An all-solid-state pH sensor employing fluorine-terminated polycrystalline boron-doped diamond as a pH-insensitive solution-gate field-effect transistor

Yukihiro Shintani, Mikinori Kobayashi, Hiroshi Kawarada

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    A fluorine-terminated polycrystalline boron-doped diamond surface is successfully employed as a pH-insensitive SGFET (solution-gate field-effect transistor) for an all-solid-state pH sensor. The fluorinated polycrystalline boron-doped diamond (BDD) channel possesses a pH-insensitivity of less than 3mV/pH compared with a pH-sensitive oxygenated channel. With differential FET (field-effect transistor) sensing, a sensitivity of 27 mv/pH was obtained in the pH range of 2–10; therefore, it demonstrated excellent performance for an all-solid-state pH sensor with a pH-sensitive oxygen-terminated polycrystalline BDD SGFET and a platinum quasi-reference electrode, respectively.

    Original languageEnglish
    Article number1040
    JournalSensors (Switzerland)
    Volume17
    Issue number5
    DOIs
    Publication statusPublished - 2017 May 5

    Fingerprint

    Solid-state sensors
    pH sensors
    Gates (transistor)
    Diamond
    Boron
    Fluorine
    fluorine
    Diamonds
    boron
    field effect transistors
    diamonds
    solid state
    sensors
    Field effect transistors
    Platinum
    Oxygen
    Electrodes
    sensitivity
    platinum

    Keywords

    • All-solid-state pH sensor
    • Electrolyte-solution-gate field-effect transistor
    • Fluorine-termination
    • PH-insensitivity
    • Polycrystalline boron-doped diamond

    ASJC Scopus subject areas

    • Analytical Chemistry
    • Atomic and Molecular Physics, and Optics
    • Biochemistry
    • Electrical and Electronic Engineering

    Cite this

    An all-solid-state pH sensor employing fluorine-terminated polycrystalline boron-doped diamond as a pH-insensitive solution-gate field-effect transistor. / Shintani, Yukihiro; Kobayashi, Mikinori; Kawarada, Hiroshi.

    In: Sensors (Switzerland), Vol. 17, No. 5, 1040, 05.05.2017.

    Research output: Contribution to journalArticle

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