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Carbon Nanotube Sensors for Gas and Organic Vapor Detection

Li, Jing, Lu, Yijiang, Ye, Qi, Cinke, Martin, Han, Jie, Meyyappan, M.·2003·Nano Letters

Abstract

A gas sensor, fabricated by the simple casting of single-walled carbon nanotubes (SWNTs) on an interdigitated electrode (IDE), is presented for gas and organic vapor detection at room temperature. The sensor responses are linear for concentrations of sub ppm to hundreds of ppm with detection limits of 44 ppb for NO 2 and 262 ppb for nitrotoluene. The time is on the order of seconds for the detection response and minutes for the recovery. The variation of the sensitivity is less than 6% for all of the tested devices, comparable with commercial metal oxide or polymer microfilm sensors while retaining the room-temperature high sensitivity of the SWNT transistor sensors and manufacturability of the commercial sensors. The extended detection capability from gas to organic vapors is attributed to direct charge transfer on individual semiconducting SWNT conductivity with additional electron hopping effects on intertube conductivity through physically adsorbed molecules between SWNTs.

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Metadata

Authors
Li, J., Lu, Y., Ye, Q., Cinke, M., Han, J., & Meyyappan, M.
Venue
Nano Letters
Published
2003-06-13
Volume
3
Issue
7
Pages
929-933
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W2146161411
Cited by
1,810
References
0
FWCI
41.56
Type
journal article
Language
en
Open access
closed

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.