Abstract
Scattering process of gas molecules on vertically aligned single-walled carbon nanotube (VA-SWNT) films was investigated using molecular beam technique. The surface modification with VA-SWNT films was found to significantly enhance energy accommodation of helium molecules, which tends to be inefficient even on contaminated or rough surfaces because of the large mass mismatch between helium and surface atoms. Our results indicate that the surface modification with VA-SWNT films is promising for enhancing heat transfer across surfaces in micro/nanoscale devices. The efficient energy transfer originates from high porosity of the films, which enables gas molecules to penetrate into the film and have multiple collisions with SWNTs. In order to reveal the scattering process within the film, we also conducted the measurements with freestanding VA-SWNT films. Even for the film as thin as 0.1μm, most of the molecules are well accommodated and are reflected or transmitted diffusively through the film while few molecules are transmitted without any interaction.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
