TY - JOUR A1 - Schönhals, Andreas A1 - Frunza, S. A1 - Frunza, L. A1 - Goering, Harald A1 - Sturm, Heinz T1 - On the dynamics of surface layer in octylcyanobiphenyl-aerosil systems JF - Europhysics letters N2 - A broadband dielectric study of the dispersions of silica spheres (Aerosil 380) in octylcyanobiphenyl (8CB) with densities between 0.083 and 10 g of silica per 1 cm3 of liquid crystal (LC) is reported. High values of silica densities were achieved for the first time to observe the behaviour of the LC monolayer on the surface of the silica particles. The relaxation characteristic of the bulk LC is noticed especially for the samples with low silica densities. Additionally, a slow relaxation was detected, even at temperatures for which the bulk LC is in the crystalline state. It was assigned to the surface layer of LC molecules. Remarkably, the temperature dependence of the relaxation rates for this slow process shows a behaviour typical for glass-forming liquids. PY - 2001 DO - https://doi.org/10.1209/epl/i2001-00591-8 SN - 0302-072X SN - 0295-5075 SN - 1286-4854 VL - 56 IS - 6 SP - 801 EP - 807 PB - EDP Science CY - Les-Ulis Cedexa, France AN - OPUS4-1572 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -