title: Carbon Nanotube-Based Chemical Sensors.
abstract: The need to sense gases and vapors arises in numerous scenarios in industrial, environmental, security and medical applications. Traditionally, this activity has utilized bulky instruments to obtain both qualitative and quantitative information on the constituents of the gas mixture. It is ideal to use sensors for this purpose since they are smaller in size and less expensive; however, their performance in the field must match that of established analytical instruments in order to gain acceptance. In this regard, nanomaterials as sensing media offer advantages in sensitivity, preparation of chip-based sensors and construction of electronic nose for selective detection of analytes of interest. This article provides a review of the use of carbon nanotubes in gas and vapor sensing.
authors.affiliation: NASA Ames Research Center, Moffett Field, CA, 94035, USA.
authors.forename: M
authors.initials: M
authors.lastname: Meyyappan
mesh_terms: D002621:Chemistry / Q000379:methods*; D002623:Chemistry Techniques, Analytical; D004553:Electric Conductivity; D004566:Electrodes; D004784:Environmental Monitoring / Q000379:methods; D004867:Equipment Design; D005740:Gases; D008422:Materials Testing; D049329:Nanostructures; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry*; D025341:Principal Component Analysis
chemical_list: D005740:Gases; D037742:Nanotubes, Carbon
keywords: carbon nanotubes; chemical sensors; chemiresistors; electronic noses; gas sensing; vapor sensing