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Advanced Materials

Electrodeposition of quantum-confined metal/semiconductor nanocomposites

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  • This work was supported by National Science Foundation grant DMR-9202872, Office of Naval Research grants N00014-96-1-0984 and N00014-94-1-09 17, and the University of Missouri Research Board.

Abstract

Electrodepositiona s an approach to quantum confinement is the idea behind the work on nanocomposite films of Cu and Cu2O reported here. The phase of the film electrodeposited from an alkaline aqueous solution of copper(II) lactate depends on the cathodic current density used, varying from pure Cu2O (a p-type semiconductor) to 98 mol-% Cu, the color of the film changing correspondingly; the electrode potential oscilates spontaneously at fixed current density. It is shown that the Cu2O crystallites exhibit the optical properties of quantum dots.

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