhida Cheng, Ping Hu, Wei Pan, Zhaoying Zhou, Xing Yang, Jing Zhu
Published Online: Apr 11 2008 4:55AM
DOI: 10.1002/adma.200700515

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[b]A micrometer-sized fuel cell based on Nafion/poly(vinyl pyrrolidone) nanowires[/b] is presented. The high-performance micro fuel cell containing a single NPNW proved easy to fabricate and delivered reproducible results. Values for the open-circuit voltage, maximum current-density, and power density were orders of magnitude higher than those of traditional fuel cells (see figure). Micro fuel cell assemblies may have future applications in integrated self-powered nanodevices.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495834/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/118495834/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/118495834/PDFSTART]PDF[/url] (Size: 267K)
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[b]Highly Conductive, Methanol Resistant Polyelectrolyte Multilayers (p NA)[/b]
Avni A. Argun, J. Nathan Ashcraft, Paula T. Hammond
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200703205

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[b]Highly conducting, methanol resistant[/b] thin films are fabricated using layer-by-layer (LBL) assembly. Pairing a sulfonated aromatic polyether with amine-based polycations yields LBL films with ionic conductivity values up to 3.5 × 10-2 S cm-1. Uniformly coating traditional fuel cell membranes with these LBL films (see figure) improves the power output of a direct methanol fuel cell by over 50%.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955003/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955003/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955003/PDFSTART]PDF[/url] (Size: 143K)
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[b]Sea Urchin Tooth Design: An
[img]http://www3.interscience.wiley.com/giflibrary/12/ldquo.gif[/img]
All-Calcite
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Polycrystalline Reinforced Fiber Composite for Grinding Rocks (p NA)[/b]
Yurong Ma, Sidney R. Cohen, Lia Addadi, Steve Weiner
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200702842

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[b]A convenient tooth.[/b] Here we investigate how the different kinds of calcite crystals in a sea urchin tooth (left) work together as an effective grinding tool. The polycrystalline matrix has a higher elastic modulus and hardness than the single crystals, yet both work together to produce a flat grinding surface (right).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955002/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955002/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955002/PDFSTART]PDF[/url] (Size: 270K)
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[b]Aerogel Templated ZnO Dye-Sensitized Solar Cells (p NA)[/b]
Thomas W. Hamann, Alex B. F. Martinson, Jeffrey W. Elam, Michael J. Pellin, Joseph T. Hupp
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200702781

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[b]Atomic layer deposition is employed to conformally coat low density, high surface area aerogel[/b] films with ZnO. The ZnO/aerogel membranes are incorporated as photoanodes in dye-sensitized solar cells, which exhibit excellent power efficiencies of up to 2.4% under 100 mW cm-2 light intensity.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955001/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955001/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955001/PDFSTART]PDF[/url] (Size: 200K)
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[b]Substrate-Independent Layer-by-Layer Assembly by Using Mussel-Adhesive-Inspired Polymers (p NA)[/b]
Haeshin Lee, Yuhan Lee, Andrea R. Statz, Junsung Rho, Tae Gwan Park, Phillip B. Messersmith
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200702378

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[b]A new method for creating layer-by-layer (LbL) assembled films[/b] on any substrate using polymers inspired by the high catechol content of mussel adhesive proteinsis presented. Catechol-derivatized polymers permit LbL assembly on challenging substrates without prior surface preparation. Catechol groups incorporated into the LbL film induce the reduction of silver ions to metallic silver when immersedin an aqueous metal salt solution, providing antibacterial properties.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955016/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955016/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955016/PDFSTART]PDF[/url] (Size: 216K)
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[b]Orthogonally Bifunctional Fluorescent Zeolite-L Microcrystals (p NA)[/b]
Michael Busby, Hannes Kerschbaumer, Gion Calzaferri, Luisa De Cola
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200702354

