Influence of operation temperature instability on gas sensor performance

2017 ◽  
Author(s):  
Grzegorz Jasinski
Keyword(s):  
Gas Sensor ◽  
Temperature Instability ◽  
Sensor Performance ◽  
Operation Temperature

scholarly journals Development of Co(OH)xF2−x Nanosheets for Acetone Gas Sensor Applications: Material Characterization and Sensor Performance Evaluation

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 968
Author(s):  
Yaping Yan ◽  
Tae-yil Eom ◽  
Shiyu Xu ◽  
Pil J. Yoo ◽  
Changzeng Yan ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Material Characterization ◽  
High Specific Surface Area ◽  
High Concentration ◽  
Hydrothermal Route ◽  
Sensor Applications ◽  
Sensor Performance ◽  
Operation Temperature ◽  
Catalytic Function ◽  
New Material

This study reports the employment of Co(OH)xF2−x nanosheets, a new material in the sensor field, for gas sensor applications. We synthesize Co(OH)xF2−x nanosheets via a hydrothermal route using SiO2 sphere templates. Our material characterization confirms that the material is a densely clustered Co(OH)xF2−x nanosheet with an amorphous microstructure with some short-range ordering. Sensors based on the nanosheets demonstrate a high response of 269% toward 4.5 ppm of acetone gas at an operation temperature of 200 °C and a very low minimum detection limit of 40 ppb. It functions effectively up to a temperature below 300 °C, above which F is found to start to evaporate. Our discussion suggests that an excellent sensor performance arises from the high catalytic function of F incorporated in a high concentration in the material as well as the high specific surface area due to the morphology of densely clustered nanosheets.

High gas sensor performance of WO3 nanofibers prepared by electrospinning

2021 ◽  
Vol 864 ◽  
pp. 158745
Author(s):  
Paulo V. Morais ◽  
Pedro H. Suman ◽  
Ranilson A. Silva ◽  
Marcelo O. Orlandi
Keyword(s):  
Gas Sensor ◽  
Sensor Performance

scholarly journals Synergistic Effect of Nanocrystalline SnO2 Sensitization by Bimetallic Au and Pd Modification via Ingle Step Flame Spray Pyrolysis Technique

Proceedings ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 46
Author(s):  
Valeriy Krivetskiy ◽  
Konstantin Zamanskiy ◽  
Alina Krotova
Keyword(s):  
Spray Pyrolysis ◽  
Gas Sensor ◽  
Spray Pyrolysis Technique ◽  
Single Step ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Level Control ◽  
Sensor Performance ◽  
Icp Ms ◽  
Composition Structure

Convenient and scalable single step flame spray pyrolysis (FSP) synthesis of bimetal AuPd sensitized nanocrystalline SnO2 for gas sensor application is reported. The materials chemical composition, structure and morphology has been studied by XRD, XPS, HAADFSTEM, BET, ICP-MS techniques as well as thermo-programmed reduction with hydrogen (TPR-H2). Superior gas sensor response of bimetal modified SnO2 towards wide concentration range of reducing (CO, CH4, C3H8, H2S, NH3) and oxidizing (NO2) gases compared to pure and monometallic modified SnO2 is reported. The observed enhanced gas sensor performance is concluded to arise from combination of facilitated oxygen molecule spillover on gold particles and electronic effect of Fermi level control by reoxidizing Pd-PdO clusters, homogeneously distributed over SnO2 particles surface.

Single Tellurium Nanoribbon-Based NOx Gas Sensor

2014 ◽  
Vol 605 ◽  
pp. 290-294
Author(s):  
Hyun Sung Jung ◽  
Chang Yeoul Kim ◽  
Nosang V. Myung
Keyword(s):  
Gas Sensor ◽  
Temperature Sensor ◽  
Electrical Resistance ◽  
Thermal Activation ◽  
Room Temperature ◽  
Temperature Dependent ◽  
Sensing Properties ◽  
Sensor Performance ◽  
Electrochemical Parameters ◽  
Nox Gas Sensor

We investigated sensing properties on NOx (g) of single tellurium (Te) nanoribbon-based nanodevices. The synthesized Te nanoribbons were aligned at well-defined locations using a lithographically patterned nanowire electrodeposition (LPNE) technique. The shape and length were feasibly modified by the designed lithographical pattern, and the width was tailored by the applied electrochemical parameters. Temperature-dependent electrical resistance was analyzed with as-synthesized and annealed Te nanoribbons in the temperature ranging from 15 K to 300 K, where the calculated thermal activation energies of as-synthesized and annealed Te nanoribbons were 35.7 meV and 19.2 meV, respectively. Room-temperature sensor performance of as-synthesized and annealed single Te nanoribbons on detecting NOx (g) was investigated as a function of the tailored concentration of NOx (g). Compared to a sensitivity of 16±2.9% on detecting NOx (g) of 10 ppm in the as-synthesized single Te nanoribbon sensor aligned between Au/Cr electrodes, the sensitivity of 21±3.2% on detecting NOx (g) of 10 ppm at room temperature was demonstrated by single Te nanoribbon-based sensor annealed at 200oC for 1 hour in 5 % H2/N2 (g). The effects of annealing on sensing properties have demonstrated the improved sensitivity in the annealed Te nanoribbons..

Nanogaps controlled by liquid nitrogen freezing and the effects on hydrogen gas sensor performance

2013 ◽  
Vol 192 ◽  
pp. 140-144 ◽  
Author(s):  
Taehoo Chang ◽  
Hwaebong Jung ◽  
Byungjin Jang ◽  
Junmin Lee ◽  
Jin-Seo Noh ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Liquid Nitrogen ◽  
Hydrogen Gas ◽  
Sensor Performance
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