Molecular wire junctions: Tuning the conductance

Vladimiro Mujica; Abraham Nitzan; Supriyo Datta; Mark A. Ratner; C. P. Kubiak

doi:10.1021/jp0216427

Molecular wire junctions: Tuning the conductance

Vladimiro Mujica, Abraham Nitzan, Supriyo Datta, Mark A. Ratner, C. P. Kubiak

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

56 Scopus citations

Abstract

Junctions consisting of two electrodes and a single molecule acting as a wire can be investigated by scanning probe conductance measurements. The conductance for low temperature, short wire structures can be characterized by the elastic scattering of the electrons, as described by general Landauer formulas. Tuning the bridge energy levels either by field effect transistor (FET)-like behavior (charging) or by chemical bond formation can raise or lower the conductance by moving the poles of the molecular Green's function. For small molecular structures with particular HOMO/LUMO characteristics, functionalization might be a more effective means than Coulomb charging by external gates.

Original language	English (US)
Pages (from-to)	91-95
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	107
Issue number	1
DOIs	https://doi.org/10.1021/jp0216427
State	Published - Jan 9 2003
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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AU - Nitzan, Abraham

AU - Datta, Supriyo

AU - Ratner, Mark A.

AU - Kubiak, C. P.

PY - 2003/1/9

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AB - Junctions consisting of two electrodes and a single molecule acting as a wire can be investigated by scanning probe conductance measurements. The conductance for low temperature, short wire structures can be characterized by the elastic scattering of the electrons, as described by general Landauer formulas. Tuning the bridge energy levels either by field effect transistor (FET)-like behavior (charging) or by chemical bond formation can raise or lower the conductance by moving the poles of the molecular Green's function. For small molecular structures with particular HOMO/LUMO characteristics, functionalization might be a more effective means than Coulomb charging by external gates.

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Molecular wire junctions: Tuning the conductance

Abstract

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