ChemInform Abstract: Sol—Gel Preparation of AuCu and Au₄Cu Nanocluster Alloys in Silica Thin Films.

Abstract

Sol-Gel Preparation of AuCu and Au 4 Cu Nanocluster Alloys inSilica Thin Films.-The nanocluster alloys of title in SiO 2 thin films are prepared by a sol-gel process starting with HAuCl·4H 2 O, Cu(NO 3 ) 2 ·3H 2 O, and Si(OEt) 4 . XRD data show that the lattice parameters of these nanocluster alloys, both having fcc structure, are very close to the bulk values. The nanocrystals obtained by annealing at 900 • C are nearly sherical in shape. The peaks of the optical spectra are located at 555 nm for AuCu and at 562 nm for AuCu 4 . -(GWAK, J.-H.; KIM, S.-J.; LEE, M.; J.