Selective and sensitive TNT sensors using biomimetic polydiacetylene-coated CNT-FETs

Tae Hyun Kim, Byung Yang Lee, Justyn Jaworski, Keisuke Yokoyama, Woo Jae Chung, Eddie Wang, Seunghun Hong, Arun Majumdar, Seung Wuk Lee

Research output: Contribution to journalArticlepeer-review

142 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)2824-2830
Number of pages7
JournalACS nano
Issue number4
Publication statusPublished - 2011 Apr 26
Externally publishedYes


  • TNT sensor
  • carbon nanotube
  • lipid membrane receptor
  • polydiacetylene
  • trinitrotoluene

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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