Investigations of RhB18 Langmuir monolayer by Fluorescence Imaging Microscopy

TL;DR

This study investigates the phase separation and domain formation in RhB and Stearic acid Langmuir monolayers using surface pressure measurements and fluorescence imaging microscopy, revealing microcrystalline domains due to repulsive interactions.

Contribution

It provides direct visualization and analysis of domain structures in mixed Langmuir monolayers, highlighting the phase separation caused by component interactions.

Findings

Phase separation occurs in RhB and SA monolayers.

Microcrystalline domains are visualized via fluorescence microscopy.

Repulsive interactions drive domain formation.

Abstract

This communication reports the surface pressure vs. area per molecule isotherm and Fluorescence Imaging Microscopic studies of the formation of domain structure in the mixed Langmuir monolayer of RhB and Stearic acid (SA) at the air water interface. Strong repulsive interaction between the unlike components leads to the phase separation and formation of microcrystalline domains at the air water interface of the Langmuir monolayer. These domain can be directly visualized using fluorescence imaging microscope.