Collective Charge Fluctuations in Single-Electron Processes on Nano-Networks

Details Collective Charge Fluctuations in Single-Electron Processes on Nano-Networks Collective Charge Fluctuations in Single-Electron Processes on Nano-Networks

2008-11-10

arxiv.org/abs/0811.1527v1

J. Stat. Mech. (2009) P02015

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 7 figures

Scientific paper

10.1088/1742-5468/2009/02/P02015

Using numerical modeling we study emergence of structure and structure-related nonlinear conduction properties in the self-assembled nanoparticle films. Particularly, we show how different nanoparticle networks emerge within assembly processes with molecular bio-recognition binding. We then simulate the charge transport under voltage bias via single-electron tunnelings through the junctions between nanoparticles on such type of networks. We show how the regular nanoparticle array and topologically inhomogeneous nanonetworks affect the charge transport. We find long-range correlations in the time series of charge fluctuation at individual nanoparticles and of flow along the junctions within the network. These correlations explain the occurrence of a large nonlinearity in the simulated and experimentally measured current-voltage characteristics and non-Gaussian fluctuations of the current at the electrode.

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