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[b]Microcrystals of zeolite L[/b] are functionalized with two different fluorescent dyes in a spatially resolved manner. The multiple functionalities and the selective derivatization of the channel entrances and of the coat of the zeolites result in interesting photophysical behavior as well as potential uses. The concept shown for the dyes can in principle be applied to any type of molecule.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955015/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955015/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955015/PDFSTART]PDF[/url] (Size: 283K)
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[b]Large-Scale Synthesis of Nitrogen-Rich Carbon Nitride Microfibers by Using Graphitic Carbon Nitride as Precursor (p NA)[/b]
Yuanchun Zhao, Zheng Liu, Weiguo Chu, Li Song, Zengxing Zhang, Dongli Yu, Yongjun Tian, Sishen Xie, Lianfeng Sun
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200702230

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[b]One-dimensional structures of nitrogen-rich carbon nitride[/b] are synthesized via a thermal evaporation process. The C
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N atomic rings ([i]s[/i]-triazine and/or tri-[i]s[/i]-triazine) present in the precursor remain stable during the thermal evaporation and vapor transfer. They act as basic building blocks during the microstructure assembly; thus ensuring a high nitrogen content in the final product.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955014/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955014/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955014/PDFSTART]PDF[/url] (Size: 227K)
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[b]Vapor-Solid-Solid Growth Mechanism Driven by Epitaxial Match between Solid AuZn Alloy Catalyst Particles and ZnO Nanowires at Low Temperatures (p NA)[/b]
Leonardo C. Campos, Matteo Tonezzer, Andre S. Ferlauto, Vincenzo Grillo, Rogério Magalhães-Paniago, Sergio Oliveira, Luiz O. Ladeira, Rodrigo G. Lacerda
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200701612

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[b]A comprehensive explanation for the precise mechanism of ZnO nanowire growth at low temperatures ([b][i]T[/i][/b]

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955013/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955013/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955013/PDFSTART]PDF[/url] (Size: 191K)
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[b]Well Ordered Polymer Melts from Blends of Disordered Triblock Copolymer Surfactants and Functional Homopolymers (p NA)[/b]
Vijay R. Tirumala, Alvin Romang, Sumit Agarwal, Eric K. Lin, James J. Watkins
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200701577

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[b]Addition of a functional homopolymer induces disorder-to-order transition[/b] in commercially available Pluronic surfactant melts. This approach may facilitate the use of amphiphilic surfactants in the industrial fabrication of structured nanomaterials.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955012/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955012/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955012/PDFSTART]PDF[/url] (Size: 228K)
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[b]Self-Assembly of Pseudoperiodic Arrays of Nanoislands on YSZ-(001) (p NA)[/b]
Michael D. Rauscher, Andrew Boyne, Suliman A. Dregia, Sheikh A. Akbar
Published Online: Apr 9 2008 1:36AM
DOI: 10.1002/adma.200701383

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[b]A planar film of gadolinia-doped ceria[/b] (GDC) was deposited on the (100) surface of an yttria stabilized zirconia (YSZ) single crystal substrate. Upon annealing, the film breaks up into an array of nanoislands (see figure) due to stress driven instability, providing an inexpensive route to the formation of ordered nanoarrays.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955026/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117955026/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117955026/PDFSTART]PDF[/url] (Size: 411K)
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[b]High-Moment Antiferromagnetic Nanoparticles with Tunable Magnetic Properties (p NA)[/b]
Wei Hu, Robert J. Wilson, AiLeen Koh, Aihua Fu, Anthony Z. Faranesh, Christopher M. Earhart, Sebastian J. Osterfeld, Shu-Jen Han, Liang Xu, Samira Guccione, Robert Sinclair, Shan X. Wang
Published Online: Apr 4 2008 7:39AM
DOI: 10.1002/adma.200703077

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[b]Synthetic antiferromagnetic (SAF) nanoparticles[/b] are fabricated by a combination of nanoimprint lithography and ferromagne tic multilayer structures, followed by release and stabilization of nanoparticles in solution. The SAF nanoparticles have desirable magnetic properties with respect to multiplex magnetic labeling and sorting, and can be functionalized with fluorescent dyes.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953496/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953496/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117953496/PDFSTART]PDF[/url] (Size: 221K)
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Communication
[b]Highly Efficient White Polymer Light-Emitting Diodes Based on Nanometer-Scale Control of the Electron Injection Layer Morphology through Solvent Processing (p NA)[/b]
Yong Zhang, Fei Huang, Yun Chi, Alex K.-Y. Jen
Published Online: Apr 4 2008 7:39AM
DOI: 10.1002/adma.200701988

