Three-dimensionally bonded spongy graphene material with super compressive elasticity and near-zero Poisson's ratio

Title
Three-dimensionally bonded spongy graphene material with super compressive elasticity and near-zero Poisson's ratio
Author
김선정
Issue Date
2015-01
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v. 6, Jan 2015, Page. 1-9
Abstract
It is a challenge to fabricate graphene bulk materials with properties arising from the nature of individual graphene sheets, and which assemble into monolithic three-dimensional structures. Here we report the scalable self-assembly of randomly oriented graphene sheets into additive-free, essentially homogenous graphene sponge materials that provide a combination of both cork-like and rubber-like properties. These graphene sponges, with densities similar to air, display Poisson's ratios in all directions that are near-zero and largely strain-independent during reversible compression to giant strains. And at the same time, they function as enthalpic rubbers, which can recover up to 98% compression in air and 90% in liquids, and operate between -196 and 900 degrees C. Furthermore, these sponges provide reversible liquid absorption for hundreds of cycles and then discharge it within seconds, while still providing an effective near-zero Poisson's ratio.
URI
http://hdl.handle.net/20.500.11754/21226http://www.nature.com/articles/ncomms7141
ISSN
2041-1723
DOI
10.1038/ncomms7141
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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