A5058688179- Carbon Nanotubes in Composites
- Electrochemical Analysis and Applications
- Diamond and Carbon-based Materials Research
- Graphene research and applications
- Electrochemical sensors and biosensors
- Photochemistry and Electron Transfer Studies
- Conducting polymers and applications
- Spectroscopy and Quantum Chemical Studies
- Porphyrin and Phthalocyanine Chemistry
- Lipid Membrane Structure and Behavior
- Spectroscopy and Chemometric Analyses
- Fullerene Chemistry and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Neuroscience and Neural Engineering
- Mechanical and Optical Resonators
- Silicon Nanostructures and Photoluminescence
- Semiconductor materials and devices
- Photosynthetic Processes and Mechanisms
- Photochromic and Fluorescence Chemistry
- Supercapacitor Materials and Fabrication
- Photopolymerization techniques and applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Molecular Junctions and Nanostructures
- Molecular spectroscopy and chirality
- Force Microscopy Techniques and Applications
Laboratoire de Chimie Physique et Microbiologie pour l'Environnement
2014-2024
Université de Lorraine
2014-2024
Centre National de la Recherche Scientifique
2013-2024
Institut des Matériaux Jean Rouxel
2010
Institut Jean Lamour
2010
Nantes Université
2010
Milieux environnementaux, transferts et interactions dans les hydrosystèmes et les sols
2008
CEA Paris-Saclay
2006
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2006
Université de Haute-Alsace
2001-2005
The vibrational properties of CaCO(3) aragonite have been investigated both theoretically, by using a quantum mechanical approach (all electron Gaussian type basis set and B3LYP HF-DFT hybrid functional, as implemented in the CRYSTAL code) experimentally, collecting polarized infrared (IR) reflectance Raman spectra. combined use theory experiment permits on one hand to analyze many subtle features measured spectra, other evidentiate limits deficiencies approaches. full TO LO IR active modes,...
Atomic layer deposition (ALD) of nickel and carbide is reported starting from acetylacetonate a primary alcohol. The sequential reactions both reactants with the adsorbed species are shown to be self-limited. Use propanol or ethanol as reducing agents yields formation technologically relevant carbon-Ni3C thin films, whereas carbon content use methanol less than 5 atom %. These metallic films electrically conductive feature soft ferromagnetic behavior. thermally stable cubic lattice was grown...
Shearforce regulated scanning electrochemical microscopy (SECM) has been associated with Raman microspectrometry in order to perform combined and spectrochemical analysis on reactive interfaces. The interest of the method was evaluated by analyzing local corrosion phenomena damaged Zn(Mg, Al) self-healing coatings deposited steel. Despite high aspect ratio analyzed sample displaying here more than a 50 μm depth profile, optimized setup allowed (1) precise electrode positioning help...
Nacre (or mother of pearl) can facilitate bone cell differentiation and speed up their mineralization. Here we report on the capability nacre to induce human marrow mesenchymal stem cells (hBM-MSCs) production extracellular matrix. hBM-MSCs were encapsulated in an alginate hydrogel containing different concentrations powdered cultured same environment until Day 28. Analysis osteogenic gene expression, histochemistry, second harmonic generation (SHG) microscopy, Raman scattering spectroscopy...
We examined the respective influence of a sequential or continuous hypoxia during expansion and transforming growth factor beta 1-driven chondrogenic differentiation human bone marrow mesenchymal stem cells (MSCs). The was performed within alginate beads, classical tool for implantation MSCs joint. standard normoxic 2D (expansion) 3D (differentiation) cultures served as reference. To determine quality chondrogenesis, we analyzed typical markers such type II X collagens, SOX9, COMP, versican,...
One of the many evolved functions photosynthetic organisms is to synthesize light harvesting nanostructures from photoactive molecules such as porphyrins. Engineering synthetic analogues with optimized molecular order necessary for efficient capture and harvest energy remains challenging. Here, we address this challenge by reporting self-assembly zinc(II) meso-tetrakis(4-carboxyphenyl)porphyrins into films highly ordered nanostructures. The process takes place selectively at interface...
Interfacial processes controlled by ion transfer voltammetry at the interface between two immiscible electrolyte solutions were studied in situ Raman spectroscopy. spectra of a 5 mM NaCl aqueous solution and 10 bis(triphenyl-phosphoranydieneammonium) tetrakis(4-chlorophenyl)borate 1,2-dichloroethane recorded open circuit potential various interfacial differences. At open-circuit potential, peaks assigned to vibrational modes are clearly visible weak intensity measured for organic ions. When...
Single-wall carbon nanotubes (SWNTs) have been functionalized by a diazonium method through both classical thermal reaction and microwave-assisted reaction. The SWNTs characterized nIR-Vis-UV absorption spectroscopy, Raman gravimetric analysis. results show that are covalently reactions the is more rapid. Moreover, optimal choice of time can prevent microwave irradiation from adverse effect subsequently removing functional groups on SWNT surface.
Abstract We report on a systematic study of the influence laser irradiation Raman spectra HiPco‐produced single‐wall CNTs. Specifically, we have examined response bundled CNTs to: i) power density; ii) exposure time and iii) photon energy (1.96 2.33 eV). Our results show that irreversible destruction in bundles can occur at even low density (0.15 kW/cm 2 ). The tubes with smaller diameters are influenced first rate CNT increases energy. Finally, determined when investigating bundles, use is...
An aqueous colloidal suspension of gold nanoparticles (AuNPs) may be condensed into a thin fractal film at the polarizable liquid–liquid interface formed between two immiscible electrolyte solutions upon injection millimolar concentrations sodium chloride to phase. By adjusting interfacial polarization conditions (negative, intermediate, and positive open-circuit potentials), morphology is modified, resulting in unique surface plasmon properties film, which enable situ surface-enhanced Raman...
Several studies have shown that the staining by fluorochromes (DAPI, SYBR Green II, and TOTO-1) of bacteria is altered chlorination. To evaluate effect chlorine (bleach solution) on propidium iodide (PI) staining, we studied Escherichia coli in suspension biomolecules solution (DNA, RNA, BSA, palmitic acid, dextran) first subjected to then neutralized sodium thiosulphate. The suspensions solutions were subsequently stained with PI. fluorescence intensity PI-stained DNA RNA dramatically...