Preparation of TiO2 nanowire arrays through hydrothermal growth method and their pH sensing characteristics

Yen Chieh Huang, Fu Shou Tsai, Shui-Jinn Wang

研究成果: Article

12 引文 斯高帕斯(Scopus)

摘要

The use of a TiO2 nanowire (NW) hydrothermally grown on an fluorine-doped tin oxide (FTO) substrate as a separated sensing electrode of an extended-gate field-effect-transistor (SE-EGFET) pH sensor is demonstrated. Sensing responses to the prepared samples in a wide pH range (2-12) are presented and compared with responses of a film-type TiO2 electrode. The pH sensors with the NW-type and film-type electrodes show a sensitivity of 62 and 50mV/pH, respectively, and a comparably good linearity in the pH range of 2-12. The superiority of the NW-type TiO2 electrode (24% improvement in sensitivity compared with that of the film-type electrode) is attributed mainly to the higher surface-to-volume (SV) ratio and higher conductivity of the hydrogen thermal growth (HTG) nanowires.

原文English
文章編號06JG02
期刊Japanese Journal of Applied Physics
53
發行號6 SPEC. ISSUE
DOIs
出版狀態Published - 2014 一月 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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