查看完整版本: 纳米环状结构的形成机理

纳米环状结构的形成机理

在Chem8.org论坛上看到一位网友提出了这个问题，收集了部分资料。但哪里基本上没有讨论，一侧问题相对复杂，二则，哪里搞纳米材料的人相对少一些，今天读了一篇文献的摘要。我觉得很有意思。先把这个帖子转过来：
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How are these ring structures formed? What is the driving force for these curved structures? Is there any common feature for the following structures with diverse chemical origins (including inorganic and organic compounds, polyelectrolytes, bundled CNT)?
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Science, 2004, 303, 1348.-h|Vn0{Fi#SH
Single-Crystal Nanorings Formed by Epitaxial Self-Coiling of Polar nanobelts.g_i:Ix(^_eW$z k
Xiang Yang Kong, Yong Ding, Rusen Yang, Zhong Lin Wang
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i,] rLuS Single-Crystal Nanorings
y1H6os/xtW O The most common nano-structures are nanotubes and nanowires, but researchers have also created other nano-structures - such as these 'nanorings'. Nanorings of zinc oxide can form spontaneously under certain conditions. Electrostatic forces seem to cause a nanobelt to curve, while short range chemical bonding fuses the end, creating a single crystal ring. Zinc oxide nanorings formed by self-coiling of nanobelts may be useful in research and in the production of nanoscale devices.
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Solid State Communications 2004, 131, 435.C!gq"p2r1oM'u |&V
Synthesis, structure, and photoluminescence of Zn2SnO4 single crystal nanobelts and nanorings
Lf[$V8Y#c Xie, S. S. et al.6EI*N(J/jYk

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F+M't3_R J. Am. Chem. Soc. 2006, 128, 1466. DOI: 10.1021/ja0578000
9X5|Y/afa3V(B|{P Springs, Rings, and Spirals of Rutile-Structured Tin Oxide Nanobelts
D-S9dd{r4C Rusen Yang and Zhong Lin Wang
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Adv. Mater. 1998, 10, 351.
?8H"N!h)_C.q-Y(O Surprising Superstructures: Rings
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l Tobias Vossmeyer, Sung-Wook Chung, William M. Gelbart, and James R. Heath M!P[JX?%C'X
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A: carbon nanotube rings (P. McEuen, personal communication, 1997)$b
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B: nanocrystal rings (Heath, J. R. et al. Angew. Chem. Int. Ed. Engl. 1997, 36, 1078.)J/zI^7Wm ^ |T}
C: porphyrin rings (Nolte, R. J. M. et al. J. Am. Chem. Soc. 1996, 118, 8549.)
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[img]http://biochemater.bokee.com/inc/Nanoring_NT.JPG[/img]
!XN3pi#] `!P]p H6D A: rings of single-walled carbon nanotube bundles (Smalley, R. E. et al. Nature 1997, 385, 780)i&O^ U+GE}
B: coils of single-walled carbon nanotube bundles (Avouris, P. et al. Nature 1999, 398, 299),`o@4E$xI
C: rings and coils of double-walled carbon nanotube bundles (Colomer, J.-F. et al. Nano Lett. 2003, 3, 685)
BpO\eY D: rings of carbon nanotubes aligned in adirection normal to the substrate surface (Dai L. M. et al. J. Mater. Chem. 1999, 9, 1221.)f'hSI'Z'MLiW
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Large-Scale Synthesis of Rings of Bundled Single-Walled Carbon Nanotubes by Floating Chemical Vapor Deposition8N[%An)B0r*RKh
Adv. Mater. 2006, 18, 1817-1821.;_k~?LwH``*A
L. Song, L. J. Ci, L. F. Sun, C. Jin, L. Liu, W. Ma, D. Liu, X. Zhao, S. Luo, Z. Zhang, Y. Xiang, J. Zhou, W. Zhou, Y. Ding, Z. L. Wang, S. Xie
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8cr%RNJf"dn.P(n J. Phys.: Condens. Matter 2004, 16, S210.-M2e+Y7? p*d \x2?/A.l
Self-assembled polyelectrolyte nanorings observed by liquid-cell AFM
,sZ3X },H&Q.u J-Luis Menchaca, Hector Flores, Frederic Cuisinier and Elias Perez!smR2oBl
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[img]http://biochemater.bokee.com/inc/Nanoring_polyelectrolyte.JPG[/img]

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B: PEI–PSS-PAH layer/U)Q,\8_Rs
Ring structure formed by PEI–PSS is kept when the PAH polyelectrolyte is injected. ring dimensions change due to the third polyelectrolyte (image: 5 × 5 µm; z range: 10 nm).)yQ|/E5pxlQ k8Yk
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'K;lS.C K8^4t:O&Z M J. Phys. Chem. B 2006, 110, 6432.
`RLIM c3q(W+` Block-Copolymer-Controlled Growth of CaCO3 Microrings2v0vl(ZL
Yun-Xiang Gao, Shu-Hong Yu, Huaiping Cong, Jun Jiang, An-Wu Xu, W. F. Dong, and Helmut Colfen
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[img]http://biochemater.bokee.com/inc/Nanoring_2.JPG[/img]
}5u#j(m4M` D J. Am. Chem. Soc. 2005, 127, 18262. DOI: 10.1021/ja055734wT!T/N;Jp0Q.vt*IE
Semiconductor Rings Fabricated by Self-Assembly of Nanocrystals
d(LE@-e Bin Liu and Hua Chun Zeng(V k3{&}+x;f

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Y@Ioj Adv. Mater. 2005, 17, 1781.
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_ Synthesis and Photoluminescence of SnO2/SiO2 Microrings
TQ1pg8bTH X. An, G. W. Meng, Q. Wei, X. Zhang, Y. Hao, L. D. Zhang#]!NI4g(N@6CPs
[img]http://biochemater.bokee.com/inc/Nanoring_3.JPG[/img][/quote]

做结构能做到这样很不错的。'FF5EF*h)\2[1J
偶还是个新手，只能看看了。发表不了评论。

纳米环

分单晶还是多晶 i:pe kY2t
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