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A Handy Flexible Micro-Thermocouple Using Low-Melting-Point Metal Alloys.


ABSTRACT: A handy, flexible micro-thermocouple using low-melting-point metal alloys is proposed in this paper. The thermocouple has the advantages of simple fabrication and convenient integration. Bismuth/gallium-based mixed alloys are used as thermocouple materials. To precisely inject the metal alloys to the location of the sensing area, a micro-polydimethylsiloxane post is designed within the sensing area to prevent outflow of the metal alloy to another thermocouple pole during the metal-alloy injection. Experimental results showed that the Seebeck coefficient of this thermocouple reached -10.54 μV/K, which was much higher than the previously reported 0.1 μV/K. The thermocouple was also be bent at 90° more than 200 times without any damage when the mass ratio of the bismuth-based alloy was <60% in the metal-alloy mixture. This technology mitigated the difficulty of depositing traditional thin⁻film thermocouples on soft substrates. Therefore, the thermocouple demonstrated its potential for use in microfluidic chips, which are usually flexible devices.

SUBMITTER: Wang Q 

PROVIDER: S-EPMC6359204 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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A Handy Flexible Micro-Thermocouple Using Low-Melting-Point Metal Alloys.

Wang Qifu Q   Gao Meng M   Zhang Lunjia L   Deng Zhongshan Z   Gui Lin L   Gui Lin L  

Sensors (Basel, Switzerland) 20190114 2


A handy, flexible micro-thermocouple using low-melting-point metal alloys is proposed in this paper. The thermocouple has the advantages of simple fabrication and convenient integration. Bismuth/gallium-based mixed alloys are used as thermocouple materials. To precisely inject the metal alloys to the location of the sensing area, a micro-polydimethylsiloxane post is designed within the sensing area to prevent outflow of the metal alloy to another thermocouple pole during the metal-alloy injectio  ...[more]

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