Orthorhombic Pbcn SnO₂ nanowires for gas sensing applications

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• 作者：Jordi Arbiol ; Elisabetta Comini ; Guido Faglia ; Giorgio Sberveglieri ; Joan Ramon Morante
• 关键词：A1. Crystal structure ; A2. Growth from vapor ; B1. Nanomaterials ; B2. Oxides ; B3. Semiconductor gas sensors
• 刊名：Journal of Crystal Growth
• 出版年：2008
• 出版时间：4 January 2008
• 年：2008
• 卷：310
• 期：1
• 页码：253-260
• 全文大小：1922 K

文摘

Pure monocrystalline orthorhombic SnO₂ nanowires decorated and non-decorated with cassiterite SnO₂ nanoclusters are analyzed and compared with pure monocrystalline cassiterite SnO₂. We corroborate the coexistence of both, cassiterite and orthorhombic phases, having a higher growth speed for the cassiterite one, in the obtained nanowires by the evaporation/condensation technique. For both phases, the building blocks are the [SnO₆]⁸⁻ octahedron which are forming chains of edge-sharing octahedral along the [0 0 1] direction for the cassiterite phase, while in the orthorhombic phase, chains run in a zigzag fashion and contains four octahedra on each unit of chain instead of two previously reported for orthorhombic material obtained at high pressure conditions as Pbcn SnO₂ orthorhombic structure. Results obtained reveal singular structural characteristics of these synthesized orthorhombic nanowires.