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Oxides are the basis of smart and functional materials. Synthesis and device fabrication using semiconductor oxides have attracted a lot of attention recently because physical properties of these oxides can be tuned. In this research, SnO2 nanobelts and rods were synthesized using Sn and SnO powders as starting material and using a simple thermal transport method. The size control of SnO2 nanostructures has also been demonstrated. The results suggested that the growth mechanism is the vapor-liquid-solid (VLS) mechanism for all the structures. The SnO2 nanobelts have width in the range of 70-500 nm, thickness below 100 nm, and length over 50 micrometer. It is suggested that this method is suitable to synthesize the high-quality SnO2 nanobelts with catalyst-assisted growth by a simple method. To explore the possible applications of these novel structures, single particle SnO2 gas sensor have been fabricated and successfully used to detect harmful gases like H2 and CO. |