scholarly journals Influence of Humidity on the Acoustic Properties of Mushroom Mycelium Films Used as Sensitive Layers for Acoustic Humidity Sensors

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2711 ◽  
Author(s):  
Iren Kuznetsova ◽  
Boris Zaitsev ◽  
Larissa Krasnopolskaya ◽  
Andrey Teplykh ◽  
Alexander Semyonov ◽  
...  
Keyword(s):  
Water Vapor ◽  
Least Squares Method ◽  
Water Vapor Adsorption ◽  
Acoustic Properties ◽  
Bulk Acoustic Wave ◽  
Humidity Sensors ◽  
Experimental Frequency ◽  
Elastic Module ◽  
Relative Humidity Range ◽  
Humidity Range

The influence of humidity on the density, shear elastic module, viscosity, and thickness of the mushroom Pleurotus eryngii and Ganoderma lucidum mycelium films was studied. These data were obtained by comparing the theoretical and experimental frequency dependencies of the complex electrical impedance of bulk acoustic wave (BAW) resonator loaded by mycelium film using the least-squares method. This procedure was performed for the BAW resonator with pointed films for the relative humidity range of 17%–56% at the room temperature. As a result, the changes of the density, shear elastic module, viscosity, and thickness of the films under study, due to the water vapor adsorption, were determined. It has been established that the properties of mycelium films are restored after removing from the water vapor. So, these results show the possibility of using investigated mycelium films as sensitive layers for acoustic humidity sensors.

scholarly journals Development of La3+Doped CeO2Thick Film Humidity Sensors

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Chunjie Wang ◽  
Aihua Zhang ◽  
Hamid Reza Karimi
Keyword(s):  
Relative Humidity ◽  
High Performance ◽  
Humidity Sensor ◽  
Humidity Sensors ◽  
Response Recovery ◽  
Relative Humidity Range ◽  
Response And Recovery ◽  
Sensitive Characteristics ◽  
Humidity Range ◽  
Maximum Humidity

The humidity sensitive characteristics of the sensor fabricated from 10 mol% La2O3doped CeO2nanopowders with particle size 17.26 nm synthesized via hydrothermal method were investigated at different frequencies. It was found that the sensor shows high humidity sensitivity, rapid response-recovery characteristics, and narrow hysteresis loop at 100 Hz in the relative humidity range from 11% to 95%. The impedance of the sensor decreases by about five orders of magnitude as relative humidity increases. The maximum humidity hysteresis is about 6% RH, and the response and recovery time is 12 and 13 s, respectively. These results indicate that the nanosized La2O3doped CeO2powder has potential application as high-performance humidity sensor.

Water vapor adsorption on metal-exchanged hierarchical porous zeolite-Y

2021 ◽  
pp. 111380
Author(s):  
Aasif A. Dabbawala ◽  
K. Suresh kumar Reddy ◽  
Hemant Mittal ◽  
Yasser Al Wahedi ◽  
Balasubramanian V. Vaithilingam ◽  
...  
Keyword(s):  
Water Vapor ◽  
Zeolite Y ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption ◽  
Hierarchical Porous

Bi-wetting property of oil sands fine solids determined by film flotation and water vapor adsorption

Fuel ◽  
2017 ◽  
Vol 197 ◽  
pp. 326-333 ◽  
Author(s):  
Cheng Wang ◽  
Qi Liu ◽  
Douglas G. Ivey ◽  
Thomas H. Etsell
Keyword(s):  
Water Vapor ◽  
Oil Sands ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption ◽  
Wetting Property

Production of Activated Carbon for Water Vapor Adsorption by KOH and NaOH Activation

2006 ◽  
Vol 32 (2) ◽  
pp. 186-189 ◽  
Author(s):  
Jun Kobayashi ◽  
Takahiro Imamura ◽  
Masaaki Ichikawa ◽  
Mitsuhiro Kubota ◽  
Fujio Watanabe ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Vapor ◽  
Water Vapor Adsorption ◽  
Vapor Adsorption

Pore structure analysis by water vapor adsorption. IV. Analysis of hydrated portland cement pastes of low porosity

1972 ◽  
Vol 38 (1) ◽  
pp. 265-276 ◽  
Author(s):  
Ivan Odler ◽  
Julius Hagymassy ◽  
Marvin Yudenfreund ◽  
Kaissar M Hanna ◽  
Stephen Brunauer
Keyword(s):  
Water Vapor ◽  
Portland Cement ◽  
Pore Structure ◽  
Structure Analysis ◽  
Water Vapor Adsorption ◽  
Cement Pastes ◽  
Vapor Adsorption ◽  
Low Porosity ◽  
Pore Structure Analysis
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