Abstract
Nanoporous tin oxide layers were electrochemically synthesized by potentiostatic anodization of metallic tin. The current density vs time curve exists two trends in the initial stages of tin anodizing at different potentials, which are mainly attributed to the amount of oxygen released. The obtained anodic tin oxide film had an inner and outer layer structure. The morphology evolution of nanoporous tin oxide layers during anodization were studied in detail. And a model is proposed to explain the phenomenon of transverse cracks and voids formed by segmented oxide and excess oxygen, based on which an anodized tin oxide film with few cracks was prepared by suppressing the generation of oxygen.
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