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

被引：6

作者：

Wu, Hairong ^{[1
]}

Sotthewes, Kai ^{[1
]}

Mendez-Ardoy, Alejandro ^{[1
]}

Kudernac, Tibor ^{[1
]}

Huskens, Jurriaan ^{[1
]}

Lenferink, Aufried ^{[2
]}

Otto, Cees ^{[2
]}

Schon, Peter M. ^{[1
]}

Vancso, G. Julius ^{[1
]}

Zandvliet, Harold J. W. ^{[1
]}

机构：

[1] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, Med Cell Biophys Grp, NL-7500 AE Enschede, Netherlands

来源：

CHEMICAL PHYSICS LETTERS | 2014年 / 614卷

关键词：

CONTROLLED CONDUCTANCE; TRANSPORT; ALKANETHIOLS; MOLECULES; MECHANISM; GOLD;

D O I：

10.1016/j.cplett.2014.09.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：45 / 48

页数：4

共 33 条

[1] Molecularly inherent voltage-controlled conductance switching [J].

Blum, AS ;

Kushmerick, JG ;

Long, DP ;

Patterson, CH ;

Yang, JC ;

Henderson, JC ;

Yao, YX ;

Tour, JM ;

Shashidhar, R ;

Ratna, BR .

NATURE MATERIALS, 2005, 4 (02) :167-172

[2] Redox-Active π-Conjugated Organometallic Mono layers: Pronounced Coulomb Blockade Characteristic at Room Temperature [J].

Chen, Chiao-Pei ;

Luo, Wan-Rou ;

Chen, Chen-Ni ;

Wu, Shin-Mou ;

Hsieh, Shuchen ;

Chiang, Chao-Ming ;

Dong, Teng-Yuan .

LANGMUIR, 2013, 29 (09) :3106-3115

[3] Topography and transport properties of oligo(phenylene ethynylene) molecular wires studied by scanning tunneling microscopy [J].

Dholakia, GR ;

Fan, W ;

Koehne, J ;

Han, J ;

Meyyappan, M .

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2003, 3 (03) :231-234

[4] Conductance switching in single molecules through conformational changes [J].

Donhauser, ZJ ;

Mantooth, BA ;

Kelly, KF ;

Bumm, LA ;

Monnell, JD ;

Stapleton, JJ ;

Price, DW ;

Rawlett, AM ;

Allara, DL ;

Tour, JM ;

Weiss, PS .

SCIENCE, 2001, 292 (5525) :2303-2307

[5] Self-assembled monolayers of aromatic thiols stabilized by parallel-displaced π-π stacking interactions [J].

Dou, RF ;

Ma, XC ;

Xi, L ;

Yip, HL ;

Wong, KY ;

Lau, WM ;

Jia, JF ;

Xue, QK ;

Yang, WS ;

Ma, H ;

Jen, AKY .

LANGMUIR, 2006, 22 (07) :3049-3056

[6] SYNTHESIS, STRUCTURE, AND PROPERTIES OF MODEL ORGANIC-SURFACES [J].

DUBOIS, LH ;

NUZZO, RG .

ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 1992, 43 :437-463

[7] FORMATION OF SELF-ASSEMBLED MONOLAYERS OF N-ALKANETHIOLS ON GOLD - A SCANNING TUNNELING MICROSCOPY STUDY ON THE MODIFICATION OF SUBSTRATE MORPHOLOGY [J].

EDINGER, K ;

GOLZHAUSER, A ;

DEMOTA, K ;

WOLL, C ;

GRUNZE, M .

LANGMUIR, 1993, 9 (01) :4-8

[8] Dynamics or stochastic conductance switching of phenylene-ethynylene oligomers? [J].

Hallback, Ann-Sofie ;

Poelsema, Bene ;

Zandvliet, Harold J. W. .

CHEMPHYSCHEM, 2007, 8 (05) :661-665

[9] ON THE ELECTROCHEMICAL ETCHING OF TIPS FOR SCANNING TUNNELING MICROSCOPY [J].

IBE, JP ;

BEY, PP ;

BRANDOW, SL ;

BRIZZOLARA, RA ;

BURNHAM, NA ;

DILELLA, DP ;

LEE, KP ;

MARRIAN, CRK ;

COLTON, RJ .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1990, 8 (04) :3570-3575

[10] Current-driven oscillations and time-dependent transport in nanojunctions [J].

Kaun, CC ;

Seideman, T .

PHYSICAL REVIEW LETTERS, 2005, 94 (22)

← 1 2 3 4 →