Electrolyte-Solution-Gate FETs Using Diamond Surface for Biocompatible Ion Sensors

H. Kawarada*, Y. Araki, T. Sakai, T. Ogawa, H. Umezawa

*この研究の対応する著者

研究成果: Article査読

132 被引用数 (Scopus)

抄録

Diamond field effect transistors have operated in electrolyte solution for the first time. Since the hydrogen-terminated diamond surfaces are stable enough for the use as an electrochemical electrode, the diamond surface channels are exposed to the electrolyte in the transistor structure. A perfect pinch-off and saturated current-voltage characteristics have been obtained for bias voltages within the potential window. The threshold voltages are almost constant in electrolytes with different pH values of 7-13, indicating pH insensitiveness of the hydrogen-terminated diamond surface. Based on this pH insensitive surface, ion selective regions can be fabricated to form transistor-based biosensors.

本文言語English
ページ(範囲)79-83
ページ数5
ジャーナルPhysica Status Solidi (A) Applied Research
185
1
DOI
出版ステータスPublished - 2001 5月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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