High-resolution X-ray reflectivity has been employed to study the structure, wetting properties, and interfacial roughness of ultra-thin liquid crystal films. The films were prepared at the air–water interface and transferred on to glass substrates by a modified horizontal deposition technique. A 3-layer film was found to partially-wet the substrate in the nematic and isotropic phases and dewet upon cooling to the crystalline phase. The surface roughnesses at the air-film and the film-glass interfaces exhibited a gradual reversible but hysteretic conformal (strongly correlated) to non-conformal transition between the isotropic and smectic-A phases.
Suresh, K. A.; Shi, Yushan; Bhattacharyya, A.; Kumar, Satyendra (2001). Wetting–Dewetting Transition and Conformal to Non-Conformal Interfacial Roughness Transition in Ultra-Thin Liquid Crystal Films on Solid Substrates. Modern Physics Letters B 15(8) 225-233. doi: 10.1142/S0217984901001628. Retrieved from https://oaks.kent.edu/article/wetting-dewetting-transition-and-conformal-non-conformal-interfacial-roughness-transition