24 February 2016 Effect of UV irradiation on adsorption/desorption of oxygen and water on carbon nanotubes
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Abstract
Carbon nanotube (CNT) films composed of semiconducting single wall nanotubes (s-SWNTs), metallic single wall nanotubes (m-SWNTs), and multiwall nanotubes (MWNTs) were exposed to O2 and H2O vapor in the dark and under UV irradiation. Changes in the film conductivity and mass were measured in situ. We find that UV irradiation increases the resistive response of CNT films to O2 and H2O by more than an order of magnitude. In m-SWNT and MWNT films, UV irradiation changes the sign of the resistive response to O2 and H2O by generating free charge carriers. S-SWNTs show the largest UV-induced resistive response and exhibit weakening of van der Waals interactions with the QCM crystal when exposed to gas/vapor.
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Eric S. Muckley, Eric S. Muckley, Anthony J. Nelson, Anthony J. Nelson, Christopher B. Jacobs, Christopher B. Jacobs, Ilia N. Ivanov, Ilia N. Ivanov, } "Effect of UV irradiation on adsorption/desorption of oxygen and water on carbon nanotubes", Proc. SPIE 9745, Organic Photonic Materials and Devices XVIII, 97451K (24 February 2016); doi: 10.1117/12.2214462; https://doi.org/10.1117/12.2214462
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