Vibrational spectra of metal-molecule-metal junctions in electromigrated nanogap electrodes by inelastic electron tunneling

Hyunwook Song; Youngsang Kim; Jamin Ku; Yun Hee Jang; Heejun Jeong; Takhee Lee

doi:10.1063/1.3097217

Vibrational spectra of metal-molecule-metal junctions in electromigrated nanogap electrodes by inelastic electron tunneling

Hyunwook Song, Youngsang Kim, Jamin Ku, Yun Hee Jang, Heejun Jeong, Takhee Lee

Department of Energy and Science and Engineering

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

We measure the vibrational signatures of metal-molecule-metal junctions formed from 1,8-octanedithiol and 1,4-benzenedithiol incorporated into electromigrated nanogap electrodes using inelastic electron tunneling spectroscopy (IETS). The junction conductance measured suggests that the IETS spectra have been achieved at the individual molecule level. The IETS spectra provide unambiguous experimental evidence of the existence of the component molecules in the fabricated nanogap electrode testbeds. The intense Au-S stretch peaks elucidate that the thiol anchor group is linked to the broken Au wires during electromigration, thus creating reliable electrical contact to individual molecules.

Original language	English
Article number	103110
Journal	Applied Physics Letters
Volume	94
Issue number	10
DOIs	https://doi.org/10.1063/1.3097217
State	Published - 2009

Bibliographical note

Funding Information:
This work was supported by the National Research Laboratory (NRL) Program of the Korea Science and Engineering Foundation (KOSEF) and the Program for Integrated Molecular System at GIST. H.J. acknowledges the support of the Korea Research Foundation Grant funded by the Korean Government (Grant No. KRF-2008-331-C00107).

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title = "Vibrational spectra of metal-molecule-metal junctions in electromigrated nanogap electrodes by inelastic electron tunneling",

abstract = "We measure the vibrational signatures of metal-molecule-metal junctions formed from 1,8-octanedithiol and 1,4-benzenedithiol incorporated into electromigrated nanogap electrodes using inelastic electron tunneling spectroscopy (IETS). The junction conductance measured suggests that the IETS spectra have been achieved at the individual molecule level. The IETS spectra provide unambiguous experimental evidence of the existence of the component molecules in the fabricated nanogap electrode testbeds. The intense Au-S stretch peaks elucidate that the thiol anchor group is linked to the broken Au wires during electromigration, thus creating reliable electrical contact to individual molecules.",

author = "Hyunwook Song and Youngsang Kim and Jamin Ku and Jang, {Yun Hee} and Heejun Jeong and Takhee Lee",

note = "Funding Information: This work was supported by the National Research Laboratory (NRL) Program of the Korea Science and Engineering Foundation (KOSEF) and the Program for Integrated Molecular System at GIST. H.J. acknowledges the support of the Korea Research Foundation Grant funded by the Korean Government (Grant No. KRF-2008-331-C00107).",

year = "2009",

doi = "10.1063/1.3097217",

language = "English",

volume = "94",

journal = "Applied Physics Letters",

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T1 - Vibrational spectra of metal-molecule-metal junctions in electromigrated nanogap electrodes by inelastic electron tunneling

AU - Song, Hyunwook

AU - Kim, Youngsang

AU - Ku, Jamin

AU - Jang, Yun Hee

AU - Jeong, Heejun

AU - Lee, Takhee

N1 - Funding Information: This work was supported by the National Research Laboratory (NRL) Program of the Korea Science and Engineering Foundation (KOSEF) and the Program for Integrated Molecular System at GIST. H.J. acknowledges the support of the Korea Research Foundation Grant funded by the Korean Government (Grant No. KRF-2008-331-C00107).

PY - 2009

Y1 - 2009

N2 - We measure the vibrational signatures of metal-molecule-metal junctions formed from 1,8-octanedithiol and 1,4-benzenedithiol incorporated into electromigrated nanogap electrodes using inelastic electron tunneling spectroscopy (IETS). The junction conductance measured suggests that the IETS spectra have been achieved at the individual molecule level. The IETS spectra provide unambiguous experimental evidence of the existence of the component molecules in the fabricated nanogap electrode testbeds. The intense Au-S stretch peaks elucidate that the thiol anchor group is linked to the broken Au wires during electromigration, thus creating reliable electrical contact to individual molecules.

AB - We measure the vibrational signatures of metal-molecule-metal junctions formed from 1,8-octanedithiol and 1,4-benzenedithiol incorporated into electromigrated nanogap electrodes using inelastic electron tunneling spectroscopy (IETS). The junction conductance measured suggests that the IETS spectra have been achieved at the individual molecule level. The IETS spectra provide unambiguous experimental evidence of the existence of the component molecules in the fabricated nanogap electrode testbeds. The intense Au-S stretch peaks elucidate that the thiol anchor group is linked to the broken Au wires during electromigration, thus creating reliable electrical contact to individual molecules.

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Vibrational spectra of metal-molecule-metal junctions in electromigrated nanogap electrodes by inelastic electron tunneling

Abstract

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