A recently reported method for the determination of contact angles of small monodisperse spherical particles with liquid/vapour interfaces has been extended for the measurement of line tensions of the solid/liquid/air contact line. The method involves compressing monolayers of particles on a liquid substrate in a Langmuir trough to obtain surface pressures at the point of monolayer collapse.
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Aveyard et al. (1995) studied this question.
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