Ellipsometric study of WO3 films dissolution in aqueous solutions: Reaction mechanism.

M.A. PÉREZ; M. LÓPEZ TEIJELO

JOURNAL OF PHYSICAL CHEMISTRY B

American Chemical Society

Año: 2005 vol. 109 p. 19369 - 19369

1089-5647

font size="2" face="Times New Roman"> The present work demonstrates that the dissolution of anodic WO3 can be described in terms of general mechanisms already used to account for the physicochemical processes involved in the dissolution of oxides of other metals. The chemical dissolution of anodic WO3 films is characterized by in situ ellipsometry, which has proven to be a suitable technique for studying the processes taking place.1 The capability of ellipsometry for distinguishing between thickness decrease and hydration and generation of porosity/roughness helps to analyze the thickness range within which reliable kinetic information can be obtained. The dissolution rate law found for anodic WO