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[b]Highly efficient white polymer light-emitting diodes[/b] (WPLEDs) are demonstrated using neutral conjugated polymer surfactant PFN-OH as the electron-injection layer through solution processing. The electroluminescence spectra and luminance efficiency are strongly dependent on the morphology of the PFN-OH films. The dramatic improvement of device performance is attributed to the efficient hole-blocking ability due to mixed solvent-induced PFN-OH chain aggregation.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953495/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953495/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117953495/PDFSTART]PDF[/url] (Size: 216K)
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Communications
[b]Gold-Induced Self-Assembly of Germanium Micropatterns and Their Use as Nanowire Templates (p NA)[/b]
Ji Wu, Jeffery L. Coffer
Published Online: Apr 4 2008 7:39AM
DOI: 10.1002/adma.200701826

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[b]In the search for non-lithographic methods for pattern formation on semiconductor surfaces[/b], a facile self-assembly method relying on Au-assisted thermal annealing is employed to obtain rectangular and square micro-patterns on single crystal Ge surfaces. Such patterns can be exploited for the templated growth of biomaterials such as the valerite phase of calcium carbonate.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953494/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953494/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117953494/PDFSTART]PDF[/url] (Size: 249K)
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[b]Specific Self-Assembly of Single Lipid Vesicles in Nanoplasmonic Apertures in Gold (p NA)[/b]
Andreas B. Dahlin, Magnus P. Jonsson, Fredrik Höök
Published Online: Apr 4 2008 7:39AM
DOI: 10.1002/adma.200701697

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[b]A combination of material-specific surface chemistry[/b], sequence-specific DNA hybridization, and size exclusion on the nanometer scale can be combined for high-precision self-assembly of lipid vesicles (see figure) to localized surface-plasmon-resonance-active nanoholes in thin Au films on SiO2.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953493/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953493/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117953493/PDFSTART]PDF[/url] (Size: 284K)
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[b]Chemical Vapor Growth of One-dimensional Magnetite Nanostructures (p NA)[/b]
Sanjay Mathur, Sven Barth, Ulf Werner, Francisco Hernandez-Ramirez, Albert Romano-Rodriguez
Published Online: Apr 4 2008 7:39AM
DOI: 10.1002/adma.200701448

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[b]One-dimensional nanoscopic Fe3O4 architectures are grown by molecule-based chemical vapor deposition[/b] CVD using [Fe(OBu[i]t[/i])3]2 precursor and Au particles as growth templates. Growth of magnetite shell on tin oxide nanowires is also achieved, obtaining magnetic-semiconductor heterostructures. Structural characterization of the different nanostructures and the first electrical measurements on an individual magnetite nanowire are reported.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953492/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117953492/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117953492/PDFSTART]PDF[/url] (Size: 354K)
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[b]A Nanoreactor Framework of a Au@SiO[size=-1]2[/size] Yolk/Shell Structure for Catalytic Reduction of [i]p[/i]-Nitrophenol (p NA)[/b]
Joongoo Lee, Ji Chan Park, Hyunjoon Song
Published Online: Apr 2 2008 8:13AM
DOI: 10.1002/adma.200702338

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[b]A nanoreactor system[/b] comprising gold cores and silica hollow shells with empty inner space demonstrated. The Au@SiO2 yolk/shell nanoreactor is synthesized by selective etching of the gold cores in Au@SiO2 core/shell particles (see figure). This nanoreactor framework catalyzes the reduction of [i]p[/i]-nitrophenol, exhibiting interesting size-dependent reaction property.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117952349/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117952349/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117952349/PDFSTART]PDF[/url] (Size: 291K)
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[b]Reversible Conductance Switching in Molecular Devices (p NA)[/b]
Auke J. Kronemeijer, Hylke B. Akkerman, Tibor Kudernac, Bart J. van Wees, Ben L. Feringa, Paul W. M. Blom, Bert de Boer
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200800053

