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

Porous and polycrystalline In2O3 nanotubes 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. Supporting information for this article is available on the WWW under http: //www. wiley-vch. de/contents/jc₂089/2007/c2128ₛ. pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.