金纳米晶体中相干电子衍射揭示的高指数晶面
High-index facets in gold nanocrystals elucidated by coherent electron diffraction.
机构信息
Center for Microanalysis of Materials, Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
出版信息
Nano Lett. 2013 Apr 10;13(4):1840-6. doi: 10.1021/nl400609t. Epub 2013 Mar 18.
Abstract
Characterization of high-index facets in noble metal nanocrystals for plasmonics and catalysis has been a challenge due to their small sizes and complex shapes. Here, we present an approach to determine the high-index facets of nanocrystals using streaked Bragg reflections in coherent electron diffraction patterns, and provide a comparison of high-index facets on unusual nanostructures such as trisoctahedra. We report new high-index facets in trisoctahedra and previous unappreciated diversity in facet sharpness.
摘要
由于其尺寸小且形状复杂，贵金属纳米晶体的高指数晶面的特性一直是一个挑战。在这里，我们提出了一种使用相干电子衍射图案中的条纹布拉格反射来确定纳米晶体的高指数晶面的方法，并对例如三角十二面体等不常见的纳米结构的高指数晶面进行了比较。我们报告了三角十二面体中的新的高指数晶面以及以前未被注意到的晶面尖锐程度的多样性。
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