nanosurface 2006-12-31 22:23
基于生物医学应用的高性能纳米磁性粒子技术
[size=3][color=DarkGreen] 纳米粒子或者量子点已经成为纳米科技在生物医学中最有可能首先广泛应用的领域之一,有可能对病例检测和诊断,药物释放和恶性肿瘤治疗技术领域带来重大突破.本专题主要收集高性能纳米磁性粒子(单组元,多组元,核/壳层结构等)制备,表征,:nst性能和生物医学应用的文献资料及其有关进展.欢迎大家发帖支持.[/color][/size]
nanosurface 2006-12-31 22:32
[align=center][b][size=3][color=DarkGreen]Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices[/color][/size]
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[/color][/size][align=center][size=3][color=DarkGreen]Sun, Shouheng; Murray, C. B.; Weller, Dieter; Folks, Liesl; Moser, Andreas[/color][/size]
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[size=3][color=DarkGreen][b][i]Science [/i][/b](Washington, D. C.) (2000),[b] 287[/b](5460), 1989-1992 CODEN: SCIEAS; ISSN: 0036-8075. English.[/color][/size]
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Synthesis of monodisperse iron-platinum (FePt) nanoparticles by reduction of platinum acetylacetonate and decomposition of iron pentacarbonyl in the presence of oleic acid and oleyl amine stabilizers is reported. The FePt particle composition is readily controlled, and the size is tunable from 3- to 10-nm diameter with a standard deviation of <5%. These nanoparticles self-assemble into three-dimensional superlattices. Thermal annealing converts the internal particle structure from a chem. disordered fcc. phase to the chem. ordered face-centered tetragonal phase and transforms the nanoparticle superlattices into ferromagnetic nanocrystal assemblies. These assemblies are chem. and mech. robust and can support high-density magnetization reversal transitions.
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nanosurface 2006-12-31 22:42
[align=center][size=4][b]Magnetization directions of individual nanoparticles[/b][/size][/align]'~+x9M\`5h9IL4C-r
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Majetich, S. A.; Jin, Y.6XbZ!M;ab|
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[b]Science [/b](Washington, D. C.) (1999), [b]284[/b](5413), 470-473 CODEN: SCIEAS; ISSN: 0036-8075. English.
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