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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Fabrication and Characterization of an OTFT-Based Biosensor Using a Biotinylated F8T2 Polymer

  • Lim, Sang-Chul (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Yang, Yong-Suk (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Kim, Seong-Hyun (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Kim, Zin-Sig (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Youn, Doo-Hyeb (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Zyung, Tae-Hyoung (Convergence Components & Materials Research Laboratory, ETRI) ;
  • Kwon, Ji-Young (Department of Applied Chemistry, Kumoh National Institute of Technology) ;
  • Hwang, Do-Hoon (Department of Applied Chemistry, Kumoh National Institute of Technology) ;
  • Kim, Do-Jin (Department of Nano-System Engineering, Chungnam National University)
  • Received : 2009.03.23
  • Accepted : 2009.08.03
  • Published : 2009.12.31
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Abstract

Solution-processable organic semiconductors have been investigated not only for flexible and large-area electronics but also in the field of biotechnology. In this paper, we report the design and fabrication of biosensors based on completely organic thin-film transistors (OTFTs). The active material of the OTFTs is poly(9,9-dioctylfluorene-co-bithiophene) (F8T2) polymer functionalized with biotin hydrazide. The relationship between the chemoresistive change and the binding of avidin-biotin moieties in the polymer is observed in the output and on/off characteristics of the OTFTs. The exposure of the OTFTs to avidin causes a lowering of ID at $V_D$ = -40 V and $V_G$ = -40 V of nearly five orders of magnitude.

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