Electrochemical detection of the explosive taggant 2,3-dimethyldinitrobutane using a single-walled carbon nanotube employed TiO2 composite film

Seung Woo Lee, Sergiy Korposh, Takeshi Onodera, Kiyoshi Toko

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A highly sensitive and fast method for electrochemical detection of 2,3-dimethyldinitrobutane (DMNB) on a graphite working electrode modified with a TiO2 thin film including single-walled carbon nanotubes (SWCNTs) is proposed. Incorporation of the SWCNTs into the inorganic matrix allowed the preparation of a highly stable film with an integrated electrochemical chip. The sensing mechanism is based on the current change generated at the specific voltage due to the redox reaction of the DMNB NO2 functional group. The detection limit and sensitivity were significantly improved due to the interaction between the SWCNTs and the analyte, which considerably enhanced the electron transferability. Under the optimized conditions, the linear range of the DMNB detection was 10 ppb to 10 ppm with a detection limit of 12 ppb, showing a sensitivity of 61 nA ppb-1.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalNanoscience and Nanotechnology - Asia
Volume1
Issue number1
DOIs
Publication statusPublished - Jul 1 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

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