Effect of UV irradiation on the dynamics of oxygen and water interaction with carbon nanotubes

Conference · Mon Feb 01 00:00:00 EST 2016

OSTI ID:1240575

Muckley, Eric S. ^[1]; Nelson, Anthony J. ^[2]; Jacobs, Christopher B.  ^[1]; Ivanov, Ilia N.  ^[1]

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1. ORNL
2. Virginia Tech, Blacksburg, VA

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1240575
• Resource Relation: Conference: SPIE OPTO - San Fransisco, Colorado, United States of America - 2/13/2016 12:00:00 AM-2/18/2016 12:00:00 AM
• Country of Publication: United States
• Language: English

Related Subjects

SWCNT
MWCNT
adsorption
UV
QCM
humidity