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A quartz crystal microbalance modified with carbon nanotubes as a sensor for volatile organic compounds
A piezoelectric quartz crystal microbalance (PQCM) was modified with multi-walled carbon nanotubes (MWCNTs) to develop a chemically based sensor for measurements other than the typical mass change in the quartz crystal. Slight conductivity changes in the carbon nanotubes are amplified to obtain a vi...
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Published in: | Sensors and actuators. B, Chemical Chemical, 2013-09, Vol.186, p.811-816 |
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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: | A piezoelectric quartz crystal microbalance (PQCM) was modified with multi-walled carbon nanotubes (MWCNTs) to develop a chemically based sensor for measurements other than the typical mass change in the quartz crystal. Slight conductivity changes in the carbon nanotubes are amplified to obtain a vibrational frequency signal in the crystal. A commercially available quartz crystal microbalance was modified by replacing its electrode with MWCNTs to obtain a sensor with high sensitivity, selectivity, robustness and stability over time. The modified microbalance was successfully used to determine various types of analytes including volatile organic compounds (VOCs), aldehydes and amines. |
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ISSN: | 0925-4005 1873-3077 |
DOI: | 10.1016/j.snb.2013.06.081 |