Effects of residual aberrations explored on single-walled carbon nanotubes
Effects of residual aberrations explored on single-walled carbon nanotubes
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DOI：
10.1016/j.ultramic.2012.03.008
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发表时间：
2012-05-01
期刊：
影响因子：
2.2
通讯作者：
Kaiser, Ute
中科院分区：
文献类型：
--
作者：
Biskupek, Johannes;Hartel, Peter;Kaiser, Ute
研究了几何残余像差对单壁碳纳米管(SWNT)像差校正的高分辨电子显微镜(HRTEM)图像对比度的影响。使用成像C-S校正器手动调整和设置个人像差。我们演示了有经验的用户如何在图像中直接识别Coma B-2，以及它如何模糊对比度。即使有未校正(分辨率限制)的球差C-S，也必须考虑并必须最小化彗差B-2。给出了可耐受昏迷的限度。实验结果通过图像仿真得到了验证。(C)2012爱思唯尔B.V.保留所有权利。
The effects of geometric residual aberrations such as coma B-2 and two-fold astigmatism A(1) on the contrast in aberration corrected high resolution transmission electron microscopy (HRTEM) images are investigated on single-walled carbon nanotubes (SWNT). The individual aberrations are adjusted and set up manually using an imaging C-S-corrector. We demonstrate how coma B-2 can be recognized by an experienced user directly in the image and how it blurs the contrast. Even with uncorrected (resolution limiting) spherical aberration C-S the coma B-2 has to be considered and must be minimized. Limits for a tolerable coma are given. The experiments are confirmed by image simulations. (C) 2012 Elsevier B.V. All rights reserved.