Nematic Configuration in Submicron Cylindrical Cavities: 2H NMR Study
We present the first experimental study of nematic molecular configuration in cylindrical cavities of submicron size. 2H NMR spectra unambiguously show that the liquid crystal molecules are attached perpendicular to the polycarbonate cylinder walls but change their orientation towards the centre of the cylinder to align parallel to the cylinder axis there. This “escape effect” has been predicted years ago by Cladis and Kleman [J. Physique 33, 591 (1972)]. The 2H NMR spectra of confined liquid crystal allow us to obtain the value of the translational diffusion constant and the density of domain walls between oppositely oriented domains.