Dynamics of annular bright field imaging in scanning transmission electron microscopy
Dynamics of annular bright field imaging in scanning transmission electron microscopy
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DOI：
10.1016/j.ultramic.2010.04.004
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发表时间：
2010-06-01
期刊：
影响因子：
2.2
通讯作者：
Ikuhara, Y.
中科院分区：
文献类型：
--
作者：
Findlay, S. D.;Shibata, N.;Ikuhara, Y.
我们探讨了在扫描透射电子显微镜中所谓的环形明场模式中的图像形成的动力学，其中环形检测器与位于照明锥内的检测器收集范围一起使用，即明场区域。我们表明，这种成像模式使我们能够可靠地成像轻和重列的厚度和散焦值的范围内，我们解释了所涉及的对比度机制。被认为是探针和探测器孔径大小的作用，是柱间间距和局部紊乱的方法的灵敏度。(C)2010 Elsevier B.V.保留所有权利。
We explore the dynamics of image formation in the so-called annular bright field mode in scanning transmission electron microscopy, whereby an annular detector is used with detector collection range lying within the cone of illumination, i.e. the bright field region. We show that this imaging mode allows us to reliably image both light and heavy columns over a range of thickness and defocus values, and we explain the contrast mechanisms involved. The role of probe and detector aperture sizes is considered, as is the sensitivity of the method to intercolumn spacing and local disorder. (C) 2010 Elsevier B.V. All rights reserved.