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Journal of Photonics for Energy

Multimodal probing of oxygen and water interaction with metallic and semiconducting carbon nanotube networks under ultraviolet irradiation
Author(s): Eric S. Muckley; Anthony J. Nelson; Christopher B. Jacobs; Ilia N. Ivanov
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Paper Abstract

Interaction between ultraviolet (UV) light and carbon nanotube (CNT) networks plays a central role in gas adsorption, sensor sensitivity, and stability of CNT-based electronic devices. To determine the effect of UV light on sorption kinetics and resistive gas/vapor response of different CNT networks, films of semiconducting single-wall nanotubes (s-SWNTs), metallic single-wall nanotubes, and multiwall nanotubes were exposed to O2 and H2O vapor in the dark and under UV irradiation. Changes in film resistance and mass were measured in situ. In the dark, resistance of metallic nanotube networks increases in the presence of O2 and H2O, whereas resistance of s-SWNT networks decreases. UV irradiation decreases the resistance of metallic nanotube networks in the presence of O2 and H2O and increases the gas/vapor sensitivity of s-SWNT networks by nearly a factor of 2 compared to metallic nanotube networks. s-SWNT networks show evidence of delamination from the gold-plated quartz crystal microbalance crystal, possibly due to preferential adsorption of O2 and H2O on gold. UV irradiation increases the sensitivity of all CNT networks to O2 and H2O by an order of magnitude, which demonstrates the importance of UV light for enhancing response and lowering detection limits in CNT-based gas/vapor sensors.

Paper Details

Date Published: 1 June 2016
PDF: 10 pages
J. Photon. Energy 6(2) 025506 doi: 10.1117/1.JPE.6.025506
Published in: Journal of Photonics for Energy Volume 6, Issue 2
Show Author Affiliations
Eric S. Muckley, Oak Ridge National Lab. (United States)
The Bredesen Ctr. for Interdisciplinary Research and Graduate Education (United States)
Anthony J. Nelson, Virginia Polytechnic Institute and State Univ. (United States)
Christopher B. Jacobs, Oak Ridge National Lab. (United States)
Ilia N. Ivanov

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