Journal article
Characterization of the structural transitions in CTAB micelles using fluorescein isothiocyanate
NS Mohd Yusof, MN Khan, M Ashokkumar
Journal of Physical Chemistry C | Published : 2012
DOI: 10.1021/jp304854h
Abstract
A fluorescence-based method has been developed to detect the structural changes that occur in micelle systems. The sensitivity of fluorescein isothiocyanate (FITC) has been evaluated for (i) detecting the micellization of cetyltrimethyl ammonium bromide (CTAB) and (ii) probing the concentration dependent aggregation, leading to microstructural changes that occur within CTAB micelles. The critical micelle concentration (cmc) of CTAB has been determined to be 1.35 ± 0.35 mM using the fluorescence spectral characteristics of FITC. Because the experimental conditions have been altered to optimize FITC probing, the cmc is also validated by surface tension and conductivity measurements. To make su..
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Funding Acknowledgements
N.S.M.Y. and M.N.K. acknowledge the University of Malaya for the award of Bright Sparks-SLAB-SLAI scholarship (N.S.M.Y.) and a grant, UM.C/HIR/MOHE/SC/07. M.A. acknowledges financial support from the Australian Research Council (Discovery Project scheme).