Detection of a CO and NH3 gas mixture using carboxylic acid-functionalized single-walled carbon nanotubes

Ki Young Dong, Jinnil Choi, Yang Doo Lee, Byung Hyun Kang, Youn Yeol Yu, Hyang Hee Choi, Byeong Kwon Ju

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Carbon nanotubes (CNT) are extremely sensitive to environmental gases. However, detection of mixture gas is still a challenge. Here, we report that 10 ppm of carbon monoxide (CO) and ammonia (NH3) can be electrically detected using a carboxylic acid-functionalized single-walled carbon nanotubes (C-SWCNT). CO and NH3 gases were mixed carefully with the same concentrations of 10 ppm. Our sensor showed faster response to the CO gas than the NH3 gas. The sensing properties and effect of carboxylic acid group were demonstrated, and C-SWCNT sensors with good repeatability and fast responses over a range of concentrations may be used as a simple and effective detection method of CO and NH3 mixture gas.

Original languageEnglish
Article number12
Pages (from-to)1-6
Number of pages6
JournalNanoscale Research Letters
Volume8
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • Carboxylic acid functionalized
  • Gas sensors
  • Mixture gas
  • Single-walled carbon nanotubes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Detection of a CO and NH<sub>3</sub> gas mixture using carboxylic acid-functionalized single-walled carbon nanotubes'. Together they form a unique fingerprint.

  • Cite this