A5022910560- Physics of Superconductivity and Magnetism
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- Conservation Techniques and Studies
- Cultural Heritage Materials Analysis
- Catalysis and Oxidation Reactions
- Chemical Reaction Mechanisms
- Advanced Thermoelectric Materials and Devices
- Microwave Dielectric Ceramics Synthesis
- Ferroelectric and Piezoelectric Materials
- Building materials and conservation
- Nuclear materials and radiation effects
- Organic Chemistry Cycloaddition Reactions
- X-ray Diffraction in Crystallography
- High-pressure geophysics and materials
- Inorganic Chemistry and Materials
- Superconductivity in MgB2 and Alloys
- Crystallography and molecular interactions
- Metallurgical and Alloy Processes
- Crystal structures of chemical compounds
- Phase-change materials and chalcogenides
University of Genoa
2015-2024
National Interuniversity Consortium of Materials Science and Technology
2006-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2013-2018
Industriale Chimica (Italy)
2000-2013
Istituto Nazionale per la Fisica della Materia
2000-2001
University of Milan
1992-1997
Ten zirconia powders have been characterized by XRD, FT-IR/FT-FIR and Raman skeletal spectroscopies DR-UV electronic spectroscopy. The vibrational features of a yttria-stabilized cubic tetragonal, monoclinic tetragonal + pure mixtures discussed. Assignments for the samples are proposed. origin very broad peaks in is briefly addressed. spectra provide evidence presence trigonal oxide ions phase only. UV show that (where coordination zirconium sevenfold) absorbs at lower energy than phases...
A structural study of Sm- and Gd-doped ceria was performed with the aim to clarify some unexplained features. (Ce1-xREx)O2-x/2 samples (RE ≡ Sm, Gd; x = 0, 0.1, ..., 1) were prepared by coprecipitation mixed oxalates subsequent thermal treatment at 1473, 1173, or 1073 K in air; they then analyzed room temperature both synchrotron X-ray diffraction μ-Raman spectroscopy. Two models adopted fit experimental data, namely, a fluoritic one, resembling CeO2 structure low RE content, hybrid one...
A room temperature structural study has been performed through the whole compositional range of (Ce1–xLux)O2–x/2 system by synchrotron X-ray diffraction and μ-Raman spectroscopy. Samples were synthesized thermal treatment in air at 1373 K coprecipitated mixed oxalates. CeO2-based solid solution with a fluorite-type structure (F) was found to be stable up x = 0.4, while higher Lu content (F + C) biphasic region observed, C being cubic atomic arrangement typical sesquioxides heaviest rare...
The evolution of the defect structure and microstructure heavily Gd-doped ceria for different synthetic pathways is investigated to explore way defects interact with each other in a composition range known effectively hamper application material as electrolyte.
Abstract The tensile properties and fracture surfaces of N ‐methylmorpholine‐ ‐oxide (NMMO) regenerated silk fibroin fibers produced with a range draw ratios has been characterized related to their microstructure data obtained from Raman spectroscopy birefringence measurements. spinning process allows control two different ratios, coagulation, postspinning, it found that the can be modified by proper combination both ratios. NMMO subjected postspinning drawing yield comparable other strain...
Sm-Doped ceria is one of the most promising materials to be used as electrolyte in solid oxide fuel cells due its remarkable ionic conductivity values intermediate temperature range. Transport properties and local structural features Ce1-xSmxO2-x/2 (0.1 ≤ x 0.7) were studied by an impedance/μ-Raman spectroscopy coupled approach up 1073 K. Results suggest that C-based nanosized defect clusters are responsible for drop observed even at = 0.2, i.e. a Sm content lower than necessary allow C...
In order to contribute the improvement of restoration and conservation sciences metallic artefacts belonging Cultural Heritage, a wide research has been started on study artificial (artistic) natural (corrosion or alteration) patinas copper‐based alloys. Micro‐Raman spectroscopy (μRS) coupled with scanning electron microscopy (SEM) equipped energy Dispersive X‐Ray Spectroscopy (EDXS) were applied for characterization number made substrate reproducing typical alloys used statuary. A non...
A structural study of the filled skutterudite Smy(FexNi1-x)4Sb12 was performed by means X-ray powder diffraction and μ-Raman spectroscopy with aim to unveil correlations between electronic properties this material favor improvement its thermoelectric performance. Samples were prepared direct reaction elements at 1223 K, followed quenching subsequent sintering 873 K; microstructure composition obtained products determined SEM-EDS. The position boundary separating regions that obey hole-...
For the first time structural properties at local scale of doubly-doped ceria systems are discussed.
The structural, microstructural, Raman and ionic conductivity properties of (Gd,Sm)-doped ceria were studied compared to the ones similar systems with aim deepening comprehension correlations between defect chemistry movement oxygen vacancies in such materials, which are ideal candidates as electrolytes solid oxide cells. system was chosen it combines advantages using most effective doping ions for ceria, namely Sm3+ Gd3+, expected positive effects multiple doping. main effect double on...
The evolution with temperature of the Raman activity in (1−x)Pb(Fe2∕3W1∕3)O3-xPbTiO3 solid solution various compositions x∊(0,1) was investigated. By increasing x, a general system from disordered relaxor to ordered ferroelectric state typical lines also observed other Pb-based relaxors were found. present at few hundred degrees above Curie region confirms thermal stability nanopolar regions nonordered average cubic state. For all examined samples, position, intensity, or damping exhibit...