Formation and characterization of SnO₂ nanobaskets

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• 作者：Paige L. Johnson and Dale Teeters
• 刊名：Solid State Ionics
• 出版年：2006
• 出版时间：31 October 2006
• 年：2006
• 卷：177
• 期：26-32
• 页码：2821-2825
• 全文大小：1237 K

文摘

This work describes the formation and characterization of a novel nanostructured SnO₂ film. We have found that RF-magnetron sputtering of SnO₂ onto a porous alumina substrate leads to the formation of short, capped nanotubes, termed “nanobaskets”. They have been characterized using scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, Raman spectroscopy, and a.c. impedance spectroscopy. Raman spectroscopy shows that vibrational modes associated with this nanostructured SnO₂ are considerably different than crystalline SnO₂ and indicate that the nanobaskets are composed of smaller nanoparticles less than 4 nm in size. AC impedance data confirm these results by showing a very large grain boundary component that almost completely obscures the contribution of the bulk grains. The nanobaskets can be made with a variety of materials and size ranges, and may be formed in layers of more than one material.