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Sensors Based on Organic Thin Film Transistors

机译：基于有机薄膜晶体管的传感器

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摘要

Organic thin-film transistors (OTFT) are excellent candidates for the application on disposable sensors due to their potentially low-cost and easy fabrication process. Two types of OTFT-based sensors have been studied. One is light sensitive phototransistor based on the composite of poly(3-hexylthiophene) and TiO_2 nanoparticles. The device shows a quick change of channel current under light exposure, which can be attributed to a positive shift of the threshold voltage induced by accumulated electrons trapped by the TiO_2 nanoparticles in the channel. Another one is for sensing DNA hybridization. Both single and double strand DNA molecules are immobilized on the surface of the Au source/drain electrodes of different devices, inducing a dramatic change in the performance of the OTFTs. Single strand DNA and double strand DNA are differentiated successfully in the experiments indicating that this is a promising technique for sensing DNA hybridization without labeling.
机译：有机薄膜晶体管（OTFT）由于其潜在的低成本和易于制造的过程，因此是在一次性传感器上应用的极佳候选者。已经研究了两种基于OTFT的传感器。一种是基于聚（3-己基噻吩）和TiO_2纳米粒子的复合材料的光敏光电晶体管。该器件在曝光下显示出沟道电流的快速变化，这可以归因于由TiO_2纳米粒子捕获在沟道中的累积电子引起的阈值电压的正向偏移。另一个是用于感测DNA杂交。单链和双链DNA分子都固定在不同设备的Au源/漏电极的表面上，从而导致OTFT的性能发生巨大变化。单链DNA和双链DNA在实验中成功分化，表明这是一种无需标记即可检测DNA杂交的有前途的技术。

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  • 来源
    《Thin Film Transistors 9 (TFT 9)》|2008年|355-364|共10页
  • 会议地点 Honolulu HI(US)
  • 作者

    F. Yan; S. M. Mok; P. Lin; H. L. W. Chan;

  • 作者单位

    Department of Applied Physics, The Hong Kong Polytechnic University, Hung Horn, Kowloon, Hong Kong, China;

    Department of Applied Physics, The Hong Kong Polytechnic University, Hung Horn, Kowloon, Hong Kong, China;

    Department of Applied Physics, The Hong Kong Polytechnic University, Hung Horn, Kowloon, Hong Kong, China;

    Department of Applied Physics, The Hong Kong Polytechnic University, Hung Horn, Kowloon, Hong Kong, China;

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  • 正文语种 eng
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