Nanostructure fabrication using pulsed lasers in combination with a scanning tunneling microscope: Mechanism investigation

Y. F. Lu, Z. H. Mai, Y. W. Zheng, W. D. Song

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Nanostructure fabrication using lasers in combination with a scanning tunneling microscope has been reported in the past several years. Different mechanisms have been discussed for the formation of these nanostructures. However, they are controversial. In this study, we investigated the mechanism of nanostructure fabrication on both gold films and hydrogen-passivated Ge surfaces. Current-distance curves for a gold film and for an H-passivated Ge surface under an electrochemically etched tungsten tip were measured to determine the tip-sample distance. An analytical model was proposed to explain different mechanisms for nanostructure fabrication on gold films and on H-passivated Ge surfaces. Thermal expansion of the tip under laser irradiation was calculated. With comparison between the tip-sample distance and the thermal expansion of the tip, we can determine whether the mechanism is based on optical enhancement or on thermal mechanical indentation.

Original languageEnglish (US)
Pages (from-to)1200-1202
Number of pages3
JournalApplied Physics Letters
Volume76
Issue number9
DOIs
StatePublished - Feb 28 2000

Fingerprint

nanofabrication
pulsed lasers
microscopes
scanning
gold
thermal expansion
indentation
lasers
tungsten
irradiation
augmentation
curves
hydrogen

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Nanostructure fabrication using pulsed lasers in combination with a scanning tunneling microscope : Mechanism investigation. / Lu, Y. F.; Mai, Z. H.; Zheng, Y. W.; Song, W. D.

In: Applied Physics Letters, Vol. 76, No. 9, 28.02.2000, p. 1200-1202.

Research output: Contribution to journalArticle

@article{ce45165c98194135b26e41d3fdef8f59,
title = "Nanostructure fabrication using pulsed lasers in combination with a scanning tunneling microscope: Mechanism investigation",
abstract = "Nanostructure fabrication using lasers in combination with a scanning tunneling microscope has been reported in the past several years. Different mechanisms have been discussed for the formation of these nanostructures. However, they are controversial. In this study, we investigated the mechanism of nanostructure fabrication on both gold films and hydrogen-passivated Ge surfaces. Current-distance curves for a gold film and for an H-passivated Ge surface under an electrochemically etched tungsten tip were measured to determine the tip-sample distance. An analytical model was proposed to explain different mechanisms for nanostructure fabrication on gold films and on H-passivated Ge surfaces. Thermal expansion of the tip under laser irradiation was calculated. With comparison between the tip-sample distance and the thermal expansion of the tip, we can determine whether the mechanism is based on optical enhancement or on thermal mechanical indentation.",
author = "Lu, {Y. F.} and Mai, {Z. H.} and Zheng, {Y. W.} and Song, {W. D.}",
year = "2000",
month = "2",
day = "28",
doi = "10.1063/1.125982",
language = "English (US)",
volume = "76",
pages = "1200--1202",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "9",

}

TY - JOUR

T1 - Nanostructure fabrication using pulsed lasers in combination with a scanning tunneling microscope

T2 - Mechanism investigation

AU - Lu, Y. F.

AU - Mai, Z. H.

AU - Zheng, Y. W.

AU - Song, W. D.

PY - 2000/2/28

Y1 - 2000/2/28

N2 - Nanostructure fabrication using lasers in combination with a scanning tunneling microscope has been reported in the past several years. Different mechanisms have been discussed for the formation of these nanostructures. However, they are controversial. In this study, we investigated the mechanism of nanostructure fabrication on both gold films and hydrogen-passivated Ge surfaces. Current-distance curves for a gold film and for an H-passivated Ge surface under an electrochemically etched tungsten tip were measured to determine the tip-sample distance. An analytical model was proposed to explain different mechanisms for nanostructure fabrication on gold films and on H-passivated Ge surfaces. Thermal expansion of the tip under laser irradiation was calculated. With comparison between the tip-sample distance and the thermal expansion of the tip, we can determine whether the mechanism is based on optical enhancement or on thermal mechanical indentation.

AB - Nanostructure fabrication using lasers in combination with a scanning tunneling microscope has been reported in the past several years. Different mechanisms have been discussed for the formation of these nanostructures. However, they are controversial. In this study, we investigated the mechanism of nanostructure fabrication on both gold films and hydrogen-passivated Ge surfaces. Current-distance curves for a gold film and for an H-passivated Ge surface under an electrochemically etched tungsten tip were measured to determine the tip-sample distance. An analytical model was proposed to explain different mechanisms for nanostructure fabrication on gold films and on H-passivated Ge surfaces. Thermal expansion of the tip under laser irradiation was calculated. With comparison between the tip-sample distance and the thermal expansion of the tip, we can determine whether the mechanism is based on optical enhancement or on thermal mechanical indentation.

UR - http://www.scopus.com/inward/record.url?scp=0001675440&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001675440&partnerID=8YFLogxK

U2 - 10.1063/1.125982

DO - 10.1063/1.125982

M3 - Article

AN - SCOPUS:0001675440

VL - 76

SP - 1200

EP - 1202

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 9

ER -