| 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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Prévost, Sylvain
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Confinement induced change of microemulsion phase structure in controlled pore glass (CPG) monolithscitations
- 2024Dynamic Covalent Amphiphilic Polymer Conetworks Based on End-Linked Pluronic F108: Preparation, Characterization, and Evaluation as Matrices for Gel Polymer Electrolytes
- 2023Rheological Control of Aqueous Dispersions by Thermoresponsive BAB* Copolymers of Different Architecturescitations
- 2021Spontaneous Ouzo Emulsions Coexist with Pre-Ouzo Ultraflexible Microemulsionscitations
- 2019Spontaneous Ouzo nanoemulsions co-exist with pre-Ouzo aggregates
- 2019Temperature dependent self-organization of DMPC membranes promoted by intermediate amounts of the saponin aescincitations
- 2018Preparation of Polymer Brush Grafted Anionic or Cationic Silica Nanoparticles: Systematic Variation of the Polymer Shellcitations
- 2016In Situ Probing of Stack-Templated Growth of Ultrathin Cu2-xS Nanosheetscitations
- 2016In situ probing of stack-templated growth of ultrathin Cu 2-x S nanosheets
- 2015Structure of reverse microemulsion-templated metal hexacyanoferrate nanoparticles
- 2012Structure of reverse microemulsion-templated metal hexacyanoferrate nanoparticles
- 2012Structure of reverse microemulsion-templated metal hexacyanoferrate nanoparticlescitations
- 2010Amphiphilic dual brush block copolymers as "giant surfactants" and their aqueous self-assemblycitations
Places of action
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article
Spontaneous Ouzo Emulsions Coexist with Pre-Ouzo Ultraflexible Microemulsions
Abstract
<p>Even in the absence of surfactants, polymers, or particles, spontaneous emulsions produced by dilution with water can be stable over days. This "Ouzo effect"used by the industry is obtained by rapid dilution from an identified "pre-Ouzo"domain of composition where weak aggregates are present: nanometer-sized clusters covered by a surface layer enriched in a hydrotrope such as ethanol. In these systems, Ostwald ripening is not an effective destabilizing mechanism. Using in situ autodilution small-angle X-ray scattering (SAXS), we follow the morphological transitions occurring in a ternary mixture of water/n-octanol/ethanol throughout the monophasic and biphasic regions. This allows for the first time an online characterization of the multiscale coexisting microstructures. Small-angle neutron scattering (SANS) profiles on metastable emulsions as well as phase-separated samples complete the SAXS data, taking advantage of contrast variation via isotopic substitution. After crossing the phase boundary into the two-phase region, coexisting phases are both ternary solutions structured at the nanometer scale when the emulsion is stable. The transition from single phase to two phases is asymmetric around the plait point. When the initial concentration of the hydrotrope is below the minimum hydrotrope concentration (MHC), emulsification failure occurs, i.e., emulsions cream within seconds. Beyond MHC, the low interfacial tension between coexisting ternary fluids results in a Laplace pressure below 100 Pa, explaining the puzzling resilience of spontaneous emulsion to the universal mechanism of Ostwald ripening.</p>