A REPORT ON SPECKLE AND COHERENT DIFFRACTION PHENOMENA IN SELECTED-AREA TRANSMISSION ELECTRON-DIFFRACTION PATTERNS

被引：1

作者：

DAYKIN, AC ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801

来源：

ULTRAMICROSCOPY | 1994年 / 55卷 / 02期

基金：

美国国家科学基金会;

关键词：

Coherent light - Colloids - Crystalline materials - Electromagnetic wave diffraction - Solutions - Speckle - Transmission electron microscopy;

D O I：

10.1016/0304-3991(94)90163-5

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

This paper presents a report on coherent interference effects in selected-area transmission electron diffraction patterns. In particular, it is shown that the coherent small-angle scatter seen around the centrally transmitted beam from nanocrystalline materials is similar to the speckle patterns that occur when a laser diffracts from a disordered sample. Laser speckle patterns are used routinely to study dynamic parameters of colloidal solutions and it is suggested that similar-experiments could be performed with electrons. The significance of this lies in the relative wavelengths of the two radiations and, thus, instead of colloidal particles, atomic-scale dynamics could be studied.

引用

页码：121 / 125

页数：5

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