Elementary edge dislocations in a lyotropic smectic liquid crystal have been observed with use of a new technique. Their annealing dynamics are related to the permeation coefficient λₚ, which appears in the viscoelastic equations for a smectic, yielding λₚ=1×10^-30 cm² / poise in hydrated dimyristoyl phosphatidylcholine. The associated self-diffusion coefficient anisotropy D_⊥D_∥=2×10¹² is many orders of magnitude larger than that found in earlier attempts where the effect of structural defects may have prevailed.
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Chan et al. (1981) studied this question.
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