“…98 The smectic films can be excited mechanically or electrically to study their geometrical deformations, viscosity effects, and theoretical problems of membrane dynamics. [99][100][101][102][103][104][105][106][107][108][109][110] Electrically driven convective flow in the film plane has been visualized by advection of islands or tracer particles, [111][112][113] and analysed within theoretical models (e.g. ref.…”