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Charge transport in various dimensions of small networks composed of gold nanoparticles and terthiophene wire-molecules Noguchi Yutaka, Terui Toshifumi, Katayama Takuya, Matsushita Michio M, Sugawara Tadashi We report the charge transport properties of networks composed of several to tens of gold nanoparticles (GNPs) linked by dithiolated terthiophene (3T) molecules. A large activation energy was observed for the conductance of networks with lesser dimensions. This bahavior is explained in terms of the charging energy of the GNPs in the current path. The Efros-Shklovskii variable range hopping model [A. L. Efros and B. I. Shklovskii, J. Phys. C 8, L49 (1975)] qualitatively describes the transport properties, where the dimensionality of the network and the small tunneling resistance of 3T serve as important factors.
doi:10.1063/1.3605598 |