Measurement of line tension from cell coalescence events in a Langmuir film

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Epifluorescence microscopy was used to examine Langmuir films of an alkoxy-substituted (phenylene acetylene-pyridine acetylene) polymer. The polymer was observed to form microscopic two-dimensional emulsion-like cellular network morphologies after treatment by a simple processing procedure. Cell coalescence was found to be an important process in the evolution of the cellular network. As observed under the microscope, cell coalescence is similar to the bursting of a soap bubble. An estimate of the line tension was made using an analogue of an equation developed by Culick and others to describe the rim velocity of a bursting soap bubble.

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Journal of Physical Chemistry B

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