Miniaturized diamond field-effect transistors for application in biosensors in electrolyte solution

Kwang Soup Song, Takahiro Hiraki, Hitoshi Umezawa, Hiroshi Kawarada

    研究成果: Article

    22 引用 (Scopus)

    抄録

    The authors fabricated diamond solution-gate field-effect transistors (SGFETs) with miniaturization of the channel length to 5 μm by photolithography. The channel surface was directly functionalized with amine by ultraviolet irradiation in an ammonia gas for 4 h and aminated diamond SGFETs were sensitive to pH by 40 mVpH. Urease was immobilized on the amine-modified channel surface, which was sensitive to urea by 27 μA /decade from 10-5 M to 10-2 M. The authors fabricated submicron-sized (500 nm) diamond SGFETs using electron-beam lithography. The transconductance (gm) was 56 mSmm, which was 930-fold greater than that of the 500 μm channel length.

    元の言語English
    記事番号063901
    ジャーナルApplied Physics Letters
    90
    発行部数6
    DOI
    出版物ステータスPublished - 2007

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    bioinstrumentation
    field effect transistors
    diamonds
    electrolytes
    amines
    miniaturization
    transconductance
    photolithography
    ureas
    ammonia
    lithography
    electron beams
    irradiation
    gases

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    これを引用

    Miniaturized diamond field-effect transistors for application in biosensors in electrolyte solution. / Song, Kwang Soup; Hiraki, Takahiro; Umezawa, Hitoshi; Kawarada, Hiroshi.

    :: Applied Physics Letters, 巻 90, 番号 6, 063901, 2007.

    研究成果: Article

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