Open AccessFabrication and Characterization of an OTFT‐Based Biosensor Using a Biotinylated F8T2 Polymer
Author(s) -
Lim Sang Chul,
Yang Yong Suk,
Kim Seong Hyun,
Kim ZinSig,
Youn DooHyeb,
Zyung Taehyoung,
Kwon Ji Young,
Hwang DoHoon,
Kim Do Jin
Publication year - 2009
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.09.1209.0001
Subject(s) - biosensor , biotinylation , fabrication , materials science , thin film transistor , avidin , polymer , nanotechnology , characterization (materials science) , optoelectronics , organic semiconductor , chemistry , layer (electronics) , composite material , medicine , biochemistry , alternative medicine , pathology
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.