| 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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Sztucki, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2022Controlling the rotation modes of hematite nanospindles using dynamic magnetic fields
- 2021Direct Structural Evidence for Interfacial Gradients in Asymmetric Polymer Nanocomposite Blendscitations
- 2020Packing polydisperse colloids into crystals: when charge-dispersity matterscitations
- 2020Partition of coating agents between nanoparticle interfaces and the polymer in manocompositescitations
- 2020Partition of Coating Agents between Nanoparticle Interfaces and the Polymer in Nanocompositescitations
- 2019Packing polydisperse colloids into crystals: when charge-dispersity matters
- 2019Compressive behaviour of uniaxially aligned individual mineralised collagen fibres at the micro- and nanoscalecitations
- 2019The payne effect: primarily polymer-related or filler-related phenomenon?citations
- 2019Strained Bottlebrushes in Super-Soft Physical Networkscitations
- 2018Mechanistic Insights into Polyion Complex Associationscitations
- 2016Structure of alumina-silica nanoparticles grafted with alkylphosphonic acids in poly(ethylacrylate) nanocompositescitations
- 2016Structure of alumina-silica nanoparticles grafted with alkylphosphonic acids in poly(ethylacrylate) nanocompositescitations
- 2015Surface modification of alumina-coated silica nanoparticles in aqueous sols with phosphonic acids and impact on nanoparticle interactionscitations
- 2015Surface modification of alumina-coated silica nanoparticles in aqueous sols with phosphonic acids and impact on nanoparticle interactions.citations
- 2015Origin of Small-Angle Scattering from Contrast-Matched Nanoparticles: A Study of Chain and Filler Structure in Polymer Nanocompositescitations
- 2014Tuning Structure and Rheology of Silica–Latex Nanocomposites with the Molecular Weight of Matrix Chains: A Coupled SAXS–TEM–Simulation Approachcitations
- 2013Dynamics of incipient carbon particle formation in a stabilized ethylene flame by in situ extended-small-angle- and wide-angle X-ray scatteringcitations
- 2013Dynamics of incipient carbon particle formation in a stabilized ethylene flame by in situ extended-small-angle- and wide-angle X-ray scattering.citations
- 2012Structure-property relationships of a biological mesocrystal in the adult sea urchin spinecitations
- 2012Structure-property relationships of a biological mesocrystal in the adult sea urchin spinecitations
- 2006Kinetic arrest and glass-glass transition in short-ranged attractive colloids
Places of action
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article
Origin of Small-Angle Scattering from Contrast-Matched Nanoparticles: A Study of Chain and Filler Structure in Polymer Nanocomposites
Abstract
The conformation of poly(ethyl methacrylate) chains in silica-latex nanocomposites has been studied under zero average contrast conditions (ZAC) using small-angle neutron scattering (SANS). Samples have been prepared by drying colloidal suspensions of silica and polymer nanoparticles (NPs) followed by thermal annealing, for two different silica NPs (radius of 5 and 15 nm) and two chain molecular weights (17 and 100 kg/mol). By appropriate mixing of hydrogenated and deuterated polymer, chain scattering contrast is introduced, and in principle silica scattering suppressed. The silica structure consisting mostly of small fractal aggregates is characterized by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS) on the same samples. The measurement of the chain structure by SANS, however, is perturbed by unwanted silica contributions, as often reported in the literature. Here, the contribution of contrast-matched silica is evidenced as a function of system parameters, namely chain mass, silica size, and volume fraction, and a model rationalizing these contributions for the first time is proposed. On the basis of a statistical analysis, a nanometer-thick polymer shell surrounding silica NPs is shown to create contrast, which is presumably maintained by the reduced mobility of polymer close to interfaces or attractive polymer silica interactions. This shell is proven to be quantitatively important only for the smallest silica NPs. Finally, the pure polymer scattering can be isolated, and the polymer radius of gyration is found to be independent of filler content and NP size.