Determination of critical micelle concentration by hyper-Rayleigh scattering

Journal of the American Chemical Society

Volumn 125, Issue 6, 2003, Pages 1602-1606

  Ghosh, Suhrit ^a   Krishnan, Anu ^a   Das, Puspendu K ^a   Ramakrishnan, S ^a  

^a INDIAN INSTITUTE OF SCIENCE   (India)

Author keywords

[No Author keywords available]

Indexed keywords

CHROMOPHORES; FATTY ACIDS; HYDROCARBONS; HYDROPHILICITY; RAYLEIGH SCATTERING; SURFACE ACTIVE AGENTS;

PRE-MICELLAR AGGREGATES;

CRITICAL MICELLE CONCENTRATION;

HYDROCARBON; SURFACTANT;

ANALYTIC METHOD; ARTICLE; CHROMATOPHORE; CONCENTRATION (PARAMETERS); HYPER RAYLEIGH SCATTERING; MICELLE; RADIATION SCATTERING; SIGNAL PROCESSING; TECHNIQUE;

EID: 0037433261     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja029070r     Document Type: Article

References (20)

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14. The synthesis and polymerization studies of this chromophore will be published elsewhere. Geeta Kheter Paul and S. Ramakrishnan. To be published.
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18. The variation in the UV-vis spectra of the surfactant B as a function of concentration, spanning the range above and below CMC, followed the expected Beer-Lambert's law confirming the absence of any specific ground-state interactions between the chromophores above CMC.
19. As pointed out by one of the reviewers, the PNP could be partitioned into the hydrophobic interior of the CTAB micelles, once formed, and this could result in a change in the HRS signal. We exclude this factor, as its contribution, if any, appears to be minimal as seen from the almost invariant HRS intensity as one traverses through the CMC of CTAB.
20. It is not essential that the effective β value (per molecule) of the smaller aggregates be higher than that of the free species. But for this kind of behavior to be seen, this value should certainly be higher than that of the β-value (per molecule) of the micellar aggregates.