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Min, Seung Kyu
Theoretical/Computational Chemistry Group for Excited State Phenomena
Research Interests
  • Excited state dynamics, photosynthesis, solarcell, light-driven molecular machine

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Metal-organic framework based on hinged cube tessellation as transformable mechanical metamaterial

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Title
Metal-organic framework based on hinged cube tessellation as transformable mechanical metamaterial
Author
Jin, EunjiLee, In SeongKim, DongwookLee, HosoowiJang, Woo-DongLah, Myoung SooMin, Seung KyuChoe, Wonyoung
Issue Date
2019-05
Publisher
American Association for the Advancement of Science
Citation
SCIENCE ADVANCES, v.5, no.5, pp.eaav4119
Abstract
Mechanical metamaterials exhibit unusual properties, such as negative Poisson’s ratio, which are difficult to achieve in conventional materials. Rational design of mechanical metamaterials at the microscale is becoming popular partly because of the advance in three-dimensional printing technologies. However, incorporating movable building blocks inside solids, thereby enabling us to manipulate mechanical movement at the molecular scale, has been a difficult task. Here, we report a metal-organic framework, self-assembled from a porphyrin linker and a new type of Zn-based secondary building unit, serving as a joint in a hinged cube tessellation. Detailed structural analysis and theoretical calculation show that this material is a mechanical metamaterial exhibiting auxetic behavior. This work demonstrates that the topology of the framework and flexible hinges inside the structure are intimately related to the mechanical properties of the material, providing a guideline for the rational design of mechanically responsive metal-organic frameworks.
URI
https://scholarworks.unist.ac.kr/handle/201301/26730
URL
https://advances.sciencemag.org/content/5/5/eaav4119
DOI
10.1126/sciadv.aav4119
ISSN
2375-2548
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CHM_Journal Papers
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