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Metallic Solids

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

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Updated: Jul 27, 2026

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

自组装的多功能二元纳米粒子超级网的结构特征.

Elena V Shevchenko¹, Dmitri V Talapin, Christopher B Murray

¹IBM Research Division, T. J. Watson Research Center, Nanoscale Materials and Devices, 1101 Kitchawan Road, Yorktown Heights, New York 10598, USA. evshevchenko@lnl.gov

Journal of the American Chemical Society

|March 16, 2006

概括

研究人员使用各种纳米晶体创建了多样化的二进制超级网格,展示了可调节的特性和新的材料可能性. 这些有序组件模仿原子晶体的生长,扩大了设计纳米材料的图书馆.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
晶体学晶体学是指结晶学.

背景情况:

纳米晶体自组装成有序的二进制超级网格,类似于合晶体.
这些超级网格保留了它们构成的纳米晶体的调节性质.
在纳米粒子组装和原子尺度晶体生长之间存在相似之处.

研究的目的:

为了证明各种各样的二元纳米粒子超级格子的形成.
描述这些结构,了解它们形成的因素.
探索二进制超级格子作为多功能元材料的潜力.

主要方法:

使用单分散纳米晶体 (例如,PbS,PbSe,CoPt3,Fe2O3,Au,Ag,Pd) 合成的二进制超级网.
不同的粒子大小,度和电荷控制组装.
利用结构性特征技术来识别石化度和对称度.

主要成果:

识别了具有多种类型 (AB到AB13) 和对称性 (立方体,六角形,四角形,正角形) 的超级网格.
通过调整参数观察到具有相同固态度的多态结构的形成.
证明各种相互作用 (库伦比克,范德瓦尔斯,二极二极) 影响共结晶.

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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

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Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

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结论:

二元超级格子代表了一种具有可调节性质和结构的新型材料.
纳米粒子组装为创建复杂的有序材料提供了一条通用的途径.
这些发现扩大了设计多功能纳米复合材料和元材料的可能性.