Thermal diffusion and bending kinetics in nematic elastomer cantilever

Details Thermal diffusion and bending kinetics in nematic elastomer cantilever Thermal diffusion and bending kinetics in nematic elastomer cantilever

2007-12-10

arxiv.org/abs/0712.1439v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1140/epje/i2007-10266-4

Vertically aligned mono-domain nematic liquid crystal elastomers contract when heated. If a temperature gradient is applied across the width of such a cantilever, inhomogeneous strain distribution leads to bending motion. We modelled the kinetics of thermally-induced bending in the limit of a long thin strip and the predicted time-variation of curvature agreed quantitatively with experimental data from samples with a range of critical indices and nematic-isotropic transition temperatures. We also deduced a value for the thermal diffusion coefficient of the elastomer.

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