Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


J. Korean Phy. Soc. 2011; 59(2(1)): 493-496

Published online August 12, 2011

Copyright © The Korean Physical Society.

Variation in the Resistance Response of CNT-based Thin Film by Silane Binder with Changes in Humidity

Seong Jeon Kim


We deposited single-walled carbon nanotube (SWNT)/silane hybrid thin films on glass substrates by multiple spray-coating of a SWNT solution to examine the electrical response of the films to changes in humidity. Generally, silane binders, which are often mixed in a carbon nanotube (CNT) solution to adhere the CNTs to substrates, can be easily functionalized to each group on the surfaces of the CNTs after they have been hardened by way of the hydrolysis reaction. In this work, we investigate how silane binders, tetraethoxysilane (TEOS), methyltrimethoxysilane (MTMS), and vinyltrimethoxysilane (VTMS), in SWNT hybrid thin films affect electrical response. We observed that the resistance in the samples using TEOS changed sharply with increasing humidity while the resistance was almost invariant in the samples using MTMS and VTMS for the same increase in humidity.

Keywords: Silane binders, Sensor, SWNTs, , TEOS, Spray-coating, Humidity