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Fabrication and Characterization of an OTFT-Based Biosensor Using a Biotinylated F8T2 Polymer
- Authors
- Lim, Sang Chul; Yang, Yong Suk; Kim, Seong Hyun; Kim, Zin-Sig; Youn, Doo-Hyeb; Zyung, Taehyoung; Kwon, Ji Young; Hwang, Do-Hoon; Kim, Do Jin
- Issue Date
- Dec-2009
- Publisher
- WILEY
- Keywords
- Organic semiconductor; OTFTs; polymer; F8T2; avidin; biotin; biosensor
- Citation
- ETRI JOURNAL, v.31, no.6, pp 647 - 652
- Pages
- 6
- Journal Title
- ETRI JOURNAL
- Volume
- 31
- Number
- 6
- Start Page
- 647
- End Page
- 652
- ISSN
- 1225-6463
2233-7326
- 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-dioctylfluoreneco-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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