On the interpretation of the forbidden spots observed in the electron diffraction patterns of flat Au triangular nanoparticles

被引：45

作者：

Reyes-Gasga, J. ^{[1
]}

Gomez-Rodriguez, A. ^{[1
]}

Gao, Xiaoxia ^{[2
]}

Jose-Yacaman, M. ^{[2
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Fis, Dept Mat Condensada, Mexico City 01000, DF, Mexico

[2] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA

来源：

ULTRAMICROSCOPY | 2008年 / 108卷 / 09期

基金：

美国国家科学基金会;

关键词：

gold nanoparticles; nanostructures electron diffraction; high resolution electron microscopy;

D O I：

10.1016/j.ultramic.2008.03.005

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

In many cases nanostructures present forbidden spots in their electron diffraction patterns when they are observed by transmission electron microscopy (TEM). To interpretate their TEM and high resolution transmission electron microscopy (HRTEM) images properly, an understanding of the origin of these spots is necessary. In this work we comment on the origin of the forbidden spots observed in the [111] and [112] electron diffraction patterns of flat gold triangular nanoparticles. The forbidden spots were successfully indexed as corresponding to the first laue Zone (FOLZ) and the HRTEM images presented a contrast produced by the interference of the zero-order Laue zone (ZOLZ) and FOLZ spots. We discuss the use of the forbidden spots in the study of the structure of nanoparticles and show that they are related to the shape and incompleteness of layers in the very thin particles. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：929 / 936

页数：8

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