Layer-by-layer self assembly of polyelectrolytes on colloidal particles

Sukhorukov, Gleb B.; Donath, Edwin; Lichtenfeld, Heinz; Knippel, E.; Knippel, Monika; Budde, A.; Möhwald, Helmuth

doi:10.1016/s0927-7757(98)00213-1

Cited by 791 publications

(711 citation statements)

References 27 publications

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“…Polydispersity and size are determined by the templates and shell thickness by the number of polyelectrolyte layers. Usually, their shells are permeable only for low molecular species (<1 kDa) [887]. This makes PMCs promising candidates for drug targeting and release, and allows keeping enzymes in an active state inside the capsules where they cannot be reached by high molecular weight inhibitors from the outside [888].…”

Section: Mechanical Properties Of Microcapsulesmentioning

confidence: 99%

Force measurements with the atomic force microscope: Technique, interpretation and applications

Butt

Cappella

Kappl

2005

Surface Science Reports

3,123

2,898

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Section: Mechanical Properties Of Microcapsulesmentioning

confidence: 99%

Force measurements with the atomic force microscope: Technique, interpretation and applications

Butt

Cappella

Kappl

2005

Surface Science Reports

3,123

2,898

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“…Colloids have been efficiently coated with PEMs (Caruso, 2001;Sukhorukov et al, 1998b), and by dissolving the core one can also form hollow PEM microcapsules (Sukhorukov et al, 1998a). Multilayers can be formed on nearly any material (glass, quartz, silicon, most metals, etc.)…”

Section: Polyelectrolyte Multilayersmentioning

confidence: 99%

Azobenzene Polymers for Photonic Applications

Yager¹,

Barrett²

2008

Smart Light‐Responsive Materials

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“…The next study concerning this concept was published by Decher [28,29] 25 years later who re-invented the idea using polyelectrolytes to layer oppositely charged surfaces. This method has then been successfully used for layering on flat surfaces, particles and emulsions using a variety of techniques [30][31][32][33][34][35][36][37][38]. In this study, a flow-based continuous layer-by-layer method for preparation of gram quantities of capsules introduced in our previous paper [39] was used for fabrication of multi-layered polyelectrolyte shells formed around nano-emulsion droplets.…”

Section: Introductionmentioning

confidence: 99%

Layer-by-layer encapsulated nano-emulsion of ionic liquid loaded with functional material for extraction of Cd2+ ions from aqueous solutions

Elizarova

Luckham

2017

Journal of Colloid and Interface Science

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Ionic liquids can serve as an environmentally-friendly replacement for solvents in emulsions, therefore they are considered suitable to be used as an emulsified medium for various active materials one of which are extractors of metal ions. Increasing the extraction efficiency is considered to be one of the key objectives when working with such extraction systems. One way to improve the extraction efficiency is to increase the contact area between the extractant and the working ionic solution. This can be accomplished by creating a nano-emulsion of ionic liquid containing such an extractant. Since emulsification of ionic liquid is not always possible in the sample itself, there is a necessity of creating a stable emulsion that can be added externally and on demand to samples from which metal ions need to be extracted. We propose a method of fabrication of a highly-stable extractant-loaded ionic liquid-in-water nano-emulsion via a low-energy phase reversal emulsification followed by continuous layer-by-layer polyelectrolyte deposition process to encapsulate the nano-emulsion and enhance the emulsion stability. Such a multilayered stabilized nano-emulsion was tested for extraction of Cd 2+ and Ca 2+ ions in order to determine its extraction efficiency and selectivity. It was found to be effective in extraction of Cd 2+ ions with near 100% cadmium removal, as well as being selective since no Ca 2+ ions were extracted. The encapsulated emulsion was removed from samples post-extraction using two methods -filtration and magnetic separation, both of which were shown to be viable under different circumstances -larger and mechanically stronger capsules could be removed by filtration, however magnetic separation worked better for both smaller and bigger capsules. The long-term stability of nano-emulsion was also tested being a very important characteristic for its proposed use: it was found to be highly stable after four months of storage time.

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Layer-by-layer self assembly of polyelectrolytes on colloidal particles

Cited by 791 publications

References 27 publications

Force measurements with the atomic force microscope: Technique, interpretation and applications

Force measurements with the atomic force microscope: Technique, interpretation and applications

Azobenzene Polymers for Photonic Applications

Layer-by-layer encapsulated nano-emulsion of ionic liquid loaded with functional material for extraction of Cd2+ ions from aqueous solutions

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