期刊
IEEE SENSORS JOURNAL
卷 20, 期 20, 页码 12096-12101出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2020.2999378
关键词
Silicon; Chemical sensors; Surface acoustic waves; Surface treatment; Gas detectors; Chemicals; Carboxyphenylboronic acid; detection; dimethyl methylphosphonate; modification; sensor; silicon nanowire
资金
- National Key Research and Development Program of China [2018YFA0208500, 2017YFA0207103]
In this paper, we propose a new strategy for the sensitive and specific detections of dimethyl methylphosphonate (DMMP), as a simulant of nerve agent Sarin. Our silicon nanowire based sensor is modified with carboxyphenylboronic acid (CPBA) to demonstrate great efficiency. The response time is less than 100 seconds to recognize the DMMP, which is a key ability for on-site monitoring. The sensor exhibits a good reversibility during the repeated measurements between DMMP vapor and air. The sensor still performs well after being exposed in high concentration of DMMP vapor with excellent recovery for 3 times. The sensor is demonstrated to have a linear behavior in detecting DMMP within the concentration of 13 similar to 65 ppm in gaseous phase with the limit of detection (LOD) of 100 ppb. It is expected that the proposed sensor enables the testing system accurate, rapid, sensitive and reversible for on-site detection of nerve agents in the future.
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