Fabrication of calcium ion sensitive diamond field effect transistors (FETs) based on immobilized calmodulin

Jung Hoon Yang, Munenori Degawa, Kwang Soup Song, Chunlei Wang, Hiroshi Kawarada

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    3 Citations (Scopus)


    We have developed calcium (Ca2+) ion sensitive solution-gate field effect transistors (SGFETs) on polycrystalline diamond by using partial amination and immobilization of calmodulin (CaM), a specific protein to calcium ions. The CaM is covalently immobilized on functionalized diamond surface, and the functionalized surface was analyzed by X-ray photoelectron spectroscopy, respectively. Also, the high performance of the CaM-immobilized diamond SGFET for detecting Ca2+ were studied with respect to high selectivity and sensitivity in various concentrations and pH.

    Original languageEnglish
    Pages (from-to)2321-2324
    Number of pages4
    JournalMaterials Letters
    Issue number21
    Publication statusPublished - 2010 Nov 15



    • Calcium ion sensor
    • Calmodulin
    • Diamond FET
    • Functionalization

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

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