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Kim, Gun-Ho
SoftHeat Group
Research Interests
  • Heat transfer mechanism in soft materials (e.g., plastics, animal tissues)
  • Development of thermally conductive plastics and high performance polymeric thermoelectric heat engine
  • Development of biomedical devices that use responses of animals to environmental temperature changes

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A general approach to composites containing nonmetallic fillers and liquid gallium

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Title
A general approach to composites containing nonmetallic fillers and liquid gallium
Author
Wang, ChunhuiGong, YanCunning, Benjamin, VLee, SeunghwanLe, QuanJoshi, Shalik R.Buyukcakir, OnurZhang, HanyangSeong, Won KyungHuang, MingWang, MeihuiLee, JaeseonKim, Gun-HoRuoff, Rodney S.
Issue Date
2021-01
Publisher
American Association for the Advancement of Science
Citation
SCIENCE ADVANCES, v.7, no.1, pp.eabe3767
Abstract
We report a versatile method to make liquid metal composites by vigorously mixing gallium (Ga) with non-metallic particles of graphene oxide (G-O), graphite, diamond, and silicon carbide that display either paste or putty-like behavior depending on the volume fraction. Unlike Ga, the putty-like mixtures can be kneaded and rolled on any surface without leaving residue. By changing temperature, these materials can be stiffened, softened, and, for the G-O-containing composite, even made porous. The gallium putty (GalP) containing reduced G-O (rG-O) has excellent electromagnetic interference shielding effectiveness. GalP with diamond filler has excellent thermal conductivity and heat transfer superior to a commercial liquid metal-based thermal paste. Composites can also be formed from eutectic alloys of Ga including Ga-In (EGaIn), Ga-Sn (EGaSn), and Ga-In-Sn (EGaInSn or Galinstan). The versatility of our approach allows a variety of fillers to be incorporated in liquid metals, potentially allowing filler-specific "fit for purpose" materials.
URI
https://scholarworks.unist.ac.kr/handle/201301/53876
URL
https://www.science.org/doi/10.1126/sciadv.abe3767
DOI
10.1126/sciadv.abe3767
ISSN
2375-2548
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