Optical Phosphate-Ion Sensor Based on Electrochromism of Metal-Oxide Thin-Film Electrode

• Shimizu Youichi

  Kyushu Institute of Technology

• Furuta Yusuke

  Kyushu Institute of Technology

• Yamashita Tohru

  Kyushu Institute of Technology

Abstract

Optical phosphate-ion sensors based on electrochromism of oxide thin-film electrodes were developed. Among the oxide thin-films tested, it was found that Co₃O₄ and NiO -based electrodes prepared onto ITO glasses by a sol-gel method showed good sensing performance, i.e., the transmittance at 400-800nm of the electrodes changed reversibly depending on HPO₄^2- concentration under applying anodic electrode potentials. The transmittance change of Co₃O₄ based element at 620nm was almost linear to the logarithm of the HPO₄^2- concentration between 1.0×10^-6 and 1.0×10^-2 M at+0.4 V vs. SCE. The 90% response time of the element, when the electrode potential was changed from +0.4 to 0 V vs. SCE at 1.0×10^-2 M, was about 50s at room temperature.

Journal

• IEEJ Transactions on Sensors and Micromachines

  IEEJ Transactions on Sensors and Micromachines 119 (5), 285-289, 1999

  The Institute of Electrical Engineers of Japan

Keywords

• phosphate-ion sensor
• electrochromism
• metal-oxide
• thin-film

Details

• CRID: 1390001204462001408
• NII Article ID: 10004833966
• NII Book ID: AN1052634X
• DOI: 10.1541/ieejsmas.119.285
• ISSN: 13475525
• ISSN: 13418939
• NDL BIB ID: 4716383
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4716383
• Web Site: http://www.jstage.jst.go.jp/article/ieejsmas1995/119/5/119_5_285/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed