Designing graphene origami structures with a giant isotropic negative coefficient of thermal expansion

Duc Tam Ho, Udo Schwingenschlögl*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Materials with an isotropic negative coefficient of thermal expansion (CTE) of the order of K−1 are rare, and almost all of them are porous. Using molecular dynamics simulations, we show that graphene origami structures obtained by pattern-based hydrogenation can exhibit a negative CTE. The magnitude and anisotropy of the CTE can be controlled by parameters of the pattern-based hydrogenation that determine the stiffness and Poisson ratio, respectively. We achieve an isotropic CTE of K−1, which is an enhancement by three orders of magnitude as compared to reports for other graphene-based structures and comes close to the record of all known materials.
Original languageEnglish
Article number101357
Number of pages4
JournalExtreme Mechanics Letters
Volume47
Early online date2 Jun 2021
DOIs
Publication statusPublished - 1 Aug 2021
Externally publishedYes

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