Cl- sensitive biosensor used electrolyte-solution-gate diamond FETs

Kwang Soup Song, Toshikatsu Sakai, Hirofumi Kanazawa, Yuta Araki, Hitoshi Umezawa, Minoru Tachiki, Hiroshi Kawarada

    Research output: Contribution to journalArticle

    45 Citations (Scopus)

    Abstract

    We have investigated the electrolyte-solution-gate field effect transisitors (SGFETs) used hydrogen terminated (H-terminated) or partially oxygen terminated (O-terminated) polycrystalline diamond surface in the Cl - and Br- ionic solutions. The H-terminated channel SGFETs are insensitive to pH values in electrolyte solutions. The threshold voltages of the diamond SGFETs shift according to the density of Cl- and Br- ions about 30 mV/decade. One of the attractive biomedical applications for the Cl- sensitive SGFETs is the detection of chloride density in blood or in sweat especially in the case of cystic fibrosis. The sensitivities of Cl- and Br- ions have been lost on the partially O-terminated diamond surface. These phenomena can be explained by the polarity of surface change on the H-terminated and the O-terminated surface.

    Original languageEnglish
    Pages (from-to)137-140
    Number of pages4
    JournalBiosensors and Bioelectronics
    Volume19
    Issue number2
    DOIs
    Publication statusPublished - 2003 Nov 15

    Fingerprint

    Diamond
    Biosensing Techniques
    Field effect transistors
    Biosensors
    Electrolytes
    Diamonds
    Hydrogen
    Oxygen
    Ions
    Sweat
    Threshold voltage
    Cystic Fibrosis
    Chlorides
    Blood

    Keywords

    • Cl and Br ionic solution
    • Cystic fibrosis
    • Hydrogen-terminated diamond
    • Oxygen-terminated diamond
    • Threshold voltage

    ASJC Scopus subject areas

    • Biotechnology
    • Analytical Chemistry
    • Electrochemistry

    Cite this

    Cl- sensitive biosensor used electrolyte-solution-gate diamond FETs. / Song, Kwang Soup; Sakai, Toshikatsu; Kanazawa, Hirofumi; Araki, Yuta; Umezawa, Hitoshi; Tachiki, Minoru; Kawarada, Hiroshi.

    In: Biosensors and Bioelectronics, Vol. 19, No. 2, 15.11.2003, p. 137-140.

    Research output: Contribution to journalArticle

    Song, KS, Sakai, T, Kanazawa, H, Araki, Y, Umezawa, H, Tachiki, M & Kawarada, H 2003, 'Cl- sensitive biosensor used electrolyte-solution-gate diamond FETs', Biosensors and Bioelectronics, vol. 19, no. 2, pp. 137-140. https://doi.org/10.1016/S0956-5663(03)00174-X
    Song KS, Sakai T, Kanazawa H, Araki Y, Umezawa H, Tachiki M et al. Cl- sensitive biosensor used electrolyte-solution-gate diamond FETs. Biosensors and Bioelectronics. 2003 Nov 15;19(2):137-140. https://doi.org/10.1016/S0956-5663(03)00174-X
    Song, Kwang Soup ; Sakai, Toshikatsu ; Kanazawa, Hirofumi ; Araki, Yuta ; Umezawa, Hitoshi ; Tachiki, Minoru ; Kawarada, Hiroshi. / Cl- sensitive biosensor used electrolyte-solution-gate diamond FETs. In: Biosensors and Bioelectronics. 2003 ; Vol. 19, No. 2. pp. 137-140.
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    AU - Sakai, Toshikatsu

    AU - Kanazawa, Hirofumi

    AU - Araki, Yuta

    AU - Umezawa, Hitoshi

    AU - Tachiki, Minoru

    AU - Kawarada, Hiroshi

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    KW - Oxygen-terminated diamond

    KW - Threshold voltage

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