Determination of critical micelle concentration by hyper-Rayleigh scattering

Ghosh, Suhrit and Krishnan, Anu and Das, Puspendu K and Ramakrishnan, S (2003) Determination of critical micelle concentration by hyper-Rayleigh scattering. In: Journal of the American Chemical Society, 125 (6). 1602-1606 .

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Abstract

The critical micelle concentration (CMC) of several surfactants that contain an NLO chromophore, either at the hydrocarbon tail, or at the hydrophilic headgroup, or even as a counterion, was determined by hyper-Rayleigh scattering (HRS). In all cases, the HRS signal exhibited a similar variation with surfactant concentration, wherein the CMC is inferred from a rather unprecedented drop in the signal intensity. This drop is attributed to the formation of small pre-micellar aggregates, whose concentrations become negligible above CMC. In addition, a probe molecule, which upon protonation yielded a species with significantly enhanced HRS intensity, was developed and its utility for the determination of the CIVIC of simple fatty acids was demonstrated.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	08 Aug 2011 07:08
Last Modified:	08 Aug 2011 07:08
URI:	http://eprints.iisc.ernet.in/id/eprint/39777

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