Accession Number:

ADA574111

Title:

Role of Defects in Single-Walled Carbon Nanotube Chemical Sensors

Descriptive Note:

Journal article

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC ELECTRONICS SCIENCE AND TECHNOLOGY DIV

Report Date:

2006-07-01

Pagination or Media Count:

6.0

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.

Subject Categories:

  • Refractory Fibers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE