Coulomb-Blockade Dominated Transport in Patterned Gold-Cluster Structures

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Abstract
In this paper we present the fabrication and near-room temperature electrical transport properties of structures made from the gold-cluster material Au55[P(C6H5)3]12Cl6. We discuss the use of electron-beam lithography to define the structures laterally and compare the direct current-voltage characteristics of non-patterned and patterned structures. In both cases non-linear behavior is observed with features that are consistent with Coulomb blockade dominated transport in disordered arrays of clusters. Radio frequency induced plateaus in the current-voltage characteristics demonstrate coherent tunneling. Finally, we show that other ligand stabilized gold-cluster materials can be used to form ordered gold-cluster arrays.