Abstract
We have bridged a pair of gold electrodes through chains and arrays of gold nanoparticles, coated with citrate molecules. We performed a systematic and comparative analysis of current-voltage (\(I-V\)) characteristics for chains of nanoparticles, having variable length and configuration. The \(I-V\) characteristics \(I\sim (V-V_{t})^{\zeta }\) (with voltage threshold \(V_t\approx \) 0 and scaling exponent \(\zeta \approx \) 1) are attributed to hopping transport. Current fluctuations at a fixed bias voltage were observed, with a fluctuation amplitude proportional to the voltage applied. We found that the resistance of the bridge is not only a function of the number of molecular contacts, but also depends on the strength of the individual interactions between metal conductor and molecules.
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Acknowledgments
The authors acknowledge G. Reiter for discussions of the experimental results. This work was financially supported by the Deutsche Forschungsgemeinschaft (DFG) under the grant number PA 378/10-2 and funding by the EWE AG Oldenburg.
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Govor, L.V., Parisi, J. (2015). Charge Transport in Chain of Nanoparticles. In: Müller, S., Parisi, J. (eds) Bottom-Up Self-Organization in Supramolecular Soft Matter. Springer Series in Materials Science, vol 217. Springer, Cham. https://doi.org/10.1007/978-3-319-19410-3_4
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