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Ultrahigh Elastic Strain Energy Storage in Metal-Oxide-Infiltrated Patterned Hybrid Polymer Nanocomposites

Authors :
Keith J. Dusoe
Aaron Stein
Chang-Yong Nam
Xinyi Ye
Kim Kisslinger
Seok Woo Lee
Source :
Nano letters. 17(12)
Publication Year :
2017

Abstract

Modulus of resilience, the measure of a material’s ability to store and release elastic strain energy, is critical for realizing advanced mechanical actuation technologies in micro/nanoelectromechanical systems. In general, engineering the modulus of resilience is difficult because it requires asymmetrically increasing yield strength and Young’s modulus against their mutual scaling behavior. This task becomes further challenging if it needs to be carried out at the nanometer scale. Here, we demonstrate organic–inorganic hybrid composite nanopillars with one of the highest modulus of resilience per density by utilizing vapor-phase aluminum oxide infiltration in lithographically patterned negative photoresist SU-8. In situ nanomechanical measurements reveal a metal-like high yield strength (∼500 MPa) with an unusually low, foam-like Young’s modulus (∼7 GPa), a unique pairing that yields ultrahigh modulus of resilience, reaching up to ∼24 MJ/m3 as well as exceptional modulus of resilience per density of ∼13....

Details

ISSN :
15306992
Volume :
17
Issue :
12
Database :
OpenAIRE
Journal :
Nano letters
Accession number :
edsair.doi.dedup.....8707fe3af1cb3fd9baefdbb3fec88476