Super-elasticity of three-dimensionally cross-linked graphene materials all the way to deep cryogenic temperatures

Journal: Science Advances

Published: 2019-04-01

DOI: 10.1126/sciadv.aav2589

Affiliations: 5

Authors: 10

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Research Highlight

Ultracool elasticity

© LAGUNA DESIGN/Getty

© LAGUNA DESIGN/Getty

A superelastic material that retains its elasticity down to just 4 degrees above absolute zero has been developed by a US−China team that included researchers at Nankai University.

Typical elastic materials made from flexible polymers lose their elasticity at about −55 degrees Celsius. But many applications require materials that remain elastic at much lower temperatures.

Carbon nanomaterials, such as single-atom-thick sheets of carbon called graphene, show exceptional flexibility at the nanoscale. However, these properties are usually lost when multiple graphene sheets are combined into a macroscale material.

The team has developed a new bulk form of graphene in which graphene sheets are bonded together with a network of covalent bonds, primarily at the edges of each sheet. This unique pattern of bonding enables this foam-like material to retain graphene’s superelasticity down to 4 kelvin, making it the first material to retain high elasticity at deep-cryogenic temperatures.

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  1. Science Advances 5, eaav2589 (2019). doi: 10.1126/sciadv.aav2589
Institutions Share
Department of Materials Science and NanoEngineering (MSNE), Rice University, United States of America (USA) 0.20
Center for Nanoscale Science and Technology, NKU, China 0.20
MOE Key Laboratory of Functional Polymer Materials, NKU, China 0.20
State Key Laboratory of Elemento-Organic Chemistry, NKU, China 0.20
School of Materials Science and Engineering / National Institute for Advanced Materials, NKU, China 0.20

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