自制扫描隧道显微镜探针尖的比较研究

摘要

A probe plays a crucial role in scanning tunneling microscope imaging. In this paper, The tungsten wire probe obtained using electrochemical etching method and the platinum-iridium probe through shear method in our own laboratory were analyzed via the image of grating by using two probes scan. The results show that, compared to platinum-iridium probe, although tungsten wire probe to be made is complex and difficult to control the reaction conditions, the tungsten wire probe which in sharp axisymmetric form to scan the sample topography is more subtle, and is not easy to lose topography information, and is appropriate as scanning probe. The study of scanning tunneling microscope probe provided a basis for the selection of probe.%　　探针对扫描隧道显微镜成像起至关重要的作用。本文分别对电化学腐蚀法自制的钨丝探针和剪切法制得的铂铱探针进行扫描光栅图像比较分析。结果表明，相比铂铱探针，钨丝探针虽然制备繁琐，反应条件不易控制，但是尖锐轴对称形的钨丝探针扫描样品形貌更加细微，用作扫描隧道显微镜探针时扫描成像质量高。该研究为扫描隧道显微镜探针的选用提供了依据。