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Updated: May 31, 2026

Quantitative Detection of Trace Explosive Vapors by Programmed Temperature Desorption Gas Chromatography-Electron Capture Detector
Published on: July 25, 2014
Fast carbon nanotube detectors for micro gas chromatographs
Amin Salehi-Khojin1, Kevin Y Lin, Christopher R Field
1Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana Champaign, USA. salehikh@illinois.edu rich.masel@dioxidematerials.com. salehikh@illinois.edu
Abstract:
Highly sensitive and completely reversible chemiresistor detectors based on carbon nanotubes (CNTs) were fabricated for multi-component chemical analysis. CNT detectors were used in a series configuration with a gas chromatography column and exposed to a mixture of nine different compounds. It is shown that CNT detectors were able to show parts per billion (pbb) sensitivity responses to each individual component of the mixture and detect nine distinct chemical compounds in roughly 210 s when the detector operates in current stimulated desorption (CSD) mode. This is the first demonstration of an uncoated CNT detector to analyze multi-component chemical mixtures providing an alternative yet simple sensing approach for online air quality control and health monitoring applications.
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