Water-stable organic transistors and their application in chemical and biological sensors

被引:308
作者
Roberts, Mark E. [1 ]
Mannsfeld, Stefan C. B. [1 ]
Queralto, Nuria [1 ,2 ]
Reese, Colin [1 ]
Locklin, Jason [1 ]
Knoll, Wolfgang [2 ]
Bao, Zhenan [1 ]
机构
[1] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA
[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
基金
美国国家科学基金会; 美国国家航空航天局;
关键词
organic semiconductors; low-voltage; polymer dielectric; chemical detection;
D O I
10.1073/pnas.0802105105
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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 >10(4) 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.
引用
收藏
页码:12134 / 12139
页数:6
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