Fabrication and optical absorption of ordered indium oxide nanowire arraysembedded in anodic alumina membranes

Ordered semiconductor In2O3 nanowire arrays embedded in anodic alumina memb ranes were fabricated by electrodeposition and oxidizing methods. The X-ray diffraction and transmission electron microscopy indicate that the In2O3 n anowires with polycrystalline structure are uniformly assembled into the he xagonally ordered nanochannels of the anodic alumina membranes. The optical absorption band edge of In2O3 nanowires array exhibits a marked red shift with respect to that of the bulk In2O3, and depends on the post-heat treatm ent temperature. This is attributed to the oxygen vacancy in In2O3 nanowire s and the interface interactions between the anodic alumina membranes and t he In2O3 nanowires. (C) 2001 Elsevier Science B.V. All rights reserved.