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[b]A reliable and reproducible solid-state molecular electronic device[/b] that shows bidirectional conductance switching of molecular origin is demonstrated. The devices are manufactured by conventional processing techniques and are based on a molecular monolayer of photochromic diarylethenes, sandwiched between two electrodes, which switches reversibly and in situ between two conductance states via optical addressing.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950141/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950141/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950141/PDFSTART]PDF[/url] (Size: 351K)
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[b]Bimetallic Nanocobs: Decorating Silver Nanowires with Gold Nanoparticles (p NA)[/b]
Ray Gunawidjaja, Sergiy Peleshanko, Hyunhyub Ko, Vladimir V. Tsukruk
Published Online: Apr 2 2008 8:13AM
DOI: 10.1002/adma.200703170

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[b]Hybrid bimetallic nanocobs[/b], comprising a silver nanowire core surrounded by a gold nanoparticle shell linked together by a star polymer with terminal functional groups, revealed a greatly enhanced SERS ability. The SERS enhancement exceeded Raman scattering from isolated silver nanowires by about two orders of magnitude. Effective plasmon excitation provides a broad absorption band for SERS activation, which is also directionally dependent, making the nanocobs promising candidates for arrayed microstructures.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117952350/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117952350/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117952350/PDFSTART]PDF[/url] (Size: 372K)
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Communication
[b]Patterned Growth and Transfer of ZnO Micro and Nanocrystals with Size and Location Control (p NA)[/b]
Jesse J. Cole, Xinyu Wang, Robert J. Knuesel, Heiko O. Jacobs
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200703102

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[b]A method to fabricate and transfer crystalline ZnO[/b] with control over location, orientation, size, and shape is reported. The process uses an oxygen plasma treatment in combination with a photoresist pattern on magnesium-doped GaN substrates to define narrow nucleation regions and attachment points with 100 nanometer scale dimensions. Lateral epitaxial overgrowth follows nucleation to produce single-crystalline ZnO shown in the figure.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950136/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950136/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950136/PDFSTART]PDF[/url] (Size: 370K)
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Communications
[b]Néel Temperature Enhancement by Increasing the In-plane Magnetic Correlation in Layered Inorganic-Organic Hybrid Materials (p NA)[/b]
Yan-Zhen Zheng, Wei Xue, Shao-Liang Zheng, Ming-Liang Tong, Xiao-Ming Chen
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200702356

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[b]Three inorganic-organic hybrid compounds[/b] are hydrothermally synthesized by controlling the conformation of cyclohexane-1,2-dicarboxylate and related ligands, which have different infinite inorganic Mn
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O layers with an interesting effect of the in-plane magnetic correlation on the Néel temperature.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950135/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950135/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950135/PDFSTART]PDF[/url] (Size: 306K)
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[b]High-Performance Air-Stable Bipolar Field-Effect Transistors of Organic Single-Crystalline Ribbons with an Air-Gap Dielectric (p NA)[/b]
Qingxin Tang, Yanhong Tong, Hongxiang Li, Zhuoyu Ji, Liqiang Li, Wenping Hu, Yunqi Liu, Daoben Zhu
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200702145

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[b]High-performance bipolar OFETs[/b] are fabricated using single-crystalline sub-micrometer-sized ribbons of CuPc and F16CuPc and the technique of an air-gap dielectric. Their similar energy levels to the work function of the Au electrodes, the high mobility of their single crystals, and the great advantages of the air-gap dielectric result in a high performance of the bipolar devices. The devices show excellent air-stable characteristics with electron and hole mobilities as high as 0.17 and 0.1 cm2 V-1 s-1, respectively.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950140/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950140/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950140/PDFSTART]PDF[/url] (Size: 202K)
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[b]Responsive Assemblies: Gold Nanoparticles with Mixed Ligands in Microphase Separated Block Copolymers (p NA)[/b]
Qifang Li, Jinbo He, Elizabeth Glogowski, Xuefa Li, Jin Wang, Todd Emrick, Thomas P. Russell
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200702004

