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Self‐Assembled Ultra High Strength, Ultra Stiff Mechanical Metamaterials Based on Inverse Opals
Author(s) -
do Rosário Jefferson J.,
Lilleodden Erica T.,
Waleczek Martin,
Kubrin Roman,
Petrov Alexander Yu.,
Dyachenko Pavel N.,
Sabisch Julian E.C.,
Nielsch Kornelius,
Huber Norbert,
Eich Manfred,
Schneider Gerold A.
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500118
Subject(s) - materials science , inverse , composite material , metamaterial , ceramic , modulus , stress (linguistics) , compression (physics) , mechanical strength , elastic modulus , composite number , optoelectronics , linguistics , philosophy , geometry , mathematics
Inverse opals are presented as a class of mechanical metamaterials. Pure silica and titania coated silica inverse opals show high strength‐ and modulus‐to‐weight ratios, even outperforming many optimized strut‐based microfabricated ceramic materials. Micropillars were fabricated out of self‐assembled layers and tested under compression. Their high performance is due to its arch‐like structure, where stresses are smoothly directed into the regions of higher material mass, thereby mitigating the stress concentration at the pore perimeter, as confirmed by numerical simulations.