Adsorption of Cationic Polymer Micelles on Polyelectrolyte-Modified Surfaces

Talingting, Maria Ruela; Ma, Yanhui; Simmons, Chris; Webber, S. E.

doi:10.1021/la9901027

Cited by 43 publications

(57 citation statements)

References 18 publications

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“…One therefore expects that similar to small Z ions, adsorbed polyelectrolyte stars and spherical micelles would form a correlated liquid-like pattern and overcharge the surface. Recent experimental findings 10 are in line with these expectations.…”

Section: Introductionsupporting

confidence: 79%

On the charge overcompensation of quenched polyelectrolyte stars electrostatically adsorbed onto a quenched oppositely charged planar surface

Leermakers

Oever

Zhulina

2003

The Journal of Chemical Physics

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We present numerical self-consistent field calculations in a two-gradient cylindrical coordinate system for a ͑translationally restricted͒ quenched polyelectrolyte star which is electrostatically attracted to an oppositely charged surface with homogeneous surface charge density at a given ionic strength of a 1:1 electrolyte. The results prove that without any additional driving force for adsorption, electrostatic attraction alone can give significant overcompensation of the surface charge provided that the ionic strength is below some critical value. This is demonstrated for the case that the charge density on the surface is lower than the ͑projected͒ charge density in the star. In the regime of charge overcompensation, the thickness of the adsorbed layer is of the order of the star size in solution. The adsorbed layer is laterally inhomogeneous and the outer part of the adsorption profile is locally neutralized by the small counterions.

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Section: Introductionsupporting

confidence: 79%

On the charge overcompensation of quenched polyelectrolyte stars electrostatically adsorbed onto a quenched oppositely charged planar surface

Leermakers

Oever

Zhulina

2003

The Journal of Chemical Physics

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“…The grain size analysis of the image in Figure 2B revealed a mean grain diameter of 30 AE 5 nm which is in quite good agreement with the dynamic light scattering (DLS) results obtained for PSSSblock-VN micelles in aqueous solution (the diameter at the peak position of the number-weighted diameter distribution, d H ¼ 24 nm). The observed discrepancy may originate from some flattening of the micelles upon adsorption [4] and tip size convolution in the image. The AFM images may indicate that only part of the hydrophilic block is used to form the shell around the naphthalene core while the majority of the PSSS block forms a continuous phase in the film.…”

Section: Resultsmentioning

confidence: 98%

“…There is not much work on copolymers and even less on block copolymers. [2][3][4] This is mainly due to inherent difficulties in the synthesis of well-defined amphiphilic block copolymers. We show that by applying properly designed copolymers one can construct systems of extremely interesting properties.…”

Section: Introductionmentioning

confidence: 99%

Novel Photoactive Polymeric Multilayer Films Formed via Electrostatic Self‐Assembly

Zapotoczny

Golonka

Nowakowska

2005

Macromol. Rapid Commun.

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Summary: We demonstrate a novel approach for constructing photoactive multilayer films in which the aggregation of fluorescing molecules is effectively eliminated. In the films formed via a layer‐by‐layer electrostatic self‐assembly technique, the core‐shell amphiphilic copolymer, poly[(sodium 4‐styrenesulfonate)‐block‐vinylnaphthalene], was deposited. The isolated cores served as nanosized host sites for photoactive guest molecules (pyrene, perylene). The efficient energy transfer between polymeric chromophores and perylene molecules was observed.AFM image of a nanostructured polymeric film prepared via a layer‐by‐layer technique and containing photoactive block copolymer poly[(sodium 4‐styrenesulfonate)‐block‐vinylnaphthalene]. Below is the representative height profile taken along the drawn line.magnified imageAFM image of a nanostructured polymeric film prepared via a layer‐by‐layer technique and containing photoactive block copolymer poly[(sodium 4‐styrenesulfonate)‐block‐vinylnaphthalene]. Below is the representative height profile taken along the drawn line.

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“…The successful deposition of two negatively charged proteins on each other may be an analogous case 339) , profiting from the exposure of large hydrophobic sites on the film's surface. If block copolymers are used with long hydrophobic blocks, well below their glass transition temperature, the aggregates are "frozen" and deposit as colloidal particles ("nanolatexes"), and not as individiual macromolecule 309) . Molecular topology seems to have little effect on ESA if the ionic groups are accessible.…”

Section: Polymers Suited For Esamentioning

confidence: 99%

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

Bertrand

Jonas

Laschewsky³

et al. 2000

Macromol. Rapid Commun.

1,175

1,184

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A bit of historyThe key role of surfaces for many material properties as well as for many biological processes has been recognized now. Therefore, new strategies aim at the tailoring of the material's surface only -or of a thin surface layer, respectively -, while preserving the bulk properties of the underlying support. Particular emphasis has been given to the surface modification by polymers, in an attempt to extend the known versatility of polymer bulk materials to ultrathin films and coatings, and to prepare bulk-surface composite materials. The self-organization of polymers has been increasingly explored for the preparation of well-defined surfaces and interfaces in recent years, extending the use of the established methods of low molar mass compounds (for comparative reviews, see ref. 1-3)). With such techniques, polymer films are formed spontaneously on substrates, due to balanced interactions between substrate, polymer (or its precursor) and medium. Typically, very thin, often monomolecular layers are produced. Repetitive deposition steps provide a precise control over the total thickness of the coatings, in the range from a few angstroms up to the micrometer range. Moreover, the step-by-step procedures allow for a fine structuring in the third dimension. In addition to the preparation of uniform and homogeneous coatings, gratings, gradients or steps of defined height in molecular dimensions can be easily constructed.The most recent of the self-organization techniques is the alternating physisorption of oppositely charged polyelectrolytes, the so-called "layer-by-layer" method or "electrostatic self-assembly" (ESA) [3][4][5][6][7][8][9][10] . Although some early, singular studies of self-assembly by alternating adsorption of oppositely charged polyions are reported [11][12][13] , a practical method for ESA was developed Feature Article: The article presents the state-of-the-art of alternating physisorption of oppositely charged polyelectrolytes, the so-called "layer-by-layer" method or "electrostatic self-assembly" (ESA), for the preparation of thin polymer coatings. In comparison to other, more established self-organization techniques, this recent method is distinguished by its simplicity, versatility, and speed. In particular, the tendency for self-healing is unique. Emphasis is given to the role of the molecular structure of the polyelectrolytes, and to the nature of the support. Also, various parameters for the preparation of multilayer films are highlighted, which are very important due to the kinetic control of the build-up process. The structure of the resulting coatings, their quality and stability, chemical reactions in the films, and potential applications are discussed.Macromol. Rapid Commun. 21, No. 7

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Adsorption of Cationic Polymer Micelles on Polyelectrolyte-Modified Surfaces

Cited by 43 publications

References 18 publications

On the charge overcompensation of quenched polyelectrolyte stars electrostatically adsorbed onto a quenched oppositely charged planar surface

On the charge overcompensation of quenched polyelectrolyte stars electrostatically adsorbed onto a quenched oppositely charged planar surface

Novel Photoactive Polymeric Multilayer Films Formed via Electrostatic Self‐Assembly

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

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