文章基本信息

标题：Anhydrobiotic chironomid larval motion-based multi-sensing microdevice for the exploration of survivable locations
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作者：Yo Tanaka ; Doudou Ma ; Satoshi Amaya 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2022
卷号：25
期号：8
页码：1-16
DOI：10.1016/j.isci.2022.104639
语种：English
出版社：Elsevier
摘要：SummaryAfrican chironomid (Polypedilum vanderplanki) larvae can suspend their metabolism by undergoing severe desiccation and then resume this activity by simple rehydration. We present a microdevice using interdigital comb electrodes to detect the larval motion using the natural surface charge of the living larvae in water. The larvae were most active 2 h after soaking them in water at 30°C; they exhibited motions with 2 Hz frequency. This was comparable to the signal obtained from the microdevice via fast Fourier transform (FFT) processing. The amplitude of the voltage and current were 0.11 mV and 730 nA, respectively. They would be enough to be detected by a low power consumption microcomputer. Temperature and pH sensing were demonstrated by detecting the vital motions of the revived larvae under different conditions. This multi-functional biosensor will be a useful microdevice to search for survivable locations under extreme environmental conditions like those on other planets.Graphical abstractDisplay OmittedHighlights•A biosensor using anhydrobiotic chironomid larva was created•Interdigital comb electrodes were fabricated to detect the larvae motion•Multi-parameters such as temperature or pH can be detected•The device can search survivable locations under extreme environmental conditionsSensor; Animal physiology; Nanotechnology; Space sciences