| 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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Bardeau, Jean-François
Université d'Orléans
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024Green Luminescence in Zero-Dimensional Lead bromide hybrid material (C5H9N3)2PbBr6: Experimental and Theoretical Studiescitations
- 2023In situ mapping of biomineral skeletal proteins by molecular recognition imaging with antibody-functionalized AFM tipscitations
- 2023Quantitative PEEM and Raman study of nanorough Au SERS-Active substrates for molecular sensing applicationscitations
- 2023One-step electrochemical elaboration of SnO2 modified electrode for lead ion trace detection in drinking water using SWASVcitations
- 2022Synthesis, structural and electrical characterization of a new organic inorganic bromide: [(C3H7)4N]2CoBr4citations
- 2021Phase diagram and transition temperatures in the system (T-T’) La2-xNdxCuO4 (x ≤ 0.5)citations
- 2019Antibiofilm Activity of Polyamide 11 Modified with Thermally Stable Polymeric Biocide Polyhexamethylene Guanidine 2-Naphtalenesulfonatecitations
- 2017Unexpected magnetic properties explained by the homogeneity of mixed ferritescitations
- 2016Structural behavior of laser-irradiated γ-Fe 2 O 3 nanocrystals dispersed in porous silica matrix : γ-Fe 2 O 3 to α-Fe 2 O 3 phase transition and formation of ε-Fe 2 O 3citations
- 2016Structural behavior of laser-irradiated γ-Fe 2 O 3 nanocrystals dispersed in porous silica matrix : γ-Fe 2 O 3 to α-Fe 2 O 3 phase transition and formation of ε-Fe 2 O 3citations
- 2016Understanding of the mechanical and structural changes induced by alpha particles and heavy ions in the French simulated nuclear waste glasscitations
- 2015The Inhibitive Effect of Cerium Carbonate on the Corrosion of Brass in 3% NaCl Solutioncitations
- 2015Experimental evidence of ultrathin polymer film stratification by AFM force spectroscopycitations
- 2015The effect of temperature on carbon steel corrosion under geological conditionscitations
- 2015Full-field and contact-less topography of nanometric thin films based on multiwavelength interferometrycitations
- 2014Assignment of Raman-active vibrational modes of tetragonal mackinawite: Raman investigations and ab initio calculationscitations
- 2014Carbon steel corrosion in clay-rich environmentcitations
- 2014Magnetic interactions in γ-Fe 2 O 3 @SiO 2 nanocompositescitations
- 2014The Corrosion Behavior of Carbon Steel in Sulfide Aqueous Media at 30 degrees Ccitations
- 2013A Preliminary Investigation of the ISG Glass Vapor Hydrationcitations
- 2013Impact of a sulphidogenic environment on the corrosion behavior of carbon steel at 90 °Ccitations
- 2013Insight into the mechanism of carbon steel corrosion under aerobic and anaerobic conditionscitations
- 2012Insights into the Mechanism Related to the Phase Transition from γ-Fe2O3 to α-Fe2O3 Nanoparticles Induced by Thermal Treatment and Laser Irradiationcitations
- 2011Site-Selective Surface Modification Using Enzymatic Soft Lithographycitations
- 2008Morphology and Glass Transition of Thin Polylactic Acid Films
- 2005Metal-insulator transition in thin films of RxR ' 1-xNiO3 compounds: DC electrical conductivity and IR spectroscopy measurementscitations
Places of action
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article
Insights into the Mechanism Related to the Phase Transition from γ-Fe2O3 to α-Fe2O3 Nanoparticles Induced by Thermal Treatment and Laser Irradiation
Abstract
The nature of the physical mechanisms related to the gamma-Fe2O3 to alpha-Fe2O3 phase transition under laser irradiation and heat treatment has been investigated using in situ micro-Raman spectroscopy and X-ray powder diffraction (XRPD) analysis. Measurements were carried out on as-prepared gamma-Fe2O3 nanoparticles of about 4 nm in size as a function of laser power and on annealed gamma-Fe2O3 particles. Annealing temperature affects the relative fractions of the gamma-Fe2O3 and alpha-Fe2O3 phases, and at 450 degrees C, the phase transition into alpha-Fe2O3 becomes complete with apparent crystallite size < D > of about 30 nm. The hematite nanoparticles increase then up to more than 180 nm at 1400 degrees C. The excellent agreement between evolution of the wavenumbers and bandwidths confirms that the heat treatment and laser irradiation produces the same effects on nanoparticles. Correlations between structure modifications occurring at the nanometric scale during grain coalescence and the evolution of Raman vibrational spectra were quantitatively examined, and a physical mechanism for the gamma -> alpha-Fe2O3 phase transition was proposed.