Abstract
X-ray reflectivity studies of spin-coated ultrathin films of smectic-${\mathit{C}}^{\mathrm{*}}$ liquid crystals show dramatic variation of the smectic layer spacing L as a function of the number of smectic layers n. Results for three different liquid crystals suggest a long-range force between the interfaces that decays algebraically like 1/${\mathit{n}}^{\ensuremath{\gamma}}$ where \ensuremath{\gamma}=3.0\ifmmode\pm\else\textpm\fi{}0.3. This decay is consistent with a van der Waals type of force, although its magnitude cannot be explained by the existing mechanisms. Interactions between the electric dipoles and their images as well as the formation of ferroelectric domains may provide a mechanism to explain the magnitude of the force.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
