Hou Yubin, Wang Jihui, Lu Qingyou
Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Anhui, People's Republic of China.
Rev Sci Instrum. 2008 Nov;79(11):113707. doi: 10.1063/1.3005484.
We describe the first lateral junction and fully low voltage scanning tunneling microscope, featuring very high precision, stability, compactness, and image quality (highly oriented pyrolytic graphite atomic resolution images). In its core, the tip and sample each sit on one of two parallel-mounted piezoelectric tube scanners so that the tip-sample gap is regulated along the scanners' pairing direction. The scanner's large lateral deflection provides a large gap regulation range even under low voltages, allowing exclusively using only low voltage (less than +/-15 V) operational amplifiers to precisely implement the coarse (inertial slider) and fine approach, feedback control, and hence the entire electronics. Because the scanners are identical and adjacent, thermal drifts are minimal.
我们描述了第一台横向结型和全低电压扫描隧道显微镜，其具有非常高的精度、稳定性、紧凑性和图像质量（高取向热解石墨原子分辨率图像）。其核心部分，针尖和样品分别位于两个平行安装的压电管扫描器之一上，以便沿扫描器的配对方向调节针尖 - 样品间隙。扫描器的大横向偏转即使在低电压下也提供了大的间隙调节范围，允许仅使用低电压（小于+/-15 V）运算放大器来精确实现粗调（惯性滑块）和微调进近、反馈控制，从而实现整个电子设备。由于扫描器相同且相邻，热漂移最小。
