P5.2 - The Effect on the Gas Selectivity of Gas Sensors by Binder in SWNTs Solution
- Event
- SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg - Band
- Proceedings SENSOR 2009, Volume II
- Chapter
- P5 - Gas-Sensors
- Author(s)
- S. Kim, B. Gam, H. Lee - Kyungnam University, Kyungnam, Korea, J. Han, G. Lee - KERI (Korea Electrotechnology Research Institute), Kyungnam, Korea
- Pages
- 387 - 391
- DOI
- 10.5162/sensor09/v2/p5.2
- ISBN
- 978-3-9810993-5-5
- Price
- free
Abstract
In this work, we investigated the effect of TEOS and VTMS binders in single walled carbon nanotube(SWNT) solution for imparting selectivity as well as increasing sensitivity to nanotube sensors. Generally binder as organic compound is blended in SWNT solution to adhere to substrate well, and the surface of hydrolyzed binder remain generally functionalized with its own group when it becomes hardened. TEOS and VTMS surrounding SWNTs after hydrolysis remain functionalized to -OH and -CH=CH2 groups, respectively, Therefore, charge transfer between the carbon nanotubes and adsorbed molecules will be affected, changing their overall electrical conductivity. In this experiment the resistance in the sensors using TEOS decreased for increasing alcohol concentration while it increased in the sensors using VTMS.