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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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Martin, Céline
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2022Optical Properties of Tungsten: A Parametric Study to Characterize the Role of Roughness, Surface Composition and Temperaturecitations
- 2022Optical Properties of Tungsten: A Parametric Study to Characterize the Role of Roughness, Surface Composition and Temperaturecitations
- 2018Single-crystal and polycrystalline diamond erosion studies in Pilot-PSIcitations
- 2017Advanced spectroscopic analyses on a:C-H materials: Revisiting the EELS characterization and its coupling with multi-wavelength Raman spectroscopycitations
- 2017Tungsten oxide thin film bombarded with a low energy He ion beam: evidence for a reduced erosion and W enrichmentcitations
- 2017Tungsten oxide thin film exposed to low energy He plasma: Evidence for a thermal enhancement of the erosion yieldcitations
- 2016Study of the pores inside tungsten coating after thermal cycling for fusion devicecitations
- 2015In-plane and out-of-plane defects of graphite bombarded by H, D and He investigated by atomic force and Raman microscopiescitations
- 2015Multi-technique coupling for analysis of deuterium retention in carbon fiber composite NB31citations
- 2014Multiwavelength Raman spectroscopy analysis of a large sampling of disordered carbons extracted from the Tore Supra tokamakcitations
- 2014Thermal stability and long term hydrogen/deuterium release from soft to hard amorphous carbon layers analyzed using in-situ Raman spectroscopy. Comparison with Tore Supra depositscitations
- 2014Raman microscopy as a defect microprobe for hydrogen bonding characterization in materials used in fusion applicationscitations
- 2013Raman spectroscopy investigation of the H content of heated hard amorphous carbon layerscitations
- 2013Long Term H-Release from Amorphous Carbon Evidenced by in Situ Raman Microscopy under Isothermal Heatingcitations
- 2013Simultaneous deuterium implantation and ion beam microanalyses in CFC NB31: Understanding the in-bulk migrationcitations
- 2012Raman micro-spectroscopy as a tool to measure the absorption coefficient and the erosion rate of hydrogenated amorphous carbon films heat-treated under hydrogen bombardmentcitations
- 2011Raman study of CFC tiles extracted from the toroidal pump limiter of Tore Supracitations
- 2010Structure of the carbon layers deposited on the toroidal pump limiter of Tore Supracitations
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article
Advanced spectroscopic analyses on a:C-H materials: Revisiting the EELS characterization and its coupling with multi-wavelength Raman spectroscopy
Abstract
Hydrogenated amorphous carbon thin films (a:C-H) are very promising materials for numerous applications. The growing of relevance of a:C-H is mainly due to the long-term stability of their outstanding properties. For improving their performances, a full understanding of their local chemistry is highly required. Fifteen years ago, electron energy-loss spectroscopy (EELS), developed in a transmission electron microscope (TEM), was the technique of choice to extract such kind of quantitative information on these materials. Other optical techniques, as Raman spectroscopy, are now clearly favored by the scientific community. However, they still lack of the spatial resolution offered by TEM-EELS. In addition, nowadays, the complexity of the physics phenomena behind EELS is better known. Here, a:C-H thin films have been isothermally annealed and the evolution of their physical and chemical parameters have been monitored at the local and macroscopic scales. In particular, chemical in-depth inhomogeneities and their origins are highlighted. Furthermore, a novel procedure to extract properly and reliably quantitative chemical information from EEL spectra is presented. Finally, the pertinence of empirical models used by the Raman community is discussed. These works demonstrate the pertinence of the combination of local and macroscopic analyses for a proper study of such complex materials. ; The TEM and EELS studies were conducted at the Laboratorio de Microscopias Avanzadas, Instituto de Nanociencia de Aragon, Universidad de Zaragoza, Spain. Some of the research leading to these results has received funding from the European Union Seventh Framework Programme under Grant Agreements 312483- ESTEEM2 (Integrated Infrastructure Initiative – I3) and 604391 Graphene Flagship, as well as from EU H2020 Grant Agreement 696656 Graphene Flagship. R.A. acknowledges funding from the Spanish Ministerio de Economia y Competitividad (FIS2013-46159-C3-3-P), from the Government of Aragon and the European Social Fund under the project ...