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

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.

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 Hydrothermal Growth and Hydrogen Selective Sensing of Nickel Oxide Nanowires

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Thi Thanh Le Dang ◽  
Matteo Tonezzer ◽  
Van Hieu Nguyen
Keyword(s):  
Electron Microscopy ◽  
Gas Sensing ◽  
Low Cost ◽  
Hydrogen Sensor ◽  
Nanostructured Material ◽  
Liquefied Petroleum Gas ◽  
Semiconducting Nanowires ◽  
Response And Recovery ◽  
Nanostructured Metal Oxides ◽  
P Type

Low cost synthesis of nanostructured metal oxides for gas sensing application at low temperature is nowadays of crucial importance in many fields. Herein, NiO p-type semiconducting nanowires with polycrystalline structure were prepared by a facile and scalable hydrothermal method. Morphology and crystal structure of the NiO nanowires were investigated by scan electron microscopy, X-ray diffraction, and transmission electron microscopy. The nanostructured material was then tested as hydrogen sensor showing very good performance in terms of sensor response, stability, absence of drifts, and speed of response and recovery. The selectivity of the NiO sensor to hydrogen towards other gases (ethanol, ammonia, and liquefied petroleum gas) was found to be good.

scholarly journals Effects of Niobium-Loading on Sulfur Dioxide Gas-Sensing Characteristics of Hydrothermally Prepared Tungsten Oxide Thick Film

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Viruntachar Kruefu ◽  
Anurat Wisitsoraat ◽  
Sukon Phanichphant
Keyword(s):  
Spin Coating ◽  
Gas Sensing ◽  
Operating Temperature ◽  
Sensor Response ◽  
X Ray Diffraction ◽  
Optimal Operating ◽  
Impregnation Process ◽  
X Ray ◽  
Transmission Electron ◽  
Sensing Characteristics

Nb-loaded hexagonal WO3nanorods with 0–1.0 wt% loading levels were successfully synthesized by a simple hydrothermal and impregnation process and characterized for SO2sensing. Nb-loaded WO3sensing films were produced by spin coating on alumina substrate with interdigitated gold electrodes and annealed at 450°C for 3 h in air. Structural characterization by X-ray diffraction, high-resolution transmission electron microscopy, and Brunauer-Emmett-Teller analysis showed that spherical, oval, and rod-like Nb nanoparticles with 5–15 nm mean diameter were uniformly dispersed on hexagonal WO3nanorods with 50–250 nm diameter and 100 nm–5 µm length. It was found that the optimal Nb loading level of 0.5 wt% provides substantial enhancement of SO2response but the response became deteriorated at lower and higher loading levels. The 0.50 wt% Nb-loaded WO3nanorod sensing film exhibits the best SO2sensing performances with a high sensor response of ~10 and a short response time of ~6 seconds to 500 ppm of SO2at a relatively low optimal operating temperature of 250°C. Therefore, Nb loading is an effective mean to improve the SO2gas-sensing performances of hydrothermally prepared WO3nanorods.

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