Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device

Abstract Gallium alloy liquid metals (Galinstan) possessing fluidity, electric conductivity, and low toxicity are attractive for use in flexible devices and microfluidic devices. However, the oxide skin of Galinstan in the atmosphere adheres to the microchannel surface, preventing the transportation...

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Autores principales:	Satoshi Konishi, Yugo Kakehi, Fuminari Mori, Shinji Bono
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d45cd0a5a45a4e73b55d0766a53237a1
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spelling	oai:doaj.org-article:d45cd0a5a45a4e73b55d0766a53237a12021-12-02T13:26:28ZSmooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device10.1038/s41598-021-86394-w2045-2322https://doaj.org/article/d45cd0a5a45a4e73b55d0766a53237a12021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86394-whttps://doaj.org/toc/2045-2322Abstract Gallium alloy liquid metals (Galinstan) possessing fluidity, electric conductivity, and low toxicity are attractive for use in flexible devices and microfluidic devices. However, the oxide skin of Galinstan in the atmosphere adheres to the microchannel surface, preventing the transportation of Galinstan in the channel. To tackle the problem of the adhesion of Galinstan to microchannel, we introduced liquid with Galinstan into a channel with a diameter of 1000 μm. Then, we found that the cylindrical shape of the channel enabled smooth transportation of Galinstan independently of both the liquid and the channel material. The liquid introduced with Galinstan not only prevents adhesion but also improves the spatial controllability of Galinstan in the channel. We can control the position of Galinstan with 100 μm resolution using highly viscous (> 10 cSt) liquid. In addition, we combined the microchannel with patterned electrodes, fabricating a serially arranged capacitive device. The local capacitance detected by the patterned electrodes changed by more than 6% via the smooth transportation of Galinstan. The analysis results based on an equivalent circuit quantitatively agree with our experimental results. We can modulate the serially arranged capacitors using the smooth transportation of Galinstan in the channel.Satoshi KonishiYugo KakehiFuminari MoriShinji BonoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Satoshi Konishi Yugo Kakehi Fuminari Mori Shinji Bono Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device
description	Abstract Gallium alloy liquid metals (Galinstan) possessing fluidity, electric conductivity, and low toxicity are attractive for use in flexible devices and microfluidic devices. However, the oxide skin of Galinstan in the atmosphere adheres to the microchannel surface, preventing the transportation of Galinstan in the channel. To tackle the problem of the adhesion of Galinstan to microchannel, we introduced liquid with Galinstan into a channel with a diameter of 1000 μm. Then, we found that the cylindrical shape of the channel enabled smooth transportation of Galinstan independently of both the liquid and the channel material. The liquid introduced with Galinstan not only prevents adhesion but also improves the spatial controllability of Galinstan in the channel. We can control the position of Galinstan with 100 μm resolution using highly viscous (> 10 cSt) liquid. In addition, we combined the microchannel with patterned electrodes, fabricating a serially arranged capacitive device. The local capacitance detected by the patterned electrodes changed by more than 6% via the smooth transportation of Galinstan. The analysis results based on an equivalent circuit quantitatively agree with our experimental results. We can modulate the serially arranged capacitors using the smooth transportation of Galinstan in the channel.
format	article
author	Satoshi Konishi Yugo Kakehi Fuminari Mori Shinji Bono
author_facet	Satoshi Konishi Yugo Kakehi Fuminari Mori Shinji Bono
author_sort	Satoshi Konishi
title	Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device
title_short	Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device
title_full	Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device
title_fullStr	Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device
title_full_unstemmed	Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device
title_sort	smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d45cd0a5a45a4e73b55d0766a53237a1
work_keys_str_mv	AT satoshikonishi smoothtransportationofliquidmetaldropletsinamicrochannelasdetectedbyaseriallyarrangedcapacitivedevice AT yugokakehi smoothtransportationofliquidmetaldropletsinamicrochannelasdetectedbyaseriallyarrangedcapacitivedevice AT fuminarimori smoothtransportationofliquidmetaldropletsinamicrochannelasdetectedbyaseriallyarrangedcapacitivedevice AT shinjibono smoothtransportationofliquidmetaldropletsinamicrochannelasdetectedbyaseriallyarrangedcapacitivedevice
_version_	1718393061679038464

Smooth transportation of liquid metal droplets in a microchannel as detected by a serially arranged capacitive device

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