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dc.contributor.authorSanchez-Valle, Carmen
dc.contributor.authorLethbridge, Zoe A. D.
dc.contributor.authorSinogeikin, Stanislav V.
dc.contributor.authorWilliams, Jennifer J.
dc.contributor.authorWalton, Richard I.
dc.contributor.authorEvans, Kenneth E.
dc.contributor.authorBass, Jay D.
dc.date.accessioned2013-05-21T13:02:34Z
dc.date.issued2008
dc.description.abstractBrillouin scattering measurements of the single-crystal elastic properties of the as-made zeolite silicalite mid R:(C(3)H(7))(4)NFmid R:(4)[Si(96)O(192)]-MFI provides the first experimental evidence for on-axis negative Poisson's ratios (auxeticity) in a synthetic zeolite structure. MFI laterally contracts when compressed and laterally expands when stretched along x(1) and x(2) directions in the (001) plane (nu(12)=-0.061, nu(21)=-0.051). The aggregate Poisson's ratio of MFI, although positive, has an anomalously low value nu=0.175(3) compared to other silicate materials. These results suggest that the template-free MFI-silicalite [Si(96)O(192)] might have potential applications as tunable sieve where molecular discriminating characteristics are adjusted by application of stress along specific axes.en_GB
dc.identifier.citationVol. 128 (18), article 184503en_GB
dc.identifier.doi10.1063/1.2912061
dc.identifier.urihttp://hdl.handle.net/10871/9559
dc.language.isoenen_GB
dc.publisherAmerican Institute of Physicsen_GB
dc.relation.urlhttp://dx.doi.org/10.1063/1.2912061en_GB
dc.subjectaggregates (materials)en_GB
dc.subjectBrillouin spectraen_GB
dc.subjectcompressibilityen_GB
dc.subjectelasticityen_GB
dc.subjectmelt processingen_GB
dc.subjectPoisson ratioen_GB
dc.subjectsilicon compoundsen_GB
dc.subjectzeolitesen_GB
dc.titleNegative Poisson's ratios in siliceous zeolite MFI-silicaliteen_GB
dc.typeArticleen_GB
dc.date.available2013-05-21T13:02:34Z
dc.identifier.issn0021-9606
exeter.place-of-publicationUnited States
dc.descriptionCopyright © 2008 American Institute of Physicsen_GB
dc.identifier.eissn1089-7690
dc.identifier.journalJournal of Chemical Physicsen_GB


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