Analysis of Capillary Condensation of Vapor in Multi-Wall Carbon Nanotubes

Abstract:

Multi-wall Carbon Nanotubes (MWNTs) is the new hotspot material as the active sensing element, but there is no certain theory on the phenomenon of the vapor's capillary condensation in MWNTs for the present. This paper presents a new theory that the capillary condensation of vapor in MWNTs mostly occur in the internal hollow tube, according to the calculation of equivalent model of MWNTs. A kind of carbon nanotubes (CNTs) humidity sensor based on quartz crystal microbalance was fabricated, CNTs employed as adsorption materials. The sensor was put in 11% and 97% relative humidity environment in experimental, and the value of M_H2O/M_CNT was calculated. The theory in this paper is proved by the comparison between the experimental and the analysis results.

• Periodical: Key Engineering Materials (Volume 483)
• Pages: 694-698
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.483.694
• Online since: June 2011
• Authors: Wei Wang, Xin Wang, Tuo Li, Wei Ping Chen
• Keywords: Capillary Condensation, Multi-Walled Carbon Nanotube (MWCNT), Quartz-Crystal

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