High-mobility bio-organic field effect transistors with photoreactive DNAs as gate insulators

Youn Sun Kim, Ki Hwa Jung, U. Ra Lee, Kyung Hwan Kim, Mai Ha Hoang, Jung Il Jin, Dong Hoon Choi

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


Organic-soluble DNAs bearing chalcone moieties were synthesized by using purified natural sodium DNA. In addition to the chalcone-containing DNA homopolymer (CcDNA), a copolymer (CTMADNA-co-CcDNA) was synthesized. They were employed as gate insulators for fabricating organic thin-film transistors. An organic semiconductor (5, 5′-(9,10-bis((4-hexylphenyl)ethynyl)anthracene- 2,6-yl-diyl)bis(ethyne-2,1-diyl)bis(2-hexylthiophene; HB-ant-THT) was deposited on the photocrosslinked DNA-based gate insulators via a solution process. Interestingly, the resulting TFT devices had extremely high field-effect mobilities, and their corresponding transfer curves indicated low hysteresis. The carrier mobility of the device with HB-ant-THT deposited on the CTMADNA-co-CcDNA gate insulator was the best, i.e., 0.31cm2 V -1 s-1 (Ion/Ioff=1.0× 10 4).

Original languageEnglish
Article number103307
JournalApplied Physics Letters
Issue number10
Publication statusPublished - 2010

Bibliographical note

Funding Information:
This research was supported by a Grant No. F0004011-2009-32 from Information Display R&D Center, one of the Knowledge Economy Frontier R&D Program funded by the Ministry of Knowledge Economy of Korean government. and by NBIT program (Grant No. K2070200068808A040001710, KICOS, MOST and AFOSR, 2008-2009).

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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