Shaping micro-clusters via inverse jamming and topographic close-packing of microbombs
- Authors
- Yu, Seunggun; Cho, Hyesung; Hong, Jun Pyo; Park, Hyunchul; Jolly, Jason Christopher; Kang, Hong Suk; Lee, Jin Hong; Kim, Junsoo; Lee, Seung Hwan; Lee, Albert S.; Hong, Soon Man; Park, Cheolmin; Yang, Shu; Koo, Chong Min
- Issue Date
- 28-9월-2017
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.8
- Indexed
- SCIE
SCOPUS
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 8
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/82184
- DOI
- 10.1038/s41467-017-00538-z
- ISSN
- 2041-1723
- Abstract
- Designing topographic clusters is of significant interest, yet it remains challenging as they often lack mobility or deformability. Here we exploit the huge volumetric expansion (up to 3000%) of a new type of building block, thermally expandable microbombs. They consist of a viscoelastic polymeric shell and a volatile gas core, which, within structural confinement, create micro-clusters via inverse jamming and topographical close-packing. Upon heating, microbombs anchored in rigid confinement underwent balloon-like blowing up, allowing for dense clusters via soft interplay between viscoelastic shells. Importantly, the confinement is unyielding against the internal pressure of the microbombs, thereby enabling self-assembled clusters, which can be coupled with topographic inscription to introduce structural hierarchy on the clusters. Our strategy provides densely packed yet ultralight clusters with a variety of complex shapes, cleavages, curvatures, and hierarchy. In turn, these clusters will enrich our ability to explore the assemblies of the ever-increasing range of microparticle systems.
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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
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