| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Briscoe, Wuge H.
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant: Transition from synergy to competitioncitations
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant: Transition from synergy to competitioncitations
- 2022Interfacial complexation of a neutral amphiphilic ‘tardigrade’ co-polymer with a cationic surfactant:Transition from synergy to competition
- 2021Heads or tails:Nanostructure and molecular orientations in organised erucamide surface layerscitations
- 2021Friction at nanopillared polymer surfaces beyond Amontons' laws:Stick-slip amplitude coefficient (SSAC) and multiparametric nanotribological propertiescitations
- 2021Friction at nanopillared polymer surfaces beyond Amontons' lawscitations
- 2021Heads or tailscitations
- 2020Mixed liposomes containing gram-positive bacteria lipidscitations
- 2020Interactions between PAMAM dendrimers and DOPC lipid multilayerscitations
- 2020Synergy, competition, and the “hanging” polymer layer:Interactions between a neutral amphiphilic ‘tardigrade’ comb co-polymer with an anionic surfactant at the air-water interfacecitations
- 2020Synergy, competition, and the “hanging” polymer layer: Interactions between a neutral amphiphilic ‘tardigrade’ comb co-polymer with an anionic surfactant at the air-water interfacecitations
- 2020Multiscale characterisation of single synthetic fibres:Surface morphology and nanomechanical propertiescitations
- 2020Interactions between PAMAM dendrimers and DOPC lipid multilayers:Membrane thinning and structural disordercitations
- 2019Bénard-Marangoni Dendrites upon Evaporation of a Reactive ZnO Nanofluid Dropletcitations
- 2018Surface structure of few layer graphenecitations
- 2017Interfacial and structural characteristics of polyelectrolyte multilayers used as cushions for supported lipid bilayerscitations
- 2016Influence of solvent polarity on the structure of drop-cast electroactive tetra(aniline)-surfactant thin filmscitations
- 2016Influence of solvent polarity on the structure of drop-cast electroactive tetra(aniline)-surfactant thin filmscitations
- 2016Structure of lipid multilayerscitations
- 2016Structure of lipid multilayers:Via drop casting of aqueous liposome dispersionscitations
- 2016Hydrophilic nanoparticles stabilising mesophase curvature at low concentration but disrupting mesophase order at higher concentrationscitations
- 2016Stability of polymersomes prepared by size exclusion chromatography and extrusioncitations
- 2014In situ X-ray reflectivity studies of molecular and molecular-cluster intercalation within purple membrane filmscitations
- 2014In situ X-ray reflectivity studies of molecular and molecular-cluster intercalation within purple membrane filmscitations
- 2011Lamellar nanocomposite films of purple membrane and poly(acrylate)
- 2010Assembly of poly(methacrylate)/purple membrane lamellar nanocomposite films by intercalation and in situ polymerisationcitations
Places of action
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article
Stability of polymersomes prepared by size exclusion chromatography and extrusion
Abstract
In this work, stability of poly(butadiene)-poly(ethylene oxide) (PBD-PEO) polymersomes, self-assembled from two polymers with different molecular weights (PBD32-PEO21 and PBD125-PEO80) in either pure H2O or phosphate buffered saline (PBS), is studied. Polymersome dispersions usually show large polydispersity, and it is thus desirable to separate different-sized vesicles if a narrow size distribution is required, e.g. for model systems in certain applications. This is typically achieved by extrusion through a membrane with a designated pore size or, less commonly, by size exclusion chromatography (SEC). Here, we find that both extrusion and SEC of polymersome dispersions with vesicle sizes ranging from 100–5000 nm and polydispersity index (PDI) = 1, can yield smaller vesicles with PDIs < 0.35. With SEC, it is possible to separate fractions of polymersomes with different sizes. However, the SEC polymersome size and particularly the spread in the size increase significantly over time, whereas the extruded polymersomes are shown to be more stable. We attribute this to possible dilution of the polymersome dispersion during the SEC elusion process. The effects of temperature and the PBD-PEO molecular weight on the stability of the extruded polymersomes against dilution in pure water and phosphate buffer are further studied. It is found that the polymersomes show higher stability when stored at lower temperature, undiluted, and prepared in phosphate buffer, whereas the polymer molecular weight does not have a large influence on the stability.