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 journalArticlepeer-review

378 Scopus citations


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 languageEnglish (US)
Pages (from-to)1747-1751
Number of pages5
JournalNano letters
Issue number8
StatePublished - Aug 1 2006

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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