Selective and Sensitive TNT Sensors Using Biomimetic Polydiacetylene-Coated CNT-FETs

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• 作者：Tae Hyun Kim ; Byung Yang Lee ; Justyn Jaworski ; Keisuke Yokoyama ; Woo-Jae Chung ; Eddie Wang ; Seunghun Hong ; Arun Majumdar ; Seung-Wuk Lee
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：April 26, 2011
• 年：2011
• 卷：5
• 期：4
• 页码：2824-2830
• 全文大小：936K
• 年卷期：0
• ISSN：1936-086X

文摘

Miniaturized smart sensors that can perform sensitive and selective real-time monitoring of target analytes are tremendously valuable for various sensing applications. We developed selective nanocoatings by combining trinitrotoluene (TNT) receptors bound to conjugated polydiacetylene (PDA) polymers with single-walled carbon nanotube field-effect transistors (SWNT-FET). Selective binding events between the TNT molecules and phage display derived TNT receptors were effectively transduced to sensitive SWNT-FET conductance sensors through the PDA coating layers. The resulting sensors exhibited an unprecedented 1 fM sensitivity toward TNT in real time, with excellent selectivity over various similar aromatic compounds. Our biomimetic receptor coating approach may be useful for the development of sensitive and selective micro- and nanoelectronic sensor devices for various other target analytes.