Influence of Molecular Structure And Film Properties on the Water-Stability and Sensor Characteristics of Organic Transistors

被引:68
作者
Roberts, Mark E. [1 ]
Mannsfeld, Stefan C. B. [1 ]
Tang, Ming Lee [1 ]
Bao, Zhenan [1 ]
机构
[1] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA
关键词
D O I
10.1021/cm802530x
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Low-voltage organic thin-film transistors were fabricated to investigate the stability of organic semiconductors in water and determine the critical parameters for aqueous phase chemical detection. We showed that the molecular structure, alkyl-chain length, and thin-film morphology strongly influence the electrical characteristics in water. Highly two-dimensional films of alkyl-substituted semiconductors greatly reduced the influence of water on the electrical characteristics. The sensitivity and response times of OTFT sensors were also impacted by the thin-film structure of the organic semiconductor. OTFT sensors were used to detect 10 parts per-billion cysteine and 40 ppm TNT in aqueous solutions.
引用
收藏
页码:7332 / 7338
页数:7
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