Effect of UV irradiation on adsorption/desorption of oxygen and water on carbon nanotubes

Eric S. Muckley; Anthony J. Nelson; Christopher B. Jacobs; Ilia N. Ivanov

doi:10.1117/12.2214462

24 February 2016 Effect of UV irradiation on adsorption/desorption of oxygen and water on carbon nanotubes

Eric S. Muckley, Anthony J. Nelson, Christopher B. Jacobs, Ilia N. Ivanov

Proceedings Volume 9745, Organic Photonic Materials and Devices XVIII; 97451K (2016) https://doi.org/10.1117/12.2214462
Event: SPIE OPTO, 2016, San Francisco, California, United States

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.

Citation Download Citation

Eric S. Muckley, Anthony J. Nelson, Christopher B. Jacobs, and 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); https://doi.org/10.1117/12.2214462

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