scholarly journals Nitrogen Monoxide Gas Sensing Characteristics of Transparent p-type Semiconductor CuAlO2Thin Films

2013 ◽  
Vol 23 (9) ◽  
pp. 477-482
Author(s):  
Soo-Jeong Park ◽  
Hyojin Kim ◽  
Dojin Kim
Keyword(s):  
Gas Sensing ◽  
Nitrogen Monoxide ◽  
Type Semiconductor ◽  
P Type ◽  
Sensing Characteristics

Preparation, Characterization and Nox Sensing Characteristics of Sensor Grade CuInO2 Thin Films

2012 ◽  
Vol 710 ◽  
pp. 727-732
Author(s):  
E. Prabhu ◽  
K.I. Gnanasekar ◽  
V. Jayaraman ◽  
T. Gnanasekaran
Keyword(s):  
Thin Film ◽  
Gas Sensing ◽  
Operating Temperature ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Deposition Parameters ◽  
Type Semiconductor ◽  
P Type ◽  
Sensing Characteristics ◽  
Film Form

CuInO2phase, a p-type semi-conducting oxide was successfully stabilized in thin film form by pulsed laser deposition technique and the deposition parameters were optimized. The gas sensing studies carried out on thin film of CuInO2for different concentrations of NOxexhibited a decrease in resistance, a characteristic of p-type semiconductor. The thin film responded to 4 vppm of NOxin air. The CuInO2thin film did not respond to trace levels of hydrogen, ammonia and petroleum gas at this operating temperature and thus offering selectivity to NOx.

The blue luminescence of p-type NiO nanostructured material induced by defects: H2S gas sensing characteristics at a relatively low operating temperature

2020 ◽  
Vol 525 ◽  
pp. 146002 ◽  
Author(s):  
Teboho P. Mokoena ◽  
Zamaswazi P. Tshabalala ◽  
Kenneth T. Hillie ◽  
Hendrik C. Swart ◽  
David E. Motaung
Keyword(s):  
Gas Sensing ◽  
Operating Temperature ◽  
Nanostructured Material ◽  
Blue Luminescence ◽  
P Type ◽  
Sensing Characteristics

Highly sensitive and selective room-temperature NO2 gas-sensing characteristics of SnOX-based p-type thin-film transistor

2019 ◽  
Vol 288 ◽  
pp. 625-633 ◽  
Author(s):  
Hwan-Seok Jeong ◽  
Min-Jae Park ◽  
Soo-Hun Kwon ◽  
Hyo-Jun Joo ◽  
Hyuck-In Kwon
Keyword(s):  
Thin Film ◽  
Room Temperature ◽  
Gas Sensing ◽  
Thin Film Transistor ◽  
Highly Sensitive ◽  
P Type ◽  
Sensing Characteristics

Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics

2020 ◽  
Vol 253 ◽  
pp. 123316 ◽  
Author(s):  
Teboho P. Mokoena ◽  
Kenneth T. Hillie ◽  
Hendrik C. Swart ◽  
Nompumelelo Leshabane ◽  
James Tshilongo ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Oxide Nanostructures ◽  
P Type ◽  
Sensing Characteristics ◽  
Type Nickel

Gas sensing characteristics of p-type Cr2O3 and Co3O4 nanofibers depending on inter-particle connectivity

2014 ◽  
Vol 202 ◽  
pp. 263-271 ◽  
Author(s):  
Ji-Wook Yoon ◽  
Hyo-Joong Kim ◽  
Hyun-Mook Jeong ◽  
Jong-Heun Lee
Keyword(s):  
Gas Sensing ◽  
P Type ◽  
Sensing Characteristics

scholarly journals The Effect of CH4 and CO2 Exposure on Carbon Nanotubes Electrical Resistance

2011 ◽  
Vol 214 ◽  
pp. 655-661 ◽  
Author(s):  
Amin Firouzi ◽  
Shafreeza Sobri ◽  
Faizah Mohd Yasin ◽  
Fakhru'l Razi Ahmadun
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Resistance ◽  
Gas Sensing ◽  
Quartz Substrate ◽  
Chemical Vapor ◽  
High Sensitivity ◽  
Sensing Applications ◽  
Type Semiconductor ◽  
Adsorption Of Co2 ◽  
P Type

This research was carried out to monitor and investigate the gas sensing effects on carbon nanotubes (CNTs) by a systematic study of the variations in the electrical resistance as sensor signal induced by adsorption of CO2 and CH4 gaseous molecules. The CNTs were synthesized by Floating Catalyst Chemical Vapor Deposition (FC-CVD) method on quartz substrate under benzene bubble at temperature of 700°C. Then, they were tested for gas sensing applications operating at room temperature. Upon exposure to gaseous molecules, the electrical resistance of CNTs dramatically increased for both CO2 and CH4 gases with short response time and high sensitivity. It was also observed that the CNTs device behaves as a p-type semiconductor when exposed to gaseous molecules. In addition, the recovery of the sensors and mechanism of gas sensing procedure are discussed.

scholarly journals Improvement of NO Gas Sensing Properties of Polyaniline/MWCNT Composite by Photocatalytic Effect of TiO2

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Jumi Yun ◽  
Sonyeo Jeon ◽  
Hyung-Il Kim
Keyword(s):  
Carbon Nanotube ◽  
Electrical Resistance ◽  
Gas Sensing ◽  
Photocatalytic Effect ◽  
Highly Sensitive ◽  
Gas Sensing Properties ◽  
Nanotube Composites ◽  
Type Semiconductor ◽  
P Type ◽  
Coated Carbon

The highly sensitive and rapid NO gas sensor was prepared with polyaniline/TiO2/carbon nanotube composites. Aniline was polymerized on the surface of carbon nanotube (p-type semiconductor) with embedding TiO2. The gas sensing property was measured by the changes of electrical resistance without or with UV irradiation to investigate the photodegradation of NO by TiO2. The photo-degraded products such as HNO2, NO2, and HNO3, which were adsorbed on the PANi-coated carbon nanotubes, resulted in the decreased electrical resistance in the p-type semiconductors of carbon nanotube and polyaniline. The advantages of TiO2photocatalyst in gas sensing were apparent in the improvement in both sensitivity and response rate.

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