Dynamics or Stochastic Conductance Switching of Phenylene-Ethynylene Oligomers?

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Scanning tunneling microscopy (STM) studies of phenylene-ethynylene oligomers inserted in alkanethiolate self assembled monolayers (SAMs) are presented. Spontaneous changes in appearance of bundles of inserted molecules during imaging are observed. The results indicate that the appearance changes are caused by fluctuations of the number of molecules in the bundles, by diffusion and exchange of molecules, in contrast to previous reports which attribute the changes to stochastic conductance switching. The packing density of the SAM around the bundles of inserted molecules influence the fluctuations, as the fluctuations observed at 77 K all take place in bundles inserted at locally less-densely packed SAM areas. At room temperature fluctuations of bundles inserted in well-ordered areas are also observed.
Original languageUndefined
Pages (from-to)661-665
Number of pages5
JournalChemPhysChem
Volume8
Issue number5
DOIs
Publication statusPublished - 2007

Keywords

  • METIS-239915
  • Gold
  • Scanning probe microscopy
  • Self-assembled monolayers
  • Molecular electronics
  • IR-72256

Cite this

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title = "Dynamics or Stochastic Conductance Switching of Phenylene-Ethynylene Oligomers?",
abstract = "Scanning tunneling microscopy (STM) studies of phenylene-ethynylene oligomers inserted in alkanethiolate self assembled monolayers (SAMs) are presented. Spontaneous changes in appearance of bundles of inserted molecules during imaging are observed. The results indicate that the appearance changes are caused by fluctuations of the number of molecules in the bundles, by diffusion and exchange of molecules, in contrast to previous reports which attribute the changes to stochastic conductance switching. The packing density of the SAM around the bundles of inserted molecules influence the fluctuations, as the fluctuations observed at 77 K all take place in bundles inserted at locally less-densely packed SAM areas. At room temperature fluctuations of bundles inserted in well-ordered areas are also observed.",
keywords = "METIS-239915, Gold, Scanning probe microscopy, Self-assembled monolayers, Molecular electronics, IR-72256",
author = "A.S.V.M. Hallb{\"a}ck and Bene Poelsema and Zandvliet, {Henricus J.W.}",
year = "2007",
doi = "10.1002/cphc.200600744",
language = "Undefined",
volume = "8",
pages = "661--665",
journal = "ChemPhysChem",
issn = "1439-4235",
publisher = "Wiley-VCH Verlag",
number = "5",

}

Dynamics or Stochastic Conductance Switching of Phenylene-Ethynylene Oligomers? / Hallbäck, A.S.V.M.; Poelsema, Bene; Zandvliet, Henricus J.W.

In: ChemPhysChem, Vol. 8, No. 5, 2007, p. 661-665.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Dynamics or Stochastic Conductance Switching of Phenylene-Ethynylene Oligomers?

AU - Hallbäck, A.S.V.M.

AU - Poelsema, Bene

AU - Zandvliet, Henricus J.W.

PY - 2007

Y1 - 2007

N2 - Scanning tunneling microscopy (STM) studies of phenylene-ethynylene oligomers inserted in alkanethiolate self assembled monolayers (SAMs) are presented. Spontaneous changes in appearance of bundles of inserted molecules during imaging are observed. The results indicate that the appearance changes are caused by fluctuations of the number of molecules in the bundles, by diffusion and exchange of molecules, in contrast to previous reports which attribute the changes to stochastic conductance switching. The packing density of the SAM around the bundles of inserted molecules influence the fluctuations, as the fluctuations observed at 77 K all take place in bundles inserted at locally less-densely packed SAM areas. At room temperature fluctuations of bundles inserted in well-ordered areas are also observed.

AB - Scanning tunneling microscopy (STM) studies of phenylene-ethynylene oligomers inserted in alkanethiolate self assembled monolayers (SAMs) are presented. Spontaneous changes in appearance of bundles of inserted molecules during imaging are observed. The results indicate that the appearance changes are caused by fluctuations of the number of molecules in the bundles, by diffusion and exchange of molecules, in contrast to previous reports which attribute the changes to stochastic conductance switching. The packing density of the SAM around the bundles of inserted molecules influence the fluctuations, as the fluctuations observed at 77 K all take place in bundles inserted at locally less-densely packed SAM areas. At room temperature fluctuations of bundles inserted in well-ordered areas are also observed.

KW - METIS-239915

KW - Gold

KW - Scanning probe microscopy

KW - Self-assembled monolayers

KW - Molecular electronics

KW - IR-72256

U2 - 10.1002/cphc.200600744

DO - 10.1002/cphc.200600744

M3 - Article

VL - 8

SP - 661

EP - 665

JO - ChemPhysChem

JF - ChemPhysChem

SN - 1439-4235

IS - 5

ER -