Molecular nano-junctions formed with different metallic electrodes

Nikolai B. Zhitenev, Artur Erbe, Zhenan Bao, Weirong Jiang, Eric Garfunkel

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Conductance of nanoscale junctions consisting of a molecular monolayer in contact with different metal electrodes is studied. The characteristic energy scales of conductance are determined from the temperature dependence and from the non-linear current-voltage characteristics. Conductance measured at small bias follows Arrhenius behaviour. The effective activation energies are dependent on the metal contacts. The activation energies, typically in the range of 5-150 meV, are small compared to the expected molecular energy level spacings. The nature of the low-energy states remains unclear; however, some mechanisms, such as doping of the molecular layer by metal atoms, can be excluded. For certain metal pairs, the energies extracted from the onset of the non-linearity correspond to the low-bias activation energies, while for other metals this is not observed. These differences are probably caused by the differences in the relative topography of metal electrodes defining the effective conducting paths through the molecular layer.

Original languageEnglish
Pages (from-to)495-500
Number of pages6
JournalNanotechnology
Volume16
Issue number4
DOIs
Publication statusPublished - Apr 2005

Fingerprint

Metals
Electrodes
electrodes
metals
Activation energy
activation energy
Electron energy levels
molecular energy levels
Current voltage characteristics
Topography
energy
electric contacts
Monolayers
topography
nonlinearity
Doping (additives)
spacing
conduction
Atoms
temperature dependence

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Molecular nano-junctions formed with different metallic electrodes. / Zhitenev, Nikolai B.; Erbe, Artur; Bao, Zhenan; Jiang, Weirong; Garfunkel, Eric.

In: Nanotechnology, Vol. 16, No. 4, 04.2005, p. 495-500.

Research output: Contribution to journalArticle

Zhitenev, Nikolai B. ; Erbe, Artur ; Bao, Zhenan ; Jiang, Weirong ; Garfunkel, Eric. / Molecular nano-junctions formed with different metallic electrodes. In: Nanotechnology. 2005 ; Vol. 16, No. 4. pp. 495-500.
@article{963260f70cbd44a28bb22de7d2939bdf,
title = "Molecular nano-junctions formed with different metallic electrodes",
abstract = "Conductance of nanoscale junctions consisting of a molecular monolayer in contact with different metal electrodes is studied. The characteristic energy scales of conductance are determined from the temperature dependence and from the non-linear current-voltage characteristics. Conductance measured at small bias follows Arrhenius behaviour. The effective activation energies are dependent on the metal contacts. The activation energies, typically in the range of 5-150 meV, are small compared to the expected molecular energy level spacings. The nature of the low-energy states remains unclear; however, some mechanisms, such as doping of the molecular layer by metal atoms, can be excluded. For certain metal pairs, the energies extracted from the onset of the non-linearity correspond to the low-bias activation energies, while for other metals this is not observed. These differences are probably caused by the differences in the relative topography of metal electrodes defining the effective conducting paths through the molecular layer.",
author = "Zhitenev, {Nikolai B.} and Artur Erbe and Zhenan Bao and Weirong Jiang and Eric Garfunkel",
year = "2005",
month = "4",
doi = "10.1088/0957-4484/16/4/027",
language = "English",
volume = "16",
pages = "495--500",
journal = "Nanotechnology",
issn = "0957-4484",
publisher = "IOP Publishing Ltd.",
number = "4",

}

TY - JOUR

T1 - Molecular nano-junctions formed with different metallic electrodes

AU - Zhitenev, Nikolai B.

AU - Erbe, Artur

AU - Bao, Zhenan

AU - Jiang, Weirong

AU - Garfunkel, Eric

PY - 2005/4

Y1 - 2005/4

N2 - Conductance of nanoscale junctions consisting of a molecular monolayer in contact with different metal electrodes is studied. The characteristic energy scales of conductance are determined from the temperature dependence and from the non-linear current-voltage characteristics. Conductance measured at small bias follows Arrhenius behaviour. The effective activation energies are dependent on the metal contacts. The activation energies, typically in the range of 5-150 meV, are small compared to the expected molecular energy level spacings. The nature of the low-energy states remains unclear; however, some mechanisms, such as doping of the molecular layer by metal atoms, can be excluded. For certain metal pairs, the energies extracted from the onset of the non-linearity correspond to the low-bias activation energies, while for other metals this is not observed. These differences are probably caused by the differences in the relative topography of metal electrodes defining the effective conducting paths through the molecular layer.

AB - Conductance of nanoscale junctions consisting of a molecular monolayer in contact with different metal electrodes is studied. The characteristic energy scales of conductance are determined from the temperature dependence and from the non-linear current-voltage characteristics. Conductance measured at small bias follows Arrhenius behaviour. The effective activation energies are dependent on the metal contacts. The activation energies, typically in the range of 5-150 meV, are small compared to the expected molecular energy level spacings. The nature of the low-energy states remains unclear; however, some mechanisms, such as doping of the molecular layer by metal atoms, can be excluded. For certain metal pairs, the energies extracted from the onset of the non-linearity correspond to the low-bias activation energies, while for other metals this is not observed. These differences are probably caused by the differences in the relative topography of metal electrodes defining the effective conducting paths through the molecular layer.

UR - http://www.scopus.com/inward/record.url?scp=24144476930&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24144476930&partnerID=8YFLogxK

U2 - 10.1088/0957-4484/16/4/027

DO - 10.1088/0957-4484/16/4/027

M3 - Article

AN - SCOPUS:24144476930

VL - 16

SP - 495

EP - 500

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 4

ER -