Cart (Loading....) | Create Account
Close category search window
 

Behavior of single-walled carbon nanotube-based gas sensor at various conditions of operation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Hong-Quang Nguyen ; Dept. of Mater. Sci. & Metall., Kyungpook Nat. Univ., Daegu, South Korea ; Van-Trinh Mai ; Jeung-Soo Huh

A single-walled carbon nanotubes (SWNTs)-based gas sensor, fabricated by screen-printing method, was employed for ammonia (NH3) detection at room temperature. Upon exposure to NH3 gas, the resistance of the sensor positively increased. The sensor could detect NH3 at a concentration as low as 5 ppm at room temperature with a response time of 10 minutes. When the NH3 concentration increased, a saturation of the sensor sensitivity seemed to reach at 40ppm. Exceeding to 40ppm concentration, the sensitivity continued to rapidly increase. The effect of various operation conditions on the behavior of the SWNT-based gas sensor was reported. When the sensor was heated from room temperature up to 400°C, a transition from semiconducting into metallic behavior eventually took place. The sensor sensitivity was affected by operating temperature. The higher temperature the sensor operated at, the lower sensitivity it exhibited. By choosing a suitable regime of operation, in which the carrier gas flux, the heating temperature and heating time were appropriately controlled, the performance of the sensor was significantly improved in comparison with other sensors at the same type.

Published in:

Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05. The 13th International Conference on  (Volume:2 )

Date of Conference:

5-9 June 2005

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.