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

Rajagopalan Umamaheswari, Shuji Mononobe, Motoichi Ohtsu, Motoichi Ohtsu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2308-2313
Number of pages6
JournalJournal of Lightwave Technology
Volume13
Issue number12
DOIs
Publication statusPublished - 1995 Jan 1
Externally publishedYes

Fingerprint

apexes
microscopes
etching
scanning
fibers
probes
photons
metal coatings
biochemistry
biology
fabrication

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Control of Apex Shape of the Fiber Probe Employed in Photon Scanning Tunneling Microscope by a Multistep Etching Method. / Umamaheswari, Rajagopalan; Mononobe, Shuji; Ohtsu, Motoichi; Ohtsu, Motoichi.

In: Journal of Lightwave Technology, Vol. 13, No. 12, 01.01.1995, p. 2308-2313.

Research output: Contribution to journalArticle

@article{7cd4108ebcca4907aa9c9e6b8f9d3c09,
title = "Control of Apex Shape of the Fiber Probe Employed in Photon Scanning Tunneling Microscope by a Multistep Etching Method",
abstract = "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.",
author = "Rajagopalan Umamaheswari and Shuji Mononobe and Motoichi Ohtsu and Motoichi Ohtsu",
year = "1995",
month = "1",
day = "1",
doi = "10.1109/50.475568",
language = "English",
volume = "13",
pages = "2308--2313",
journal = "Journal of Lightwave Technology",
issn = "0733-8724",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "12",

}

TY - JOUR

T1 - Control of Apex Shape of the Fiber Probe Employed in Photon Scanning Tunneling Microscope by a Multistep Etching Method

AU - Umamaheswari, Rajagopalan

AU - Mononobe, Shuji

AU - Ohtsu, Motoichi

AU - Ohtsu, Motoichi

PY - 1995/1/1

Y1 - 1995/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0029520939&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029520939&partnerID=8YFLogxK

U2 - 10.1109/50.475568

DO - 10.1109/50.475568

M3 - Article

AN - SCOPUS:0029520939

VL - 13

SP - 2308

EP - 2313

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

SN - 0733-8724

IS - 12

ER -