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

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

    Research output: Contribution to journalArticle

    122 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)79-83
    Number of pages5
    JournalPhysica Status Solidi (A) Applied Research
    Volume185
    Issue number1
    DOIs
    Publication statusPublished - 2001 May

    Fingerprint

    Diamond
    Field effect transistors
    Electrolytes
    Diamonds
    field effect transistors
    diamonds
    electrolytes
    Ions
    sensors
    Sensors
    Hydrogen
    Transistors
    ions
    transistors
    Electrochemical electrodes
    electric potential
    hydrogen
    Current voltage characteristics
    Bias voltage
    Threshold voltage

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Electrolyte-Solution-Gate FETs Using Diamond Surface for Biocompatible Ion Sensors. / Kawarada, Hiroshi; Araki, Y.; Sakai, T.; Ogawa, T.; Umezawa, H.

    In: Physica Status Solidi (A) Applied Research, Vol. 185, No. 1, 05.2001, p. 79-83.

    Research output: Contribution to journalArticle

    Kawarada, Hiroshi ; Araki, Y. ; Sakai, T. ; Ogawa, T. ; Umezawa, H. / Electrolyte-Solution-Gate FETs Using Diamond Surface for Biocompatible Ion Sensors. In: Physica Status Solidi (A) Applied Research. 2001 ; Vol. 185, No. 1. pp. 79-83.
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