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Micromachined silicon microcantilevers for gas sensing applications with capacitive read-out
The design and fabrication of a simple and low-cost micromachined silicon capacitive device is reported. Application to the detection of volatile organic compounds (VOCs) based on capacitive variations due to induced differential surface stress is presented. Good results in terms of sensitivity, rep...
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Published in: | Sensors and actuators. B, Chemical Chemical, 2005-11, Vol.111 (Complete), p.247-253 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The design and fabrication of a simple and low-cost micromachined silicon capacitive device is reported. Application to the detection of volatile organic compounds (VOCs) based on capacitive variations due to induced differential surface stress is presented. Good results in terms of sensitivity, reproducibility and response and recuperation times have been obtained with this type of devices. Limits of detection (LoDs) for the measured gases are below 50
ppm for toluene and 10
ppm for octane. The responses to the tested gases are different thus we would be able to discriminate a mixture of them. |
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ISSN: | 0925-4005 1873-3077 |
DOI: | 10.1016/j.snb.2005.07.053 |