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2017 ; 4
(5
): 1700024
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Liquid Metal Phagocytosis: Intermetallic Wetting Induced Particle
Internalization
#MMPMID28546916
Tang J
; Zhao X
; Li J
; Zhou Y
; Liu J
Adv Sci (Weinh)
2017[May]; 4
(5
): 1700024
PMID28546916
show ga
A biomimetic cellular-eating phenomenon in gallium-based liquid metal to realize
particle internalization in full-pH-range solutions is reported. The effect,
which is called liquid metal phagocytosis, represents a wet-processing strategy
to prepare various metallic liquid metal-particle mixtures through introducing
excitations such as an electrical polarization, a dissolving medium, or a
sacrificial metal. A nonwetting-to-wetting transition resulting from surface
transition and the reactive nature of the intermetallic wetting between the two
metallic phases are found to be primarily responsible for such particle-eating
behavior. Theoretical study brings forward a physical picture to the problem,
together with a generalized interpretation. The model developed here, which uses
the macroscopic contact angle between the two metallic phases as a criterion to
predict the particle internalization behavior, shows good consistency with
experimental results.