Water-stable organic transistors and their application in chemical and biological sensors
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
The development of low-cost, reliable sensors will rely on devices capable of converting an analyte binding event to an easily read electrical signal. Organic thin-film transistors (OTFTs) are ideal for inexpensive, single-use chemical or biological sensors because of their compatibility with flexible, large-area substrates, simple processing, and highly tunable active layer materials. We have fabricated low-operating voltage OTFTs with a cross-linked polymer gate dielectric, which display stable operation under aqueous conditions over >104 electrical cycles using the p-channel semiconductor 5,5′-bis-(7-dodecyl-9H-fluoren-2-yl)-2,2′-bithiophene (DDFTTF). OTFT sensors were demonstrated in aqueous solutions with concentrations as low as parts per billion for trinitrobenzene, methylphosphonic acid, cysteine, and glucose. This work demonstrates of reliable OTFT operation in aqueous media, hence opening new possibilities of chemical and biological sensing with OTFTs.
Details
Original language | English |
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Pages (from-to) | 12134-12139 |
Number of pages | 6 |
Journal | Proceedings of the National Academy of Sciences of the United States of America : PNAS |
Volume | 105 |
Issue number | 34 |
Publication status | Published - 26 Aug 2008 |
Peer-reviewed | Yes |
Externally published | Yes |
External IDs
PubMed | 18711145 |
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Keywords
Research priority areas of TU Dresden
ASJC Scopus subject areas
Keywords
- Chemical detection, Low-voltage, Organic semiconductors, Polymer dielectric