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[b]A simple method for controlling the spatial distribution of nanoparticles[/b] in a diblock copolymer is shown. By varying the ligand functionality of the nanoparticles, as well as the processing conditions, the distribution of gold nanoparticles in the microdomains of the diblock copolymer was controlled and altered. In addition, the nanoparticlesare found to affect the diblock copolymer morphologies. Thermal treatment caused a redistribution of the nanoparticles inside one microdomain.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950134/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950134/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950134/PDFSTART]PDF[/url] (Size: 364K)
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Communication
[b]Transparent, Low-Electric-Resistance Nanocomposites of Self-Assembled Block Copolymers and SWNTs (p NA)[/b]
Jinwoo Sung, Pil Sung Jo, Hyein Shin, June Huh, Byung Gil Min, Dong Ha Kim, Cheolmin Park
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200701535

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[b]A transparent PS-b-P4VP copolymer/SWNTs nanocomposite film[/b] is used as both source and drain electrode in a pentacene OTFT with transmittance and electricresistance values of 85% and 6000
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, respectively. The low electric resistance of the film is achieved by the selective doping of HAuCl4 in P4VP cores of the self-assembled block copolymer micelles, which simultaneously provides sufficientstability for the SWNTs suspension.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950139/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950139/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950139/PDFSTART]PDF[/url] (Size: 270K)
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Communications
[b]Surface Nanopatterning to Control Cell Growth (p NA)[/b]
Ludovic Richert, Fiorenzo Vetrone, Ji-Hyun Yi, Sylvia Francis Zalzal, James D. Wuest, Federico Rosei, Antonio Nanci
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200701428

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[b]Nanotopographical surfaces are a promising solution to modulate cell responses[/b] at the tissue/implant interface. Roughness and porosity at the nanometer scale can have a discriminatory effect by allowing a particular cell type to flourish (e.g., osteogenic cells; see figure) while limiting growth of another (e.g., fibroblastic cells).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950142/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950142/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950142/PDFSTART]PDF[/url] (Size: 220K)
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[b]Shear-Induced Organization in Flexible Polymer Opals (p NA)[/b]
Otto L. J. Pursiainen, Jeremy J. Baumberg, Holger Winkler, Benjamin Viel, Peter Spahn, Tilmann Ruhl
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200701363

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[b]Shear-induced organization in flexible polymer opals[/b] is studied using probing UV-surface diffraction combined with band gap measurements. These opals consist of a coherently ordered
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super domain
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characterized by a radial director vector and show anisotropic photonic behavior depending on the relative vectorial orientation of strain and director.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950138/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950138/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950138/PDFSTART]PDF[/url] (Size: 174K)
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[b]Nanoporous Carbon Films from
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Polyacrylonitrile-Grafted Colloidal Silica Nanoparticles (p NA)[/b]
Chuanbing Tang, Lindsay Bombalski, Michal Kruk, Mietek Jaroniec, Krzysztof Matyjaszewski, Tomasz Kowalewski
Published Online: Apr 1 2008 2:18AM
DOI: 10.1002/adma.200701115

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[b]Polyacrylonitrile (PAN) is grafted from colloidalr silica nanoparticles[/b] by atom transfer radical polymerization (see figure). Atomic force microscopy of these inorganic/organic hybrids confirms their well-defined,
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structure. Carbonization of the PAN corona and subsequent etching away of silica nanoparticle cores affords thin films of nanoporous carbon, which exhibit a narrow pore size distribution and a relatively high specific surface area in the range of 200-450 m2 g-1.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950137/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117950137/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117950137/PDFSTART]PDF[/url] (Size: 452K)
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[b]Protein-Modified Porous Silicon Nanostructures (p NA)[/b]
Luca De Stefano, Ilaria Rea, Paola Giardina, Annunziata Armenante, Ivo Rendina
Published Online: Mar 28 2008 5:12AM
DOI: 10.1002/adma.200702454

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[b]Biological passivation of porous silicon (PSi)-based optical devices[/b] is demonstrated. Infiltration by small amphiphilic fungal proteins called HFBs changes the wettability of the PSi surface (see figure) and protects the sponge-like structure against dissolution by basic solutions. This protein membrane leaves the sensing ability of an optical transducer unchanged, adding chemical stability that can be the key in biomolecular experiments.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949700/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949700/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117949700/PDFSTART]PDF[/url] (Size: 166K)
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[b]CNFs@CNTs: Superior Carbon for Electrochemical Energy Storage (p NA)[/b]
Jian Zhang, Yong-Sheng Hu, Jean-Philippe Tessonnier, Gisela Weinberg, Joachim Maier, Robert Schlögl, Dang Sheng Su
Published Online: Mar 28 2008 5:12AM
DOI: 10.1002/adma.200701685

