Tunnelling in alkanes anchored to gold electrodes via amine end groups

Details Tunnelling in alkanes anchored to gold electrodes via amine end groups Tunnelling in alkanes anchored to gold electrodes via amine end groups

2007-06-06

arxiv.org/abs/0706.0835v1

Nanotechnology 18, 424010 (2007)

Physics

Condensed Matter

Materials Science

9 pages, 3 figures, 1 table; to appear in Nanotechnology

Scientific paper

10.1088/0957-4484/18/42/424010

For investigation of electron transport on the nanoscale, a system possessing a simple to interpret electronic structure is composed of alkane chains bridging two electrodes via end groups; to date the majority of experiments and theoretical investigations on such structures have considered thiols bonding to gold electrodes. Recently experiments show that well defined molecular conductances may be resolved if the thiol end groups are replaced by amines. In this theoretical study, we investigate the bonding of amine groups to gold clusters and calculate electron transport across the resulting tunnel junctions. We find very good agreement with recent experiments for alkane diamines and discuss differences with respect to the alkane dithiol system.

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