Researchers at George Washington university have developed a novel method to detect gaseous environmental pollutants using 2D material-based gas sensor arrays, with surface acoustic wave to increase performance. With the increased demand for environmental protection, the need for even more accurate gaseous sensor arrays cannot be overlooked and is in high demand. This method in comparison with traditional chemiresistor sensor-based method has shown to have exceptional performance under room temperature and have shown to demonstrate promising physical, electrical and optical properties. This method overcomes all shortcomings of other 2D materials arrays systems already in service and with the additional benefit of reducing test times dramatically.
The mechanism of operation makes use of detection of charge transfer between gas molecules and 2D material. An external electric field is used to enhance the performance of the process. Our Tests have also shown high correlation between frequency and wavelength of the field being used.
Applications:
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Detection of environmental pollution especially toxic chemicals
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Can be used in industrial, agricultural, and public health sectors
Advantages:
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Can detect different gases with low concentration (Down to 1ppm)
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Can be operated at different temperatures.
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Sensor device is light, flexible, low cost and stable
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Ease of operation
