Acoustically manipulating internal structure of disk-in-sphere endoskeletal droplets

Gazendra Shakya, Tao Yang, Yu Gao, Apresio K. Fajrial, Baowen Li, Massimo Ruzzene, Mark A. Borden and Xiaoyun Ding ()
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Gazendra Shakya: University of Colorado
Tao Yang: University of Colorado
Yu Gao: University of Colorado
Apresio K. Fajrial: University of Colorado
Baowen Li: University of Colorado
Massimo Ruzzene: University of Colorado
Mark A. Borden: University of Colorado
Xiaoyun Ding: University of Colorado

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Manipulation of micro/nano particles has been well studied and demonstrated by optical, electromagnetic, and acoustic approaches, or their combinations. Manipulation of internal structure of droplet/particle is rarely explored and remains challenging due to its complicated nature. Here we demonstrated the manipulation of internal structure of disk-in-sphere endoskeletal droplets using acoustic wave. We developed a model to investigate the physical mechanisms behind this interesting phenomenon. Theoretical analysis of the acoustic interactions indicated that these assembly dynamics arise from a balance of the primary and secondary radiation forces. Additionally, the disk orientation was found to change with acoustic driving frequency, which allowed on-demand, reversible adjustment of the disk orientations with respect to the substrate. This dynamic behavior leads to unique reversible arrangements of the endoskeletal droplets and their internal architecture, which may provide an avenue for directed assembly of novel hierarchical colloidal architectures and intracellular organelles or intra-organoid structures.

Date: 2022
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DOI: 10.1038/s41467-022-28574-4

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