NO x gas detection characteristics in FET-type multi-walled carbon nanotube-based gas sensors for various electrode spacings

2016 ◽  
Vol 68 (6) ◽  
pp. 797-802 ◽  
Author(s):  
Hyun Soo Kim ◽  
Kyung Uk Jang ◽  
Tae Wan Kim
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensors ◽  
Gas Detection ◽  
Multi Walled Carbon Nanotube ◽  
Detection Characteristics

H2 Gas Sensor Based on Pd-Loaded Carbon Nanotube Film

2020 ◽  
Vol 20 (7) ◽  
pp. 4470-4473
Author(s):  
Maeum Han ◽  
Jae Keon Kim ◽  
Junyeop Lee ◽  
Hee Kyung An ◽  
Jong Pil Yun ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensors ◽  
Room Temperature ◽  
Pd Nanoparticles ◽  
Gas Detection ◽  
Structural Flexibility ◽  
Bending Tests ◽  
Multi Walled Carbon Nanotube ◽  
Reliable Detection ◽  
Detection Characteristics

Palladium-coated multi-walled carbon nanotube (Pd-MWCNT) nanocomposites have been experimentally proven to show highly improved hydrogen (H2) gas detection characteristics at room temperature when compared with single MWCNTs. In this context, we develop an efficient and convenient method for forming nanocomposites by coating Pd nanoparticles on an MWCNT film. Furthermore, we test the applicability of the nanocomposites as sensing materials in detecting H2 gas at room temperature in a reliable and sensitive manner in contrast with ordinary metal-oxidebased gas sensors that operate at high temperatures. We first study the detection efficacy of the Pd-MWCNT film relative to pure MWCNT film. Subsequently, we investigate the Pd-MWCNT sensor’s sensitivity over time for different gas concentrations, the sensor response time, and sensor reproducibility and reliability under various conditions including bending tests. Our sensor exhibits stable reliable detection characteristics and excellent structural flexibility.

scholarly journals INVESTIGATION OF SENSITIVITY AND SELECTIVITY OF MWCNT–BASED SENSOR FOR AMMONIAC GAS DETECTION AT ROOM TEMPERATURE

2012 ◽  
Vol 15 (2) ◽  
pp. 62-69
Author(s):  
Lich Quang Nguyen ◽  
Tu Cong Nguyen ◽  
Anh Tuan Ly ◽  
Thanh Phuc Tran ◽  
Pho Quoc Phan ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Vapor Deposition ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Gas Detection ◽  
Cvd Method ◽  
Sensor Device ◽  
Pt Electrodes ◽  
Multi Walled Carbon Nanotube ◽  
Sensitivity And Selectivity

Gas sensors based on multi-walled carbon nanotube (MWCNT) for detecting gaseous molecules of ammoniac (NH3) were developed and investigated. MWCNT film was grown directly by chemical vapor deposition (CVD) method on Pt electrodes to fabricate sensor device. The CNT based – gas sensor is shown sensitively and selectively to NH3 gas at room temperature.

Multi-walled carbon nanotube-based gas sensors for NH3 detection

2004 ◽  
Vol 13 (4-8) ◽  
pp. 1327-1332 ◽  
Author(s):  
S.G. Wang ◽  
Qing Zhang ◽  
D.J. Yang ◽  
P.J. Sellin ◽  
G.F. Zhong
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensors ◽  
Multi Walled Carbon Nanotube

Development of carbon nanotube-based gas sensors for NOx gas detection working at low temperature

2008 ◽  
Vol 40 (7) ◽  
pp. 2272-2277 ◽  
Author(s):  
T. Ueda ◽  
M.M.H. Bhuiyan ◽  
H. Norimatsu ◽  
S. Katsuki ◽  
T. Ikegami ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Low Temperature ◽  
Gas Sensors ◽  
Gas Detection

Carbon Nanotube Based Microwave Resonator Gas Sensors

2006 ◽  
Vol 16 (04) ◽  
pp. 913-935 ◽  
Author(s):  
M. P. McGRATH ◽  
A. PHAM
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Resonant Frequency ◽  
Gas Sensors ◽  
Gas Detection ◽  
Wireless Sensing ◽  
Microwave Resonator ◽  
Network Applications ◽  
Sensor Platform ◽  
Carbon Nanotube Resonator

This paper reviews our work on the development of microwave carbon nanotube resonator sensors for gas detection. The sensor consists of a radio frequency resonator coated with a layer of carbon nanotubes. Upon exposure to gasses, the resonant frequency of the sensor shifts to indicate the presence of gasses. Our experimental results demonstrate that the microwave carbon nanotube resonator sensor achieves a sensitivity of 4000 Hz/ppm upon exposure to ammonia and the resonant frequency is recovered when ammonia is evacuated. The sensing mechanism is dependent on electron transfer from the ammonia to the nanotubes. This sensor platform has great potential for wireless sensing network applications.

scholarly journals Effects of Operating Temperature on Droplet Casting of Flexible Polymer/Multi-Walled Carbon Nanotube Composite Gas Sensors

Sensors ◽  
2016 ◽  
Vol 17 (12) ◽  
pp. 4 ◽  
Author(s):  
Jin-Chern Chiou ◽  
Chin-Cheng Wu ◽  
Yu-Chieh Huang ◽  
Shih-Cheng Chang ◽  
Tse-Mei Lin
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensors ◽  
Operating Temperature ◽  
Flexible Polymer ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Composite
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