Control of Apex Shape of the Fiber Probe Employed in Photon Scanning Tunneling Microscope by a Multistep Etching Method

R. Uma Maheswari, Shuji Mononobe, Motoichi Ohtsu, Motoichi Ohtsu

研究成果: Article査読

13 被引用数 (Scopus)

抄録

In this paper, we discuss about the control of the shape of the very apex of a sharpened fiber probe used in photon scanning tunneling microscope (PSTM) by means of a method based on selective chemical etching. Under ambient conditions, through a multistep etching method proposed here, fiber probes with a flattened apex having a diameter of around 15–20 nm could be produced with high reproducibility. It has also been discovered that, during the etching process, the shape of the apex of the probe takes a rounded or a flattened shape with respect to the etching time in an almost cyclic fashion and such a phenomenon could help in understanding the mechanism of the etching process. These kind of probes with flat apex after metal coating are suitable for the fabrication of apertured probes used in PSTM and also for super tips which have a promising future as nanosensors in the fields of biology and biochemistry.

本文言語English
ページ(範囲)2308-2313
ページ数6
ジャーナルJournal of Lightwave Technology
13
12
DOI
出版ステータスPublished - 1995 12
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学

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