Nano Archive

Role of defects in single-walled carbon nanotube chemical sensors

Robinson, Joshua A. and Snow, Eric S. and Badescu, Stefan C. and Reinecke, Thomas L. and Perkins, F. Keith (2006) Role of defects in single-walled carbon nanotube chemical sensors. NANO LETTERS, 6 (8). pp. 1747-1751.

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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.

Item Type:Article
Subjects:Physical Science > Nanoelectronics
Material Science > Nanochemistry
ID Code:2776
Deposited By:Lesley Tobin
Deposited On:08 Jan 2009 16:31
Last Modified:08 Jan 2009 16:31

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