Role of Defects in Single-Walled Carbon Nanotube Chemical Sensors
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2006
- Accession Number
- ADA574111
Entities
People
- Eric S. Snow
- Frank Keith Perkins
- Joshua A. Robinson
- Thomas L. Reinecke
- Ştefan C. Bǎdescu
Organizations
- United States Naval Research Laboratory