期刊
NANO LETTERS
卷 11, 期 10, 页码 4107-4112出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl202720y
关键词
Oligothiophene; Langmuir-Blodgett monolayer; current sensing atomic force microscopy; molecular electronics; conduction anisotropy; lateral transport
类别
资金
- Office of Science, Office of Basic Energy Sciences, Materials Science and Engineering of the U.S. Department of Energy [DE-AC02-05CH11231]
- Molecular Foundry, Lawrence Berkeley National Laboratory
Using conducting probe atomic force microscopy (CAFM) we have investigated the electrical conduction properties of monolayer films of a pentathiophene derivative on a SiO(2)/Si-p+ substrate. By a combination of current voltage spectroscopy and current imaging we show that lateral charge transport takes place in the plane of the monolayer via hole injection into the highest occupied molecular orbitals of the pentathiophene unit. Our CAFM data suggest that the conductivity is anisotropic relative to the crystalline directions of the molecular lattice.
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