Porous Indium Oxide Nanotubes: Layer-by-Layer Assembly on Carbon-Nanotube Templates and Application for Room-Temperature NH3 Gas Sensors


  • The authors appreciate the financial support from the Natural Science Foundation of China (No.60225010) and the Program for New Century Excellent Talents in Universities. Thanks are also due to Prof. Youwen Wang and Yaowu Zeng for the TEM and FESEM measurements. Supporting information is available online from Wiley InterScience or from the author.


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Porous and polycrystalline In2O3nanotubes are prepared by layer-by-layer assembly on CNT templates and subsequent calcination (see figure). The as-prepared In2O3 nanotubes exhibit superior sensitivity to NH3 at room temperature, as well as a good reproducibility and short response/recovery time. This novel approach presented herein can be extended to synthesize other metal oxide nanotubes such as NiO, SnO2, Fe2O3, and CuO.