An ellipsometric investigation of the anodic oxide of molybdenum

✍ Scribed by D.J. De Smet

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 692 KB
• Volume: 21
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(76)85170-5

✦ Synopsis

The anodic oxide film formed on molybdenum in an electrolyte of acetic acid, sodium borate, and a small quantity of water has been studied using ellipsometry. Experimental results indicate that when a cathodic current is applied to a molybdenum electrode upon which an anodic oxide film has been grown, conversion of the anodic oxide occurs and a different film appears on the electrode surface. Both the refractive index and the thickness of the converted film differ from those of the anodic film. Ellipsometric data are consistent with a model in which the conversion of the anodic film begins at the film-electrolyte interface and proceeds .inward toward the metal. Other possible models are presented for comparison purposes.