Solubilization study for aggregates of sodium dodecyl sulfate and cationic polymer of high charge density

Lee, Jungno; Moroi, Yoshikiyo

doi:10.1016/j.jcis.2004.01.079

Cited by 22 publications

(14 citation statements)

References 23 publications

(32 reference statements)

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“…7 In order to determine the changes of the micellar properties of SDS micelles, such as cmc, aggregation number, degree of counterion binding in the presence of various concentration of CdCl 2 in SDS solution, experiments were performed using pyrene as fluorescence probe. [9][10][11] The vibronic fine structure of the pyrene fluorescence depends strongly on the polarity of the environment (Figure 6). The ratio between the intensities of the third (I 3 ) and the first (I 1 ) fluorescence peaks of pyrene is commonly used as the polarity probe.…”

Section: Ri (N)mentioning

confidence: 99%

Amplification of the index of refraction of aqueous immersion fluids by ionic surfactants

et al. 2005

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In order to find new immersion liquids to improve the resolution of 193 nm immersion photolithography, we have attempted to discover aqueous system possessing an index of refraction greater than that of water using aqueous surfactant systems. The index of refraction (RI) of both cationic and anionic surfactant systems were examined in the presence of wide range of inorganic salts, and parameters such as size of surfactants, concentrations, and temperature were varied. The refractive index (RI) was found to be increased in the presence of both anionic and cationic surfactants compared to those of water and also increased as a function of surfactant concentration. However the refractive index tends to increase much more strongly as a function of salt concentration. In our study, a maximum RI enhancement was observed from 6.5 M CdCl 2 in 8.2 mM aqueous SDS solution. The effect of micellar properties such as the critical micelle concentration (cmc) and degree of ionization were systematically studied for aqueous SDS system in the presence of CdCl 2 . The correlation on index of refraction between empirical data and theoretical prediction were performed using the concept of molar refraction. Wavelength dependence of RI from theoretical prediction based on empirical equation was examined for various concentration of CdCl 2 system and the results are reported in the paper.Subject terms: index of refraction, immersion photolithography, ionic surfactants, 193 nm, SDS, CTAC, CdCl 2 IntroductionRecently, optical lithography has been incrementally marching toward dimensions less than 45 nm. The wavelength has been reduced to 193-nm and 157-nm lithography using F 2 laser was studied tentatively for the next generation of lithography. We have been studying the mechanism of the photodegradation that leads to darkening of polymer pellicles during exposure to 157 nm radiations in order to design new soft pellicle systems that possess acceptable characteristics for 157 nm photolithography.

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Section: Ri (N)mentioning

confidence: 99%

Amplification of the index of refraction of aqueous immersion fluids by ionic surfactants

et al. 2005

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“…Table shows the most important thermodynamic parameter of aggregation called standard Gibbs free-energy of micellization (Δ G ° m ), the critical concentrations, as well as the degree of counterion binding (β) for the DTAB–water and MC–DTAB systems calculated using the mass action model for micelle formation of ionic surfactant . The following relations were used for the calculations , normalβ = 1 − S 2 S 1 normalΔ G m ACS:no-reduce ° = false( 1 + normalβ false) R T .25em ln nobreak.25em italicX normalC normalM normalC where S 2 / S 1 is the ratio of the slopes above and below the CMC, R is the universal gas constant, T is the absolute temperature and X CMC is the mole fraction of surfactant molecules at the CMC.…”

Section: Resultsmentioning

confidence: 99%

Physicochemical Properties of Methylcellulose and Dodecyltrimethylammonium Bromide in Aqueous Medium

et al. 2011

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Interactions between uncharged polymers and cationic surfactants are considered weaker than interactions with the anionic analogues. This work describes the binding occurring between methylcellulose (MC) and the cationic surfactant DTAB in aqueous medium. In the absence of salt, MC-DTAB exhibits a maximum in hydrodynamic radius, R(h,slow), with the increase in the surfactant concentration. Otherwise, in presence of salt the MC-DTAB system shows only a linear increase of R(h,slow). CAC is lower than the CMC, which is taken as an evidence of binding between the cationic surfactant and neutral polymer that induces the aggregation process. Static light scattering, rheology and micro-DSC results highlight the hydrophobic MC-DTAB association. Salt-out and the salt-in effects were observed in presence of DTAB, with a clear transition at concentration values close to the CMC, as judged from rheological and micro DSC measurements. Indeed, DTAB affects both the pattern of the sol-gel transition and the gel strength.

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“…As these dye having high light absorptivity, they can be used as optical probes in studying membranes, micelles and other host systems [7][8][9][10]. Studies on polymersurfactant interaction in aqueous solution have been attracting widespread attention due to multiple practical uses in biology [11][12][13][14] .Such studies are also assumed to be important as themixed systems/aggregates can give rise to advanced functions that are unobtainable from singlecomponent [15].Several physicochemical properties of macromolecule -surfactants are quiterelevant in this context. Formulation procedures based on suitable mixture may have beenappealing applications [16][17][18] It has been noted that oppositely charged surfactant binds to polymer surfaces through both electrostatic and hydrophobic interaction [19].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Metachromasy Induced in Azure B by Anionic Polyelctrolytes

Ratnakar¹

2014

SJC

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The interaction of two cationic dyes, namely, Azure B (AB) with an anionic polyelectrolyte, namely, sodium heparinate (NaHep) has been investigated by Spectrophotometric method. The polymer induced metachromasy in the dyes resulting in the shift of the absorption maxima of the dyes towards shorter wavelengths. The stability of the complexes formed between Azure B and sodium alginate was found to be greater than that formed between Azure B and sodium carboxymethylcellulose.This fact was further confirmed by reversal studies using alcohols, urea surfactants and electrolytes.The interaction parametersrevealed that binding between Azure B and anionic poloyelectrolytes was mainly due to electrostaticinteraction.

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Solubilization study for aggregates of sodium dodecyl sulfate and cationic polymer of high charge density

Cited by 22 publications

References 23 publications

Amplification of the index of refraction of aqueous immersion fluids by ionic surfactants

Amplification of the index of refraction of aqueous immersion fluids by ionic surfactants

Physicochemical Properties of Methylcellulose and Dodecyltrimethylammonium Bromide in Aqueous Medium

A Comparative Study of Metachromasy Induced in Azure B by Anionic Polyelctrolytes

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