Differentiation of gas molecules using flexible and all-carbon nanotube devices

Dongliang Fu, Hueiling Lim, Yumeng Shi, Xiaochen Dong, S. G. Mhaisalkar, Yuan Chen, Shabbir Moochhala, Lain Jong Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

81 Scopus citations


Carbon nanotubes (CNTs) are extremely sensitive to the electronic perturbations from environmental gases. However, the electrical detection of carbon monoxide (CO) is still a challenge. Here we show that 1 ppm of CO can be electrically detected at room temperature using a CNT resistor and the detection is proposed related to the sidewall functionalities (COOH). A simple all-CNT electronic nose composed of two resistors (or one resistor plus one transistor) is able to differentiate CO and other oxidative gases (for example NO and NO2). The electronic nose is working on both conventional SiO 2/Si and flexible substrates.

Original languageEnglish (US)
Pages (from-to)650-653
Number of pages4
Issue number3
StatePublished - Jan 24 2008
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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