| 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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Pugliara, Alessandro
Institut de Mathématiques de Marseille
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2024Spray-dried ternary bioactive glass microspheres: Direct and indirect structural effects of copper-doping on acellular degradation behaviorcitations
- 2024Phase transformation kinetics in Ti 575 titanium alloy during heat treatment: Role of the initial microstructure during ageingcitations
- 2024Multiscale study of additively manufactured 316 L microstructure sensitivity to heat treatment over a wide temperature rangecitations
- 2024New insights on the origin of grain refinement in 316L additively manufactured alloyscitations
- 2024Catalytic atomic layer deposition of amorphous alumina–silica thin films on carbon microfiberscitations
- 2023Single-Step PEDOT Deposition by oCVD for ITO-Free Deep Blue OLEDscitations
- 2023Single-Step PEDOT Deposition by oCVD for ITO-Free Deep Blue OLEDscitations
- 2023Amorphous Alumina Thin Films Deposited on Carbon Microfibers As Interface Layer for Thermal Oxidation Barrierscitations
- 2020The 3D Design of Multifunctional Silver Nanoparticle Assemblies Embedded in Dielectricscitations
- 2020Oxidation of Ti–6Al–4V alloy between 450 and 600°C. Evolution of microstructure and mechanical propertiescitations
- 2020Solid-State Phase Transformations Involving (Nb,Mo)2CrB2 Borides and (Nb,Ti)2CS Carbosulfides at the Grain Boundaries of Superalloy Inconel 718citations
- 2020Growth Kinetics and Characterization of Chromia Scales Formed on Ni–30Cr Alloy in Impure Argon at 700 °Ccitations
- 2020STEM observation of a multiphase nucleus of spheroidal graphitecitations
- 2019Solidification sequence and four-phase eutectic in AlSi6Cu4Fe2 alloycitations
- 2018Black co oxides coatings for thermosensitive polymer surfaces by low-temperature DLI-MOCVD.citations
- 2018Black co oxides coatings for thermosensitive polymer surfaces by low-temperature DLI-MOCVD.citations
- 2018Influence of the microstructure on the corrosion behaviour of 2024 aluminium alloy coated with a trivalent chromium conversion layercitations
- 2018Black Co oxides coatings for thermosensitive polymer surfaces by low- temperature DLI-MOCVDcitations
- 2016Elaboration of nanocomposites based on Ag nanoparticles embedded in dielectrics for controlled bactericide properties ; Elaboration of thin nanocomposite layers based on Ag nanopartiles embedded in silica for controlled biocide properties
- 2016Elaboration of thin nanocomposite layers based on Ag nanopartiles embedded in silica for controlled biocide properties
- 2016Plasma based concept for engineering of multifunctional materials with application to synthesis of large-area plasmonic substrates and to control the charge injection in dielectrics
- 2015Assessing bio-available silver released from silver nanoparticles embedded in silica layers using the green algae Chlamydomonas reinhardtii as bio-sensorscitations
Places of action
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thesis
Elaboration of thin nanocomposite layers based on Ag nanopartiles embedded in silica for controlled biocide properties
Abstract
Silver nanoparticles (AgNPs) because of their strong biocide activity are widely used in health-care sector, food industry and various consumer products. Their huge surface-volume ratio enhances the silver release compared to the bulk material, leading to an increased toxicity for microorganisms sensitive to this element. This work presents an assessment of the biocide properties on algal photosynthesis of small (<20 nm) AgNPs embedded in silica layers. Two physical approaches were used to elaborate these nanocomposites: (i) low energy ion beam synthesis and (ii) combined silver sputtering and plasma polymerization. These techniques allow elaboration of a single layer of AgNPs embedded in silica films at defined nanometer distances (from 0 to 7 nm) beneath the free surface. The structural and optical properties of the nanocomposites were studied by transmission electron microscopy, reflectance spectroscopy and ellipsometry. This last technique, coupled to modelling based on the quasi-static approximation of the classical Maxwell-Garnett formalism, allowed detection of small variations over the size and density of the embedded AgNPs. The silver release from the nanostructures after immersion in buffered water was measured by inductively coupled plasma mass spectrometry. The short-term toxicity of Ag to the photosynthesis of green algae, Chlamydomonas reinhardtii, was assessed by fluorometry. Embedding AgNPs reduces their interactions with the buffered water, protecting the AgNPs from fast oxidation. The release of bio-available silver (impacting on the algal photosynthesis) is controlled by the depth at which AgNPs are located for the given host silica matrix. This provides a procedure to tailor the biocide effect of nanocomposites containing AgNPs. By coupling the controlled antimicrobial properties of the embedded AgNPs and their quality as plasmonic antenna, these coatings can be used to detect and prevent the first stages of biofilm formation. Hence, the last part of this work is dedicated to a study of the structural stability and adsorption properties of Discosoma recombinant red (DsRed) fluorescent proteins deposited on these dielectric surfaces with perspectives of development of SERS devices.