Deakin University
Browse

File(s) under permanent embargo

Single molecule conductance through rigid norbornylogous bridges with zero average curvature

journal contribution
posted on 2008-06-19, 00:00 authored by Wenrong YangWenrong Yang, M Jones, X Li, P Eggers, N Tao, J Gooding, M Paddon-Row
A new homologous series of norbornylogous (NB) bridges has been synthesized in which the average curvature of the bridges is very small. The molecules are rigid and have two thiol moieties at each end to allow them to form self-assembled monolayers (SAMs) and to connect to two gold electrodes to form a molecular junction. The SAMs formed were characterized using electrochemistry to determine the surface coverage of molecules on gold surface and to provide an indication of the packing of the NB bridges while ellipsometry and X-ray photoelectron spectroscopy (XPS) were used to provide an indication of the SAM thickness and orientation. Single molecule conductance of NB bridges was measured as a function of the molecular length. The conductance was found to decrease exponentially with the length with a decay constant that is exactly correlated with photoelectron transfer and other studies at the multiple molecule level. The molecule−electrode contact resistance was determined and compared with that of related alkanedithiol molecular junctions.

History

Journal

Journal of physical chemistry Part C : nanomaterials and interfaces

Volume

112

Issue

24

Pagination

9072 - 9080

Publisher

American Chemical Society

Location

Washington, D.C.

ISSN

1932-7447

eISSN

1932-7455

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2008, American Chemical Society