Short chains of Au 55 (PPh 3 ) 12 Cl 6 clusters were generated between tungsten tips on an SiO 2 surface, and their electrical behavior was studied. The clusters were deposited from solution by applying a voltage of 2 V between tips of 30 nm in distance. Current−voltage (I−V) measurements of the nanowires showed Coulomb blockades at room temperature in the region between −0.5 to +0.5 V, demonstrating quantum dot character and single electron transistor (SET) behavior, respectively.
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Schmid et al. (2001) studied this question.
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