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분야
공학 > 전기공학
저자
김인태 ( In Tae Kim ) , 안태창 ( Tae Chang An ) , 임근배 ( Geun Bae Lim )
발행기관
한국센서학회
간행물정보
센서학회지 2013년, 제22권 제5호, 346~351페이지(총6페이지)
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26401642.pdf [무료 PDF 뷰어 다운로드]
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    영문초록
    We developed a one-step method for fabrication of addressable suspended SWNT films and demonstrate excellent detection performance of paraoxon based on OPH-immobilized SWNT films for environmental monitoring. For dispersed SWNT suspension, COOH-SWNT was prepared by the oxidation of carbon nanotubes using acid treatment and sonication. Suspended SWNT-film was fabricated between cantilever electrodes by dielectrophoretic force and surface tension of the water meniscus. After that, OPH were immobilized on suspended SWNT-films by nonspecific binding for enzymatic hydrolysis of paraoxon. The electrical properties of the SWNT films were measured in real time at room temperature. Structurally suspended SWNT films from substrate surface made possible rapid and highly sensitive detection of target molecules with increased convectional and diffusional fluxes of the molecules and with a large binding surface area. SWNT film FET resulted in a real-time, label-free, and electrical detection of paraoxon to the concentration of ca. 10 μm with a step-wise rapid response time of several seconds.
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