scholarly journals The Heterostructures of CuO and SnOx for NO2 Detection

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4387
Author(s):  
Anna Paleczek ◽  
Bartłomiej Szafraniak ◽  
Łukasz Fuśnik ◽  
Andrzej Brudnik ◽  
Dominik Grochala ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Air Pollutants ◽  
Operating Temperature ◽  
Pollution Level ◽  
Electrical Behavior ◽  
Wide Range ◽  
Real Time Information ◽  
Time Information ◽  
Lower Operating Temperature ◽  
No2 Detection

Controlling environmental pollution is a burning problem for all countries more than ever. Currently, due to the increasing industrialization, the number of days when the limits of air pollutants are over the threshold levels exceeds 80–85% of the year. Therefore, cheap and effective sensors are always welcome. One idea is to combine such solutions with cars and provide real-time information about the current pollution level. However, the environmental conditions are demanding, and thus the developed sensors need to be characterized by the high 3S parameters: sensitivity, stability and selectivity. In this paper, we present the results on the heterostructure of CuO/SnOx and SnOx/CuO as a possible approach for selective NO2 detection. The developed gas sensors exhibited lower operating temperature and high response in the wide range of NO2 and in a wide range of relative humidity changes. Material characterizations and impedance spectroscopy measurements were also conducted to analyze the chemical and electrical behavior.

Synthesis and Harmful Gas Sensing Properties of Zinc Oxide Modified Multi-Walled Carbon Nanotubes Composites

2014 ◽  
Vol 1044-1045 ◽  
pp. 172-175 ◽  
Author(s):  
Muhammad Iqbal ◽  
Embun Marintan ◽  
Ni Luh Wulan Septiani ◽  
Suyatman ◽  
Ahmad Nuruddin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Zinc Oxide ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Operating Temperature ◽  
Performance Testing ◽  
Sensitive Layer ◽  
Multi Walled Carbon Nanotubes ◽  
Operating Temperatures ◽  
Lower Operating Temperature

Metal oxide semiconductors materials such as zinc oxide (ZnO) are often used in the fabrication of chemoresistive gas sensors, but ZnO materials require high operating temperatures to operate. In another side, carbon nanotubes (CNT) have many distinct properties and recently have been exploited as the next generation of sensors, including chemoresisitive type gas sensors. This study was aimed to investigate the performance of MWNT-ZnO composites as SO2 gas sensitive layer. By fabricate composites of MWNT and ZnO, have been obtained a sensitive layer that can be utilized for application as gas sensitive layer with relatively lower operating temperature. A sensitive layer of MWNT-ZnO based composites have been successfully fabricated on a alumina substrate and several characterization techniques has been performed, i.e. XRD, SEM and EDS to study the formed crystalline phase, the morphology of the nanostructures, and the elemental composition of synthesized composites. MWNT-ZnO sensitive layer was tested by exposure to SO2 gas at various operating temperatures and gas concentration. From the performance testing results, it could be found that the composite materials have a prospective as a gas sensor at lower operating temperature with short response time and good sensitivity.

VLSI DESIGN OF PIPELINED ADC WITH WIDE RANGE OPERATING TEMPERATURE FOR WAVE APPLICATIONS

2017 ◽  
Vol 6 (2) ◽  
pp. 13
Author(s):  
P LOKESH ◽  
U. SOMALATHA ◽  
S. CHANDANA ◽  
◽  
◽  
...  
Keyword(s):  
Operating Temperature ◽  
Vlsi Design ◽  
Pipelined Adc ◽  
Wide Range

Potential Urban Rainfall Prediction Measurement System

1984 ◽  
Vol 16 (8-9) ◽  
pp. 349-362 ◽  
Author(s):  
John L Vogel
Keyword(s):  
Real Time ◽  
The United States ◽  
Monitoring Systems ◽  
Climatic Region ◽  
Convective Storm ◽  
Rainfall Prediction ◽  
Water Quality Regulations ◽  
General Data ◽  
Real Time Information ◽  
Time Information

Continued growth of urban regions and more stringent water quality regulations have resulted in an increased need for more real-time information about past, present, and future patterns and intensities of precipitation. Detailed, real-time information about precipitation can be obtained using radar and raingages for monitoring and prediction of precipitation amounts. The philosophy and the requirements for the development of real-time radar prediction-monitoring systems are described for climatic region similar to the Midwest of the united States. General data analysis and interpretation techniques associated with rainfall from convective storm systems are presented.

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