期刊
MATERIALS TODAY COMMUNICATIONS
卷 26, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtcomm.2020.101770
关键词
QCM; Sensing stability; Butanol; Degradation; Gas sensor; Device reliability
资金
- Ministry of Research, Technology
- National Research Innovation Agency of the Republic of Indonesia [2001/UN1/DITLIT/DIT-LIT/PT/2020]
- Lower Saxony Ministry for Science and Culture (N-MWK)
- Ministry of Research and Technology/National Research and Innovation Agency of Republic Indonesia (Kemenristek/BRIN)
This study evaluated the stability of a butanol vapor sensor constructed using PVAc nanofibers, finding that frequency shift decreases by approximately 7% after 100 tests. The main cause of performance degradation was the reduction of active membrane surface area due to nanofiber swelling.
Stability is one of the crucial sensor properties to be applicable in real condition and yet hardly investigated. In this communication, we evaluated the stability of butanol vapor sensors that were constructed using quartz crystal microbalance (QCM) platforms coated with electrospun polyvinyl acetate (PVAc) nanofibers. The reliability test was performed by monitoring the sensor frequency characteristics in a long-term measurement, in which the frequency shift was found to decrease by similar to 7% after the sensors have been tested for 100 times. This performance degradation was mainly attributed to the reduction of active membrane surface area caused by swelling of the nanofibers, which was confirmed by scanning electron microscopy (SEM) images. This finding does not only allow us to better understand the nanofiber-coated QCM sensor limitation and degradation process, but also to design appropriate strategies for mitigating the device stability issues.
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