Electromechanical and conductance switching properties of single oligothiophene molecules

Bingqian Q. Xu, Xiulan L. Li, Xiaoyin Y. Xiao, Hiroshi Sakaguchi, Nongjian Tao

Research output: Contribution to journalArticle

153 Citations (Scopus)

Abstract

We have studied the electron transport and electromechanical properties of single oligothiophenes with three and four thiophene repeating units covalently linked to two Au electrodes. The four-repeating unit molecule is found to be more conductive than the three-repeating unit molecule. This unusual length dependence is due to the different electronic states of the molecules. Both molecules can be switched reversibly between a high and low conducting state by oxidizing and reducing the molecules using an electrochemical gate. The conductance of the molecules decreases upon stretching, which is attributed to a force-induced increase in the HOMO-LUMO gap.

Original languageEnglish (US)
Pages (from-to)1491-1495
Number of pages5
JournalNano Letters
Volume5
Issue number7
DOIs
StatePublished - Jul 2005

Fingerprint

Molecules
molecules
Thiophenes
Electronic states
Thiophene
thiophenes
Stretching
transport properties
conduction
Electrodes
electrodes
electronics
electrons

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Chemistry (miscellaneous)

Cite this

Electromechanical and conductance switching properties of single oligothiophene molecules. / Xu, Bingqian Q.; Li, Xiulan L.; Xiao, Xiaoyin Y.; Sakaguchi, Hiroshi; Tao, Nongjian.

In: Nano Letters, Vol. 5, No. 7, 07.2005, p. 1491-1495.

Research output: Contribution to journalArticle

Xu, Bingqian Q. ; Li, Xiulan L. ; Xiao, Xiaoyin Y. ; Sakaguchi, Hiroshi ; Tao, Nongjian. / Electromechanical and conductance switching properties of single oligothiophene molecules. In: Nano Letters. 2005 ; Vol. 5, No. 7. pp. 1491-1495.
@article{8679da29b51f4f088f2d141d18089bc9,
title = "Electromechanical and conductance switching properties of single oligothiophene molecules",
abstract = "We have studied the electron transport and electromechanical properties of single oligothiophenes with three and four thiophene repeating units covalently linked to two Au electrodes. The four-repeating unit molecule is found to be more conductive than the three-repeating unit molecule. This unusual length dependence is due to the different electronic states of the molecules. Both molecules can be switched reversibly between a high and low conducting state by oxidizing and reducing the molecules using an electrochemical gate. The conductance of the molecules decreases upon stretching, which is attributed to a force-induced increase in the HOMO-LUMO gap.",
author = "Xu, {Bingqian Q.} and Li, {Xiulan L.} and Xiao, {Xiaoyin Y.} and Hiroshi Sakaguchi and Nongjian Tao",
year = "2005",
month = "7",
doi = "10.1021/nl050860j",
language = "English (US)",
volume = "5",
pages = "1491--1495",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "7",

}

TY - JOUR

T1 - Electromechanical and conductance switching properties of single oligothiophene molecules

AU - Xu, Bingqian Q.

AU - Li, Xiulan L.

AU - Xiao, Xiaoyin Y.

AU - Sakaguchi, Hiroshi

AU - Tao, Nongjian

PY - 2005/7

Y1 - 2005/7

N2 - We have studied the electron transport and electromechanical properties of single oligothiophenes with three and four thiophene repeating units covalently linked to two Au electrodes. The four-repeating unit molecule is found to be more conductive than the three-repeating unit molecule. This unusual length dependence is due to the different electronic states of the molecules. Both molecules can be switched reversibly between a high and low conducting state by oxidizing and reducing the molecules using an electrochemical gate. The conductance of the molecules decreases upon stretching, which is attributed to a force-induced increase in the HOMO-LUMO gap.

AB - We have studied the electron transport and electromechanical properties of single oligothiophenes with three and four thiophene repeating units covalently linked to two Au electrodes. The four-repeating unit molecule is found to be more conductive than the three-repeating unit molecule. This unusual length dependence is due to the different electronic states of the molecules. Both molecules can be switched reversibly between a high and low conducting state by oxidizing and reducing the molecules using an electrochemical gate. The conductance of the molecules decreases upon stretching, which is attributed to a force-induced increase in the HOMO-LUMO gap.

UR - http://www.scopus.com/inward/record.url?scp=23144456423&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23144456423&partnerID=8YFLogxK

U2 - 10.1021/nl050860j

DO - 10.1021/nl050860j

M3 - Article

C2 - 16178263

AN - SCOPUS:23144456423

VL - 5

SP - 1491

EP - 1495

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 7

ER -