Reconfigurable Assembly of Active Liquid Metal Colloidal Cluster.
Angew Chem Int Ed Engl
; 59(45): 19884-19888, 2020 Nov 02.
Article
en En
| MEDLINE
| ID: mdl-33448587
ABSTRACT
We report the reconfigurable assembly of rod-shaped eutectic gallium-indium alloy (EGaIn) liquid metal colloidal motors by mimicking the growth behavior of a dandelion. EGaIn nanorods with a diameter of 210â
nm and a length of 850â
nm were synthesized via an ultrasound-assisted physical dispersion method. The nanorods possess a core-shell structure with a 30â
nm GaOOH shell and zero-valent liquid core. The EGaIn motors move autonomously at a speed of 41.2â
µm s-1 under an acoustic field. By modulating the frequency of the applied acoustic field, the EGaIn colloidal motors self-organize into various striped and circular patterns, followed by a flower-like cluster. The dandelion-like EGaIn colloidal motor clusters move collectively and redisperse when the applied acoustic frequency is changed. Numerical simulations reveal that the flower-like clusters are created by the acoustic propulsion in combination with steric repulsion and hydrodynamics.
Texto completo:
1
Banco de datos:
MEDLINE
Idioma:
En
Año:
2020
Tipo del documento:
Article