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Journal Article

High-resolution x-ray measurements of the nematic-smectic-A transition in the polymeric liquid crystal P4.1 polysiloxane

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Zimmermann,  Herbert
Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society;
Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;
Zimmermann Group, Max Planck Institute for Medical Research, Max Planck Society;
Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society;

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https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.61.1206
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https://doi.org/10.1103/PhysRevLett.61.1206
(Any fulltext)

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Citation

Keller, E. N., Halfon, R., Nachaliel, E., Davidov, D., & Zimmermann, H. (1988). High-resolution x-ray measurements of the nematic-smectic-A transition in the polymeric liquid crystal P4.1 polysiloxane. Physical Review Letters, 61(10), 1206-1209. doi:10.1103/PhysRevLett.61.1206.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-AE3D-9
Abstract
We report on the first high-resolution x-ray measurements of a second-order nematic to (bilayer) smectic-A phase transition in a polymeric liquid crystal, P4.1 polysiloxane. The critical exponents of the parallel and perpendicular correlation lengths and susceptibility were ν∥=0.77±0.05, ν⊥=0.57±0.08, and γ=1.33±0.10, respectively. The bare correlation lengths, ξ0∥q0 and ξ0⊥q0, were 3.27 ± 0.08 and 1.09 ± 0.14, respectively, and are unusually large in comparison to monomeric liquid crystals.