2024
DOI: 10.1002/adfm.202422453
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Tunable Infrared Emissivity Using Laser‐Sintered Liquid Metal Nanoparticle Films

Sooik Im,
Ethan Frey,
Do Hyeon Kim
et al.

Abstract: This paper describes laser exposure to tune the infrared (IR) emissivity of a film of eutectic gallium indium (EGaIn) particles. EGaIn – a liquid metal at room temperature – forms a native oxide that keeps particles of the metal from spontaneously percolating. Photothermal energy from a CO2 laser percolates the particles into a conductive network. Here, it also causes a decrease in the IR emissivity of the film of particles from 0.4 to 0.24 over the range of 7.5–13 µm wavelength (measured by an IR camera) with… Show more

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