title: Fast carbon nanotube detectors for micro gas chromatographs.
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.
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana Champaign, USA. salehikh@illinois.edu rich.masel@dioxidematerials.com. salehikh@illinois.edu
authors.forename: Amin
authors.initials: A
authors.lastname: Salehi-Khojin
authors.forename: Kevin Y
authors.initials: KY
authors.lastname: Lin
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Field
authors.forename: Richard I
authors.initials: RI
authors.lastname: Masel
mesh_terms: D000438:Alcohols / Q000302:isolation & purification; D001554:Benzene / Q000302:isolation & purification; D002849:Chromatography, Gas / Q000295:instrumentation* / Q000379:methods; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D037742:Nanotubes, Carbon / Q000737:chemistry*; D012680:Sensitivity and Specificity; D014050:Toluene / Q000302:isolation & purification
chemical_list: D000438:Alcohols; D037742:Nanotubes, Carbon; D014050:Toluene; D001554:Benzene