Role of defects in single-walled carbon nanotube chemical sensors

Joshua A. Robinson; Eric S. Snow; Ştefan C. Bǎdescu; Thomas L. Reinecke; F. Keith Perkins

doi:10.1021/nl0612289

Role of defects in single-walled carbon nanotube chemical sensors

Joshua A. Robinson, Eric S. Snow, Ştefan C. Bǎdescu, Thomas L. Reinecke, F. Keith Perkins

Research output: Contribution to journal › Article › peer-review

434 Scopus citations

Abstract

We explore the electronic response of single-walled carbon nanotubes (SWNT) to trace levels of chemical vapors. We find adsorption at defect sites produces a large electronic response that dominates the SWNT capacitance and conductance sensitivity. This large response results from increased adsorbate binding energy and charge transfer at defect sites. Finally, we demonstrate controlled introduction of oxidation defects can be used to enhance sensitivity of a SWNT network sensor to a variety of chemical vapors.

Original language	English (US)
Pages (from-to)	1747-1751
Number of pages	5
Journal	Nano letters
Volume	6
Issue number	8
DOIs	https://doi.org/10.1021/nl0612289
State	Published - Aug 2006

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl0612289

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abstract = "We explore the electronic response of single-walled carbon nanotubes (SWNT) to trace levels of chemical vapors. We find adsorption at defect sites produces a large electronic response that dominates the SWNT capacitance and conductance sensitivity. This large response results from increased adsorbate binding energy and charge transfer at defect sites. Finally, we demonstrate controlled introduction of oxidation defects can be used to enhance sensitivity of a SWNT network sensor to a variety of chemical vapors.",

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AU - Reinecke, Thomas L.

AU - Perkins, F. Keith

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AB - We explore the electronic response of single-walled carbon nanotubes (SWNT) to trace levels of chemical vapors. We find adsorption at defect sites produces a large electronic response that dominates the SWNT capacitance and conductance sensitivity. This large response results from increased adsorbate binding energy and charge transfer at defect sites. Finally, we demonstrate controlled introduction of oxidation defects can be used to enhance sensitivity of a SWNT network sensor to a variety of chemical vapors.

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Role of defects in single-walled carbon nanotube chemical sensors

Abstract

All Science Journal Classification (ASJC) codes

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