用于制备非常尖锐的金扫描隧道显微镜针尖的单步电化学方法。

Single-step electrochemical method for producing very sharp Au scanning tunneling microscopy tips.

作者信息

Gingery David, Bühlmann Philippe

机构信息

Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, USA.

出版信息

Rev Sci Instrum. 2007 Nov;78(11):113703. doi: 10.1063/1.2804132.

DOI:10.1063/1.2804132

PMID:18052476

Abstract

A single-step electrochemical method for making sharp gold scanning tunneling microscopy tips is described. 3.0M NaCl in 1% perchloric acid is compared to several previously reported etchants. The addition of perchloric acid to sodium chloride solutions drastically shortens etching times and is shown by transmission electron microscopy to produce very sharp tips with a mean radius of curvature of 15 nm.

摘要

描述了一种用于制作尖锐金扫描隧道显微镜针尖的单步电化学方法。将1%高氯酸中的3.0M氯化钠与几种先前报道的蚀刻剂进行了比较。向氯化钠溶液中添加高氯酸可大幅缩短蚀刻时间，并且透射电子显微镜显示，该方法能产生平均曲率半径为15纳米的非常尖锐的针尖。