Wide-gap semiconductors with nanostructures such as nanoparticles, nanorods, nanowires are promising as a new type of gas sensor. Recently, ZnO (zinc oxide) nano-structures have been extensively investigated for acetylene (C2H2) gas sensing device applications. In this paper, a new fabrication method of a C2H2 gas sensor based on ZnO nanowires using dielectrophoresis is demonstrated. Dielectrophoresis (DEP) is the electrokinetic motion of dielectrically polarized materials in nonuniform electric fields. ZnO nanowires were trapped in the microelectrode gap where the electric field became higher. The trapped ZnO nanowires were aligned along the electric field line and bridged the electrode gap. Upon exposure to C2H2 gas, the conductance of the DEP-trapped ZnO nanowires increased. The ZnO nanowire gas sensor response to C2H2 gas was dependent on the temperature and the maximum response was obtained at 250 °C. It was confirmed that the sensor response was considerably improved by electrochemically decorating the ZnO nanowires with platinum nanoparticles.
|出版ステータス||出版済み - 1月 1 2015|
|イベント||2015 IEEE International Conference on Industrial Technology, ICIT 2015 - Seville, スペイン|
継続期間: 3月 17 2015 → 3月 19 2015
|その他||2015 IEEE International Conference on Industrial Technology, ICIT 2015|
|Period||3/17/15 → 3/19/15|
!!!All Science Journal Classification (ASJC) codes
- コンピュータ サイエンスの応用