Microstructure evolution in aqueous solutions of cetyl trimethylammonium bromide (CTAB) and phenol derivatives

Agarwal, Vivek; Singh, Mohit; McPherson, Gary L.; John, Vijay T.; Bose, Arijit

doi:10.1016/j.colsurfa.2006.02.047

Cited by 60 publications

(55 citation statements)

References 42 publications

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“…Sample preparation, transfer and imaging are done following the same procedure described before for mixtures of micelles with phenolic organic dopants. 56 All sample preparation was done in a controlled environment chamber, where the temperature and solvent partial pressure are controlled carefully to maintain the sample temperature and suppress any evaporation. A drop containing a few microlitres of the fluid sample, equilibrated within the chamber, is withdrawn using a pipette and deposited onto a specially prepared holey carbon grid.…”

Section: Static Light Scattering (Sls)mentioning

confidence: 99%

Mesophase separation and probe dynamics in protein–polyelectrolyte coacervates

et al. 2007

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Protein-polyelectrolyte coacervates are self-assembling macroscopically monophasic biomacromolecular fluids whose unique properties arise from transient heterogeneities. The structures of coacervates formed at different conditions of pH and ionic strength from poly(dimethyldiallylammonium chloride) and bovine serum albumin (BSA), were probed using fluorescence recovery after photobleaching. Measurements of self-diffusion in coacervates were carried out using fluorescein-tagged BSA, and similarly tagged Ficoll, a non-interacting branched polysaccharide with the same size as BSA. The results are best explained by temporal and spatial heterogeneities, also inferred from static light scattering and cryo-TEM, which indicate heterogeneous scattering centers of several hundred nm. Taken together with previous dynamic light scattering and rheology studies, the results are consistent with the presence of extensive dilute domains in which are embedded partially interconnected 50-700 nm dense domains. At short length scales, protein mobility is unobstructed by these clusters. At intermediate length scales, proteins are slowed down due to tortuosity effects within the blind alleys of the dense domains, and to adsorption at dense/dilute domain interfaces. Finally, at long length scales, obstructed diffusion is alleviated by the break-up of dense domains. These findings are discussed in terms of previously suggested models for protein-polyelectrolyte coacervates. Possible explanations for the origin of mesophase separation are offered.

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Section: Static Light Scattering (Sls)mentioning

confidence: 99%

Mesophase separation and probe dynamics in protein–polyelectrolyte coacervates

et al. 2007

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“…Prof. Raghavan's group has also studied WLM to vesicle transition as influenced by heat. Prof. A. Bose [28] of University of Rhode Island and Prof. V.T. John [28] of Tulane University, USA has investigated surfactant solubilization and direct encapsulation of interfacially active phenols in mesoporous silicas.…”

Section: Historical Overviewmentioning

confidence: 99%

“…Prof. A. Bose [28] of University of Rhode Island and Prof. V.T. John [28] of Tulane University, USA has investigated surfactant solubilization and direct encapsulation of interfacially active phenols in mesoporous silicas. Template synthesis of mesoscopic tube silicates using aqueous mixtures of naphthalene diol and ammonium surfactant has been carried out by Prof. M. Isayama [29] of Kyushu University, Japan.…”

Section: Historical Overviewmentioning

confidence: 99%

Weak interactions-Strong effects: Key role of hydrophobic interaction in the formation of stimuli-responsive viscoelastic gel of worm-like micelles

Saha

2014

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Among all the weak interactions, which are operative in the domain of chemistry, hydrophobic effect is one that leads to new structural motifs like molecular self-assemblies viz., micelles, vesicles etc. Worm-like micelles are polymer like aggregates which have been formed in aqueous surfactant solutions in the presence of additives. These are relatively new materials with exciting material properties. These stimuli-responsive viscoelastic materials are interesting from both fundamental understanding as well as application points of view. The physico-chemical properties of worm-like micelles are studied and the morphological transitions to vesicle as functions of various parameters have been investigated.

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“…Changes in microstructure of surfactant aggregates that are induced by the addition of a series of phenolic organic dopants (phenol, cresol and alkyl-substituted phenols, namely 4-ethyl phenol, 4-n and i-butyl phenol) to a micellar solution of CTAB have been studied using cryogenic transmission electron microscopy (cryo-TEM) [61][62][63]. As the concentration of each of the dopants is increased, there is a systematic reduction in the curvature of the observed microstructure.…”

Section: Microstructural Transition Of Micelles In the Presence Of Nementioning

confidence: 99%

Hydrogen‐Bonded Large Molecular Aggregates of Charged Amphiphiles and Unusual Rheology: Photochemistry and Photophysics of Hydroxyaromatic Dopants

Ali

Saha

2010

Hydrogen Bonding and Transfer in the Excited State

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Microstructure evolution in aqueous solutions of cetyl trimethylammonium bromide (CTAB) and phenol derivatives

Cited by 60 publications

References 42 publications

Mesophase separation and probe dynamics in protein–polyelectrolyte coacervates

Mesophase separation and probe dynamics in protein–polyelectrolyte coacervates

Weak interactions-Strong effects: Key role of hydrophobic interaction in the formation of stimuli-responsive viscoelastic gel of worm-like micelles

Hydrogen‐Bonded Large Molecular Aggregates of Charged Amphiphiles and Unusual Rheology: Photochemistry and Photophysics of Hydroxyaromatic Dopants

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