NH3 sensitive chemiresistor sensors using plasma functionalized multiwall carbon nanotubes/conducting polymer composites

Tai Jin Kim, Si Dong Kim, Nam Ki Min, James Jungho Pak, Cheol Jin Lee, Soo Won Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

We present a micromachined NH3 chemiresistor sensor based on O2 plasma functionalized multiwall carbon nanotube (MWCNT)/ conducting polymer (CP) composites, and discuss its gas sensing mechanism. The FTIR spectra of plasma-treated MWCNTs indicate that oxygenated groups are created on the surface of CNTs after the plasma treatment. The plasma-functionalized MWCNT/PANI sensor exhibits a linear response of 3.34% per ppm NH3 for concentrations ranging from 10 to 100 ppm, and a sensitivity of about 7 times higher than that from a corresponding pristine MWCNT sensor. This dramatic change in resistance is attributed to the fact that the binding of the functional group with the defective CNT is stronger than that with the perfect one.

Original languageEnglish
Title of host publication2008 IEEE Sensors, SENSORS 2008
Pages208-211
Number of pages4
DOIs
Publication statusPublished - 2008
Event2008 IEEE Sensors, SENSORS 2008 - Lecce, Italy
Duration: 2008 Oct 262009 Oct 29

Publication series

NameProceedings of IEEE Sensors

Other

Other2008 IEEE Sensors, SENSORS 2008
CountryItaly
CityLecce
Period08/10/2609/10/29

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Kim, T. J., Kim, S. D., Min, N. K., Pak, J. J., Lee, C. J., & Kim, S. W. (2008). NH3 sensitive chemiresistor sensors using plasma functionalized multiwall carbon nanotubes/conducting polymer composites. In 2008 IEEE Sensors, SENSORS 2008 (pp. 208-211). [4716419] (Proceedings of IEEE Sensors). https://doi.org/10.1109/ICSENS.2008.4716419