IMAGING BIOLOGICAL MACROMOLECULES BY STM - QUANTITATIVE INTERPRETATION OF TOPOGRAPHS
IMAGING BIOLOGICAL MACROMOLECULES BY STM - QUANTITATIVE INTERPRETATION OF TOPOGRAPHS
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DOI：
10.1016/0304-3991(90)90067-v
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发表时间：
1990-12-01
期刊：
影响因子：
2.2
通讯作者：
ENGEL, A
中科院分区：
文献类型：
--
作者：
STEMMER, A;ENGEL, A
讨论了通过干涉测量法或直接从扫描隧道显微镜（STM）形貌图中校准STM扫描器件的x、y、z灵敏度、非线性和频率响应的方法。 提出了一种技术来测量完整的STM反馈单元的频率响应，并导出在z方向上的最大速度，该最大速度允许人们估计仍然允许人们跟踪表面波纹的最大扫描速度。 STM的信号传输特性进行了评估，在一个直接的比较与高分辨率透射电子显微镜上一个相同的试样面积。 尖端和试样之间的污染物和有限的尖端半径的各种影响受到特别关注。
Methods are discussed which permit the calibration of x-, y-, z-sensitivities, non-linearities and frequency responses of the scanning device of a scanning tunneling microscope (STM) either by interferometry or directly from STM topographs. A technique is presented to measure the frequency response of the complete STM feedback unit and to derive a maximum speed in z direction which allows one to estimate the maximum scanning speed still permitting one to track surface corrugations. The signal transfer characteristics of a STM are evaluated in a direct comparison with high resolution transmission electron microscopy on an identical specimen area. The various effects of contaminants between tip and specimen and the finite tip radius receive special attention.