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Erschienen in:
18.04.2018
Formation of Anisotropic Nanostructures on Rutile TiO2(110) Surfaces and Their Photo-Absorption Properties
Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 7/2018
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Abstract
Enhancement of absorption properties in nanostructures of rutile TiO2, fabricated through an ion beam sputtering process, are reported here. The nanostructures are anisotropic in nature, being elongated along the [001] direction. With increasing fluence, the anisotropy of the nanostructures increases. Their width along [1\(\bar{1}\)0], however, is constrained and does not grow proportionally. The results indicate that the asymmetric diffusion of mobile species, created by preferential sputtering, on the rutile TiO2(110) surface plays a crucial role in defining the nanostructure morphology as well as the photo-absorption properties. An enhanced photo-absorption response from TiO2 nanostructures was also observed here. The results were obtained in the absence of any dopant material.