dc.contributor.author | Sanchez-Valle, Carmen | |
dc.contributor.author | Lethbridge, Zoe A. D. | |
dc.contributor.author | Sinogeikin, Stanislav V. | |
dc.contributor.author | Williams, Jennifer J. | |
dc.contributor.author | Walton, Richard I. | |
dc.contributor.author | Evans, Kenneth E. | |
dc.contributor.author | Bass, Jay D. | |
dc.date.accessioned | 2013-05-21T13:02:34Z | |
dc.date.issued | 2008-05-09 | |
dc.description.abstract | Brillouin 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.citation | Vol. 128 (18), article 184503 | en_GB |
dc.identifier.doi | 10.1063/1.2912061 | |
dc.identifier.uri | http://hdl.handle.net/10871/9559 | |
dc.language.iso | en | en_GB |
dc.publisher | American Institute of Physics | en_GB |
dc.subject | aggregates (materials) | en_GB |
dc.subject | Brillouin spectra | en_GB |
dc.subject | compressibility | en_GB |
dc.subject | elasticity | en_GB |
dc.subject | melt processing | en_GB |
dc.subject | Poisson ratio | en_GB |
dc.subject | silicon compounds | en_GB |
dc.subject | zeolites | en_GB |
dc.title | Negative Poisson's ratios in siliceous zeolite MFI-silicalite | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2013-05-21T13:02:34Z | |
dc.identifier.issn | 0021-9606 | |
exeter.place-of-publication | United States | |
dc.description | Copyright © 2008 American Institute of Physics | en_GB |
dc.identifier.eissn | 1089-7690 | |
dc.identifier.journal | Journal of Chemical Physics | en_GB |