Tunable Multifunctional Thermal Metamaterials: Manipulation of LocalHeat Flux via Assembly of Unit-Cell Thermal Shifters

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486556.do
DOI
10.1038/srep41000
Title
Tunable Multifunctional Thermal Metamaterials: Manipulation of LocalHeat Flux via Assembly of Unit-Cell Thermal Shifters
Description
The authors gratefully acknowledge the financial support provided byDefense Acquisition Program Administration and Agency for DefenseDevelopment under the contract UD150032GD. This work was also supportedby the Basic Science Research Program through the National ResearchFoundation of Korea (NRF), funded by the Ministry of Education(NRF-2015R1D1A1A01059274).
abstract
Thermal metamaterials, designed by transformation thermodynamics are artificial structures that can actively control heat flux at a continuum scale. However, fabrication of them is very challenging because it requires a continuous change of thermal properties in materials, for one specific function. Herein, we introduce tunable thermal metamaterials that use the assembly of unit-cell thermal shifters for a remarkable enhancement in multifunctionality as well as manufacturability. Similar to the digitization of a two-dimensional image, designed thermal metamaterials by transformation thermodynamics are disassembled as unit-cells thermal shifters in tiny areas, representing discretized heat flux lines in local spots. The programmed-reassembly of thermal shifters inspired by LEGO enable the four significant functions of thermal metamaterials-shield, concentrator, diffuser, and rotator-in both simulation and experimental verification using finite element method and fabricated structures made from copper and PDMS. This work paves the way for overcoming the structural and functional limitations of thermal metamaterials.
provenance
Made available in Cube on 2018-09-28T16:10:48Z (GMT). No. of bitstreams: 0
language
English
author
Park, Gwanwoo
Kang, Sunggu
Lee, Howon
Choi, Wonjoon
orcid
Lee, Howon/0000-0001-5778-2398
accessioned
2018-09-28T16:10:48Z
available
2018-09-28T16:10:48Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486556.do
Funder
교육부
Funding Program
개인기초연구(교육부)
Project ID
1345271131
Jurisdiction
Rep.of Korea
Project Name
Multifunctional Materials-Surfaces Reformation via Self-Propagating Combustion Waves for Energy System Applications
rights
openAccess
type
article


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