Resumen:
great variety of biologically relevant monolayers present phase coexistence characterized bydomains formed by lipids in an ordered phase state dispersed in a continuous, disordered phase.The difference in surface densities between these phases originates inter?domain dipolar interactions,which are relevant for the determination of the spacial distribution of domains, as wellas their dynamics. In this work, we propose a novel manner of estimating the dipolar repulsionusing a passive method that involves the analysis of images of the monolayer with phase coexistence.The method is based on the comparison of the pair correlation function obtained fromexperiments with that obtained from Brownian dynamics simulations of a model system. As anexample, we determined the difference in dipolar density of a binary monolayer of DSPC/DMPCat the air?water interface from the analysis of the radial distribution of domains, and the resultsare