Dynamics of oligo(phenylene-ethynylene) self-assembled monolayers on Au(111)

Hairong Wu; Kai Sotthewes; Alejandro Mendez-Ardoy; Tibor Kudernac; Jurriaan Huskens; Aufried Lenferink; Cees Otto; Peter M. Schon; G. Julius Vancso; Harold J. W. Zandvliet

doi:10.1016/j.cplett.2014.09.007

Dynamics of oligo(phenylene-ethynylene) self-assembled monolayers on Au(111)

Hairong Wu, Kai Sotthewes, Alejandro Mendez-Ardoy, Tibor Kudernac, Jurriaan Huskens, Aufried Lenferink, Cees Otto, Peter M. Schon, G. Julius Vancso, Harold J. W. Zandvliet^*

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Oligo(phenylene-ethynylene), self-assembled monolayers on Au(1 1 1) have been studied with scanning tunneling microscopy. The oligo(phenylene-ethynylene) molecules are adsorbed in a flat-lying orientation. Time-resolved scanning tunneling microscopy measurements reveal that the molecules continuously switch back and forth between two nearly degenerate configurations. The energy difference between the two configurations is 22 +/- 5 meV and the activation barrier for the transition from the low-energy configuration to the high-energy configuration is 0.65 +/- 0.03 eV. A statistical analysis of the residence times revealed that the switching process is stochastic. We propose that the two level switching is due to a torsional mode of the central phenyl ring. (C) 2014 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	45-48
Number of pages	4
Journal	Chemical Physics Letters
Volume	614
DOIs	https://doi.org/10.1016/j.cplett.2014.09.007
Publication status	Published - 20-Oct-2014
Externally published	Yes

Keywords

CONTROLLED CONDUCTANCE
TRANSPORT
ALKANETHIOLS
MOLECULES
MECHANISM
GOLD

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Dynamics of oligo(phenylene-ethynylene) self-assembled monolayers on Au(1 1 1)
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@article{5a61d3753cda4c3491aa2519f97153f9,

title = "Dynamics of oligo(phenylene-ethynylene) self-assembled monolayers on Au(111)",

abstract = "Oligo(phenylene-ethynylene), self-assembled monolayers on Au(1 1 1) have been studied with scanning tunneling microscopy. The oligo(phenylene-ethynylene) molecules are adsorbed in a flat-lying orientation. Time-resolved scanning tunneling microscopy measurements reveal that the molecules continuously switch back and forth between two nearly degenerate configurations. The energy difference between the two configurations is 22 +/- 5 meV and the activation barrier for the transition from the low-energy configuration to the high-energy configuration is 0.65 +/- 0.03 eV. A statistical analysis of the residence times revealed that the switching process is stochastic. We propose that the two level switching is due to a torsional mode of the central phenyl ring. (C) 2014 Elsevier B.V. All rights reserved.",

keywords = "CONTROLLED CONDUCTANCE, TRANSPORT, ALKANETHIOLS, MOLECULES, MECHANISM, GOLD",

author = "Hairong Wu and Kai Sotthewes and Alejandro Mendez-Ardoy and Tibor Kudernac and Jurriaan Huskens and Aufried Lenferink and Cees Otto and Schon, {Peter M.} and Vancso, {G. Julius} and Zandvliet, {Harold J. W.}",

year = "2014",

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doi = "10.1016/j.cplett.2014.09.007",

language = "English",

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T1 - Dynamics of oligo(phenylene-ethynylene) self-assembled monolayers on Au(111)

AU - Wu, Hairong

AU - Sotthewes, Kai

AU - Mendez-Ardoy, Alejandro

AU - Kudernac, Tibor

AU - Huskens, Jurriaan

AU - Lenferink, Aufried

AU - Otto, Cees

AU - Schon, Peter M.

AU - Vancso, G. Julius

AU - Zandvliet, Harold J. W.

PY - 2014/10/20

Y1 - 2014/10/20

N2 - Oligo(phenylene-ethynylene), self-assembled monolayers on Au(1 1 1) have been studied with scanning tunneling microscopy. The oligo(phenylene-ethynylene) molecules are adsorbed in a flat-lying orientation. Time-resolved scanning tunneling microscopy measurements reveal that the molecules continuously switch back and forth between two nearly degenerate configurations. The energy difference between the two configurations is 22 +/- 5 meV and the activation barrier for the transition from the low-energy configuration to the high-energy configuration is 0.65 +/- 0.03 eV. A statistical analysis of the residence times revealed that the switching process is stochastic. We propose that the two level switching is due to a torsional mode of the central phenyl ring. (C) 2014 Elsevier B.V. All rights reserved.

AB - Oligo(phenylene-ethynylene), self-assembled monolayers on Au(1 1 1) have been studied with scanning tunneling microscopy. The oligo(phenylene-ethynylene) molecules are adsorbed in a flat-lying orientation. Time-resolved scanning tunneling microscopy measurements reveal that the molecules continuously switch back and forth between two nearly degenerate configurations. The energy difference between the two configurations is 22 +/- 5 meV and the activation barrier for the transition from the low-energy configuration to the high-energy configuration is 0.65 +/- 0.03 eV. A statistical analysis of the residence times revealed that the switching process is stochastic. We propose that the two level switching is due to a torsional mode of the central phenyl ring. (C) 2014 Elsevier B.V. All rights reserved.

KW - CONTROLLED CONDUCTANCE

KW - TRANSPORT

KW - ALKANETHIOLS

KW - MOLECULES

KW - MECHANISM

KW - GOLD

U2 - 10.1016/j.cplett.2014.09.007

DO - 10.1016/j.cplett.2014.09.007

M3 - Article

SN - 0009-2614

VL - 614

SP - 45

EP - 48

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -