Highly Sensitive NH3 Detection Based on Organic Field-Effect Transistors with Tris(pentafluorophenyl)borane as Receptor

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• 作者：Weiguo Huang ; Kalpana Besar ; Rachel LeCover ; Ana Mar铆a Rule ; Patrick N. Breysse ; Howard E. Katz
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：September 12, 2012
• 年：2012
• 卷：134
• 期：36
• 页码：14650-14653
• 全文大小：253K
• 年卷期：v.134,no.36(September 12, 2012)
• ISSN：1520-5126

文摘

We have increased organic field-effect transistor (OFET) NH₃ response using tris(pentafluorophenyl)borane (TPFB) as a receptor. OFETs with this additive could detect concentrations of 450 ppb v/v, with a limit of detection of 350 ppb, the highest sensitivity reported to date for semiconductor films; in comparison, when triphenylmethane (TPM) or triphenylborane (TFB) was used as an additive, no obvious improvement in the sensitivity was observed. These OFETs also showed considerable selectivity with respect to common organic vapors and stability toward storage. Furthermore, excellent memory of exposure was achieved by keeping the exposed devices in a sealed container stored at 鈭?0 掳C, the first such capability demonstrated with OFETs.