Journal of Chemical Physics, Vol.115, No.2, 994-997, 2001
The translational and rotational drag on Langmuir monolayer domains
The ratio of the rotational and translational drag coefficient of a circular liquid condensed Langmuir monolayer domain moved in different phases is measured. A single domain is fixed at its boundary and forced to undergo combined translational and rotational motion. It is observed, that the drag force is dominated by the viscous dissipation of the three dimensional subphase and affected by the elasticity of the surrounding monolayer phase.