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[b]Carbon-nanotube-encapsulated carbon nanofibers (CNFs@CNTs)[/b] with a novel one-dimensional structure are synthesized via the selective assembly of CNFs inside the channels of CNTs (see figure). The resulting novel carbon hybrid material serves as stable anode in lithium batteries during 120 charge/discharge cycles. This work provides a simple and efficient way of converting conventional CNTs into functional carbon materials with an outstandingly high volumetric storage density.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949706/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949706/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117949706/PDFSTART]PDF[/url] (Size: 459K)
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[b]LiF as an n-Dopant in Tris(8-hydroxyquinoline) Aluminum Thin Films (p NA)[/b]
Kaushik Roy Choudhury, Jong-hyuk Yoon, Franky So
Published Online: Mar 28 2008 5:12AM
DOI: 10.1002/adma.200701657

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[b]Facile non-alkaline n-doping of Alq3with LiF[/b] is achieved by co-evaporation. Optimal doping not only leads to enhanced device currents and conductivity, but also changes the very nature of carrier injection and transport. Using this scheme, efficient electron injection is achieved without using low-work-function cathodes. A doped transport layer (see figure) inOL EDs leads to balanced injection andtransport of charge carriers and resultsin excellent device performance.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949704/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949704/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117949704/PDFSTART]PDF[/url] (Size: 332K)
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[b]A Catalytic Reaction Inside a Single-Walled Carbon Nanotube (p NA)[/b]
Hidetsugu Shiozawa, Thomas Pichler, Alexander Grüneis, Rudolf Pfeiffer, Hans Kuzmany, Zheng Liu, Kazu Suenaga, Hiromichi Kataura
Published Online: Mar 28 2008 5:12AM
DOI: 10.1002/adma.200701466

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[b]A catalytic reaction inside a single-walled carbon nanotube[/b] is demonstrated by using encapsulated ferrocene molecules as precursors. A combined spectroscopic and microscopic study unravels the mechanism of catalytic inner tube growth. This confined process provides for the controlled iron growing of double-walled carbon nanotubes and represents a new route for materials design.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949703/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949703/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117949703/PDFSTART]PDF[/url] (Size: 447K)
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[b]The Effect of an Active Substrate on Nanoparticle-Enhanced Fluorescence (p NA)[/b]
Shy-Hauh Guo, Shu-Ju Tsai, Hung-Chih Kan, De-Hao Tsai, Michael R. Zachariah, Raymond J. Phaneuf
Published Online: Mar 28 2008 5:12AM
DOI: 10.1002/adma.200701126

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[b]Proximity of fluorescent molecules to noble metal nanoparticles[/b] leads to a strong enhancement of the fluorescent intensity during irradiation with light, a consequence of resonant coupling to localized particle plasmons. In this communication we show that the substrate can have a profound effect on this simple picture, not merely shifting the resonance, but actively reshaping the local fields, and resulting in even larger enhancements.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949702/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949702/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117949702/PDFSTART]PDF[/url] (Size: 345K)
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[b]Visible-Light Photocatalysis in Titania-Based Mesoporous Thin Films (p NA)[/b]
Saurabh S. Soni, Mark J. Henderson, Jean-François Bardeau, Alain Gibaud
Published Online: Mar 28 2008 5:12AM
DOI: 10.1002/adma.200701066

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[b]Photocatalytic activity in the visible [/b]part of the solar spectrum (442 nm) is demonstrated for highly organized mesoporous nanocrystalline titania thin films doped with thiourea. This property, which is of interest for the further development of photovoltaic devices operating in sunlight, is revealed by monitoring the photodegradation of methylene blue (see figure) upon contact with an N-doped TiO2 film as a function of irradiation time and film thickness.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949701/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117949701/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117949701/PDFSTART]PDF[/url] (Size: 217K)
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[b]Multiplex Imaging of Pancreatic Cancer Cells by Using Functionalized Quantum Rods (p NA)[/b]
Ken-Tye Yong, Indrajit Roy, Haridas E. Pudavar, Earl J. Bergey, Kenneth M. Tramposch, Mark T. Swihart, Paras N. Prasad
Published Online: Mar 20 2008 4:09AM
DOI: 10.1002/adma.200702462

