TY - JOUR
T1 - Negative Poisson's ratios in siliceous zeolite MFI-silicalite
AU - Sanchez-Valle, Carmen
AU - Lethbridge, Zoe A.D.
AU - Sinogeikin, Stanislav V.
AU - Williams, Jennifer J.
AU - Walton, Richard I.
AU - Evans, Kenneth E.
AU - Bass, Jay D.
N1 - Funding Information:
This work was supported by the USA National Science Foundation (Nos. EAR 0003383 and EAR0135642 to J.D.B.) and the Engineering and Physical Sciences Research Council, UK (No. EP/C516591/2). We thank C. W. Smith (University of Exeter) for useful discussions.
PY - 2008
Y1 - 2008
N2 - Brillouin scattering measurements of the single-crystal elastic properties of the as-made zeolite silicalite ∫ (C3 H7)4 NF∫4 [Si96 O192] -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 x1 and x2 directions in the (001) plane (12 =-0.061, 21 =-0.051). The aggregate Poisson's ratio of MFI, although positive, has an anomalously low value =0.175 (3) compared to other silicate materials. These results suggest that the template-free MFI-silicalite [Si96 O192] might have potential applications as tunable sieve where molecular discriminating characteristics are adjusted by application of stress along specific axes.
AB - Brillouin scattering measurements of the single-crystal elastic properties of the as-made zeolite silicalite ∫ (C3 H7)4 NF∫4 [Si96 O192] -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 x1 and x2 directions in the (001) plane (12 =-0.061, 21 =-0.051). The aggregate Poisson's ratio of MFI, although positive, has an anomalously low value =0.175 (3) compared to other silicate materials. These results suggest that the template-free MFI-silicalite [Si96 O192] might have potential applications as tunable sieve where molecular discriminating characteristics are adjusted by application of stress along specific axes.
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U2 - 10.1063/1.2912061
DO - 10.1063/1.2912061
M3 - Article
C2 - 18532822
AN - SCOPUS:43949132341
SN - 0021-9606
VL - 128
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 18
M1 - 184503
ER -