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

Hairong Wu; Kai Sotthewes; Alejandro Méndez-Ardoy; Tibor Kudernac; Jurriaan Huskens; Aufrid Lenferink; Cees Otto; Peter M. Schön; 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 Méndez-Ardoy, Tibor Kudernac, Jurriaan Huskens, Aufrid Lenferink, Cees Otto, Peter M. Schön, G. Julius Vancso, Harold J.W. Zandvliet

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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.

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 - 2014

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2023 OA procedure

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10.1016/j.cplett.2014.09.007

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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.",

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author = "Hairong Wu and Kai Sotthewes and Alejandro M{\'e}ndez-Ardoy and Tibor Kudernac and Jurriaan Huskens and Aufrid Lenferink and Cees Otto and Sch{\"o}n, {Peter M.} and Vancso, {G. Julius} and Zandvliet, {Harold J.W.}",

year = "2014",

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

language = "English",

volume = "614",

pages = "45--48",

journal = "Chemical physics letters",

issn = "0009-2614",

publisher = "Elsevier B.V.",

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TY - JOUR

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

AU - Wu, Hairong

AU - Sotthewes, Kai

AU - Méndez-Ardoy, Alejandro

AU - Kudernac, Tibor

AU - Huskens, Jurriaan

AU - Lenferink, Aufrid

AU - Otto, Cees

AU - Schön, Peter M.

AU - Vancso, G. Julius

AU - Zandvliet, Harold J.W.

PY - 2014

Y1 - 2014

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.

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.

KW - 2023 OA procedure

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 -

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

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