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[b]A technique for labeling of live human cancer cells[/b] is presented. The imaging technique employs semiconductor quantum rods of CdSe/CdS/ZnS for multiplex labeling. The technique is further used to diagnose human pancreatic cancer by conjugating QRs with monoclonal antibodies (anti-Claudin 4 and anti-mesothelin).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943828/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943828/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117943828/PDFSTART]PDF[/url] (Size: 422K)
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[b]Reversibility of the Perovskite-to-Fluorite Phase Transformation in Lead-Based Thin and Ultrathin Films (p NA)[/b]
Geoff L. Brennecka, Chad M. Parish, Bruce A. Tuttle, Luke N. Brewer, Mark A. Rodriguez
Published Online: Mar 20 2008 4:09AM
DOI: 10.1002/adma.200702442

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[b]As film thicknesses decrease below 50 nm,[/b] control of cation stoichiometry in Pb-based dielectrics becomes increasingly difficult, a problem that is exacerbated by interaction with technologically important Pt bottom electrodes. Post-crystallization annealing in a Pb-rich atmosphere is shown to be a general technique to reversibly convert low-permittivity Pb-deficient fluorite into ferroelectric high-permittivity stoichiometric perovskite with outstanding dielectric properties (see figure).

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943827/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943827/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117943827/PDFSTART]PDF[/url] (Size: 289K)
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[b]Electrically Programmable Surfaces for Configurable Patterning of Cells (p NA)[/b]
Chao Yung Fan, Yi-Chung Tung, Shuichi Takayama, Edgar Meyhöfer, Katsuo Kurabayashi
Published Online: Mar 20 2008 4:09AM
DOI: 10.1002/adma.200702191

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[b]A microfluidic device surface[/b] coated with block copolymer and extracellular matrix (ECM) protein layers (see Figure) shows electrical programmability for cell immobilization. The surface has demonstrated the ability to pattern C2C12 murine myoblasts cells with their morphology and surface density adjustable by varying the applied electrode bias.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943826/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943826/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117943826/PDFSTART]PDF[/url] (Size: 320K)
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[b]Al-Doped TiO[size=-1]2[/size] Films with Ultralow Leakage Currents for Next Generation DRAM Capacitors (p NA)[/b]
Seong Keun Kim, Gyu-Jin Choi, Sang Young Lee, Minha Seo, Sang Woon Lee, Jeong Hwan Han, Hyo-Shin Ahn, Seungwu Han, Cheol Seong Hwang
Published Online: Mar 20 2008 4:09AM
DOI: 10.1002/adma.200701085

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[b]Al-doped TiO2 thin films to be used in future DRAM capacitors[/b] with excellent leakage properties as well as high dielectric constants are fabricated. The next generation stack structured DRAM cell composed of a transistor and a capacitor is shown (see Figure). A large cell capacitance is required for successful operation of DRAMs irrespective of the feature size of the cell. Therefore, as scaling down of the DRAMs proceeds, a higher-[i]k[/i] material such as Al-doped TiO2 has to be eventually implemented in the capacitor.

[url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943838/ABSTRACT]Abstract[/url]  |  [url=http://www3.interscience.wiley.com/cgi-bin/abstract/117943838/REFERENCES]References[/url] | Full Text: [url=http://www3.interscience.wiley.com/cgi-bin/fulltext/117943838/PDFSTART]PDF[/url] (Size: 360K)
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Research News
[b]Silicon Photovoltaics Using Conducting Photonic Crystal Back-Reflectors (p NA)[/b]
Paul G. O'Brien, Nazir P. Kherani, Alongkarn Chutinan, Geoffrey A. Ozin, Sajeev John, Stefan Zukotynski
Published Online: Mar 28 2008 5:12AM
DOI: 10.1002/adma.200702219

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[b]One potential approach to enhan