Multiscale deformations lead to high toughness and circularly polarized emission in helical nacre-like fibres
- Title
- Multiscale deformations lead to high toughness and circularly polarized emission in helical nacre-like fibres
- Author
- 염봉준
- Keywords
- BUNDLED ACTIN NETWORKS; CARBON-NANOTUBE FIBERS; BIOINSPIRED DESIGN; MACROSCOPIC FIBERS; ARTIFICIAL NACRE; COMPOSITE FIBERS; GRAPHENE OXIDE; STRAIN SENSORS; QUANTUM DOTS; LUMINESCENCE
- Issue Date
- 2016-02
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.7
- Abstract
- Nacre-like composites have been investigated typically in the form of coatings or freestanding sheets. They demonstrated remarkable mechanical properties and are used as ultrastrong materials but macroscale fibres with nacre-like organization can improve mechanical properties even further. The fiber form or nacre can, simplify manufacturing and offer new functional properties unknown yet for other forms of biomimetic materials. Here we demonstrate that nacre-like fibres can be produced by shear-induced self-assembly of nanoplatelets. The synergy between two structural motifs-nanoscale brick-and-mortar stacking of platelets and microscale twisting of the fibres-gives rise to high stretchability (>400%) and gravimetric toughness (640 J g(-1)). These unique mechanical properties originate from the multiscale deformation regime involving solid-state self-organization processes that lead to efficient energy dissipation. Incorporating luminescent CdTe nanowires into these fibres imparts the new property of mechanically tunable circularly polarized luminescence. The nacre-like fibres open a novel technological space for optomechanics of biomimetic composites, while their continuous spinning methodology makes scalable production realistic.
- URI
- https://www.nature.com/articles/ncomms10701http://hdl.handle.net/20.500.11754/42952
- ISSN
- 2041-1723
- DOI
- 10.1038/ncomms10701
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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