Single molecule conductance through rigid norbornylogous bridges with zero average curvature
Yang, Wenrong R., Jones, Michael W., Li, Xiulan, Eggers, Paul K., Tao, Nongjian, Gooding, J. Justin and Paddon-Row, Michael N. 2008, Single molecule conductance through rigid norbornylogous bridges with zero average curvature, Journal of physical chemistry Part C : nanomaterials and interfaces, vol. 112, no. 24, pp. 9072-9080, doi: 10.1021/jp802328b.
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Title
Single molecule conductance through rigid norbornylogous bridges with zero average curvature
Journal of physical chemistry Part C : nanomaterials and interfaces
Volume number
112
Issue number
24
Start page
9072
End page
9080
Total pages
9
Publisher
American Chemical Society
Place of publication
Washington, D.C.
Publication date
2008-06-19
ISSN
1932-7447 1932-7455
Summary
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.
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