现代科学仪器Issue(4)：109-112,4.
一种高稳定低电压扫描隧道显微镜镜体结构
A Scanning Tunneling Microscope with High Stability and Low Voltage Operability
陈旭 1陆轻铀 2张福光 1王刚1
作者信息
- 1. 合肥市第一中学 合肥230601
- 2. 中国科学技术大学合肥微尺度物质科学国家实验室 合肥230026
- 折叠
摘要
Abstract
This paper reports a scanning tunneling microscope (STM) head structure with high stability and low voltage operability,in which many factors to enhance stability and precision are considered:(1)the head structure is designed to possess high symmetry;(2)the vertical piezoelectric inertial slider for coarse approach is designed to be independent with the scan structure,which prevents the instability of the coarse approach motor from entering the scan structure;(3)the more difficult upward stepping (due to gravity) of the coarse approach inertial motor is designed to be driven by the more powerful elongating displacement of the piezoelectric material so as to reduce the operating voltage (thus improving electronic noises and precision),and finally the first ＜18V vertical stepping STM is implemented;(4)the scan structure is designed to be very small and made of low and similar thermal expansion coefficient sapphire and high purity titanium to cancel thermal drift;(5)the coarse approach inertial slider is implemented by the sliding of polished sapphire balls on polished rods,which can increase the rigidity and reduce the drift of the STM head without increasing the friction forces (thus favoring the implementation of low voltage STM).The performance of the STM is demonstrated by the high quality atomically resolved graphite images obtained in ambient conditions.关键词
原子分辨率/扫描隧道显微镜/镜体结构Key words
Scanning tunneling microscope (STM)/Atomic resolution/Low voltage STM分类
矿业与冶金引用本文复制引用
陈旭,陆轻铀,张福光,王刚..一种高稳定低电压扫描隧道显微镜镜体结构[J].现代科学仪器,2013,(4):109-112,4.
