Microchannel Structural Design For a Room-Temperature Liquid Metal Based Super-stretchable Sensor.

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ID: 91604
2019
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Abstract
Room-temperature liquid metal has been widely used in flexible and stretchable sensors, focusing on embedding liquid metal in microchannels, liquid metal microdroplets formation, captive sensors, and liquid metal nanoparticles, etc. In this paper, a facile Eutectic Galium-Indium (EGaln) liquid-based microfluidic high-sensitivity, skin-mountable, and ultra-soft stretchable sensor is developed. It comprises Ecoflex microfluidic assembly filled with EGaln, which serves as the working fluid of the stretchable sensor. The lithography method is applied to achieve microfluidic channel. The microfluidic channel is optimized by using topology method and finite element analysis, making this device with high conformability and high stretchability. This method achieved an outstanding effect on elastomer-encapsulated strain gauge, which displays an approximately linear behavior with a gauge factor (GF). The GF could reach as high as 4.95 when the strain ultimately reached 550%. Applications of detection of the joints, fingers, and wrists has been conducted and showed excellent results. This work can further facilitate the exploration and potential realization of a functional liquid-state device technology with superior mechanical flexibility and conformability.
Reference Key
gao2019microchannelscientific Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gao, Qinwu;Li, Hui;Zhang, Jinjie;Xie, Zhenwen;Zhang, Jinyong;Wang, Lei;
Journal Scientific reports
Year 2019
DOI
10.1038/s41598-019-42457-7
URL
Keywords
plant functional traits exudates grassland community liquid chromatography coupled to mass spectrometry semi‐polar metabolites untargeted metabolite profiling

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