title: Tailoring graphene to achieve negative Poisson's ratio properties.
abstract: Graphene can be made auxetic through the introduction of vacancy defects. This results in the thinnest negative Poisson's ratio material at ambient conditions known so far, an effect achieved via a nanoscale de-wrinkling mechanism that mimics the behavior at the macroscale exhibited by a crumpled sheet of paper when stretched.
authors.affiliation: Metamaterials Unit, Faculty of Science, University of Malta, Msida, MSD 2080, Malta; Department of Chemistry, Faculty of Science, University of Malta, Msida, MSD 2080, Malta.
authors.forename: Joseph N
authors.initials: JN
authors.lastname: Grima
authors.forename: Szymon
authors.initials: S
authors.lastname: Winczewski
authors.forename: Luke
authors.initials: L
authors.lastname: Mizzi
authors.forename: Michael C
authors.initials: MC
authors.lastname: Grech
authors.forename: Reuben
authors.initials: R
authors.lastname: Cauchi
authors.forename: Ruben
authors.initials: R
authors.lastname: Gatt
authors.forename: Daphne
authors.initials: D
authors.lastname: Attard
authors.forename: Krzysztof W
authors.initials: KW
authors.lastname: Wojciechowski
authors.forename: Jarosław
authors.initials: J
authors.lastname: Rybicki
keywords: Poisson's ratio; auxetic; graphene; molecular dynamics; vacancy defects