Pressure-induced structural changes of liquid As, Sb, and IV–VI compounds

which can monitor the rheological properties of liquids between two surfaces as a function of surface separation distance (D) from μm to contact with nm resolution. In this study, we investigated the rheological properties of a liquid crystal, 4-cyano-4’-hexylbiphenyl (6CB), under the electric field which induces the orientational change of 6CB. Resonance curves were obtained by measuring the amplitude of shear as a function of angular frequency. Polarizing microscopy confirmed that 6CB was in the planar orientation between mica surfaces without electric field, and in the homeotropic orientation under the electric field (28 V, 1 kHz). The viscosity of 6CB was larger for the case of 0 V than the case of 28 V at 370-14 nm, which agreed with Miesowicz viscosity. Below D=14 nm, the viscosity increased similarly both at 0 V and 28 V, indicating the same orientation of 6CB under confinement. 1) M. Mizukami, K. Kusakabe, and K. Kurihara, Prog. Colloid Polym. Sci., 128, 105, (2004)