Formation of complex films with water-soluble CTAB molecules

TL;DR

This paper demonstrates the formation of complex Langmuir monolayers with water-soluble CTAB molecules interacting with stearic acid, and successfully creates multilayered LB films doped with congo red, confirmed by spectroscopic analysis.

Contribution

It reports the formation and characterization of water-soluble CTAB-based complex films and their multilayered LB films doped with congo red, a novel approach in film fabrication.

Findings

Successful formation of CTAB-SA complex monolayers.

Multilayered LB films doped with congo red were fabricated.

Spectroscopic analysis confirmed dye incorporation.

Abstract

This communication reports the formation of complex Langmuir monolayer at the air-water interface with the water-soluble -trimethyl ammonium bromide (CTAB) molecules when interacted with the stearic acid (SA) molecules. The reaction kinetics of the formation of the CTAB-SA complex was monitored by observing the surface pressure versus time graph. Multilayered LB films of this complex doped with congo red was successfully formed onto a quartz substrate. UV-Vis absorption and steady state fluorescence spectroscopic characteristics of this doped LB films confirms the successful incorporation of congo red molecules in to the CTAB-SA complex films.