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In this study, chemical vapor deposition of WO 3 via graphene-catalyzed thermal transport is utilized to prepare position-selective WO 3 micro/nanostructures. The effects of growth temperature and oxygen concentration on the structure, morphology, surface chemical states, and electrical properties are studied. The growth temperature and oxygen concentration are found to alter the resulting morphology and electrical properties. The combined application of high temperature and high oxygen concentration results in porous WO 3 nanosheets with active surfaces. The prepared nanosheets are utilized for room-temperature NH 3 gas sensing, and they exhibit good sensitivity, response time, and recovery time.

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Uniformly distributed crystalline α-molybdenum oxide nanorods (NRs) were grown on c-plane sapphire substrates using a single-step radio frequency sputtering technique. The shape and size of the NRs can be controlled...

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