Matter diffusion in hexagonal columnar phases

Abstract

Matter di usion experiments are carried out in hexagonal columnar phases of mesogenic disk-like and polycatenar compounds. The di usion characteristics of two d y es of di erent sizes di used into these mesophases are determined by measuring the di usion coe cients along the columns and perpendicularly to them. The nature of di usion versus the structure of these mesophases is discussed in comparison with previous results obtained in nematic and smectic systems.PACS numbers: 61.30.v; 62.20.Fe; 66.30.J.