We report on optical and structural X-ray studies on a smectic C twist grain boundary phase (TGB<Subscript>C</Subscript>) of a pure liquid crystalline material. It is shown that this TGB<Subscript>C</Subscript> phase, which exists over a large range of temperature, is definitely different from previously reported and predicted TGB<Subscript>C</Subscript> phases....</subscript></subscript></subscript>

We report the first X-ray scattering investigation of spatial variations of the q-fold quasicrystalline symmetry (so-called commensurability) of well-aligned TGB<Subscript>C</Subscript> samples. A spatial resolution of 20 × 40 μm<Superscript>2</Superscript> was achieved using the ESRF microfocus beamline. The liquid crystal samples, contained...</superscript></subscript>

The structure and phase behaviour of a colloidal dispersion of plate-like particles are described. The plates are nickel (II) hydroxide and have short-range, repulsive interactions and a low polydispersity. As the concentration of the plates is increased, an equilibrium phase separation between...

The present work is focused on density measurements near the smectic A-cholesteric liquid crystal phase transition for cholesteryl myristate (C<Subscript>14</Subscript>), cholesteryl nonanoate (C<Subscript>9</Subscript>) and binary mixtures of C<Subscript>14</Subscript> and C<Subscript>9</Subscript> and cholesteryl caproate (C<Subscript>6</Subscript>) and C<Subscript>9</Subscript>. The results have evidenced that the transition...</subscript></subscript></subscript></subscript></subscript></subscript>