Fabrication of Ag/Tl-Ba-Ca-CuO/CdSe nanostructure by electro-deposition technique

Junctions between metal, semiconductor and superconductor materials seem to be promising for their application as electronic devices, microelectronic devices and high power transmission. We fabricated Ag/Tl-Ba-Ca-CuO/CdSe nan ostructures by using dc electro-deposition technique. The TI-Ba-Ca-Cu alloy ed thin films were deposited onto silver substrate at a constant potential of -1.25 V and then oxidized electrochemically at a potential of +0.7 V wit h respect to saturated calomel electrode (SCE) from 1 N KOH solution. Semic onducting CdSe was subsequently deposited onto superconducting system at a constant potential of -0.6V with respect to SCE. Particle size confirmed th e presence of nanostructure, of the order of 27 nm. The sizeable change of the electrical conductivity was obtained by irradiating the nanostructure w ith red He-Ne laser (lambda = 632.8 nm) for different periods. (C) 2001 Els evier Science B.V. All rights reserved.