Journal article
Triazatriangulene as binding group for molecular electronics
University of Copenhagen1
Department of Micro- and Nanotechnology, Technical University of Denmark2
Self-Organized Nanoporous Materials, Department of Micro- and Nanotechnology, Technical University of Denmark3
Chinese Academy of Sciences4
Department of Chemistry, Technical University of Denmark5
NanoChemistry, Department of Chemistry, Technical University of Denmark6
The triazatriangulene (TATA) ring system was investigated as a binding group for tunnel junctions of molecular wires on gold surfaces. Self-assembled monolayers (SAMs) of TATA platforms with three different lengths of phenylene wires were fabricated, and their electrical conductance was recorded by both conducting probe-atomic force microscopy (CP-AFM) and scanning tunneling microscopy (STM).
Similar measurements were performed for phenylene SAMs with thiol anchoring groups as references. It was found that, despite the presence of a sp3 hybridized carbon atom in the conduction path, the TATA platform displays a contact resistance only slightly larger than the thiols. This surprising finding has not been reported before and was analyzed by theoretical computations of the transmission functions of the TATA anchored molecular wires.
The relatively low contact resistance of the TATA platform along with its high stability and directionality make this binding group very attractive for molecular electronic measurements and devices. (Figure Presented).
Language: | English |
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Year: | 2014 |
Pages: | 14868-14876 |
ISSN: | 15205827 and 07437463 |
Types: | Journal article |
DOI: | 10.1021/la504056v |
ORCIDs: | 0000-0003-4329-5649 , 0000-0002-0659-5936 , 0000-0002-2018-1529 , 0000-0002-8908-1657 , 0000-0002-7784-7985 , 0000-0002-1120-3191 and Chi, Qijin |