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Topography and Transport Properties of Oligo(phenylene ethynylene) Molecular Wires Studied by Scanning Tunneling Microscopy

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Abstract:

Conjugated phenylene(ethynylene) molecular wires are of interest as potential candidates for molecular electronic devices. Scanning tunneling microscopic study of the topography and current-voltage (I-V) characteristics of self-assembled monolayers of two types of molecular wires are presented here. The study shows that the topography and I-Vs, for small scan voltages, of the two wires are quite similar and that the electronic and structural changes introduced by the substitution of an electronegative N atom in the central phenyl ring of these wires does not significantly alter the self-assembly or the transport properties.

Keywords: MOLECULAR WIRE; OLIGO PHENYLENE ETHYNYLENE; SELF-ASSEMBLY; STM; TOPOGRAPHY; TRANSPORT PROPERTIES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2003.188

Publication date: June 1, 2003

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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