A5031043220- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Gas Sensing Nanomaterials and Sensors
- Photonic Crystals and Applications
- Semiconductor Quantum Structures and Devices
- Crystallization and Solubility Studies
- Advanced Chemical Sensor Technologies
- Nuclear materials and radiation effects
- Ionic liquids properties and applications
- Molecular Junctions and Nanostructures
- Transition Metal Oxide Nanomaterials
- Analytical Chemistry and Sensors
- Thermal Expansion and Ionic Conductivity
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Advanced Thermoelectric Materials and Devices
- Extraction and Separation Processes
- Mesoporous Materials and Catalysis
- Diamond and Carbon-based Materials Research
- Advanced battery technologies research
- Nanomaterials for catalytic reactions
- High-pressure geophysics and materials
- Nanocluster Synthesis and Applications
- Polyoxometalates: Synthesis and Applications
- Zeolite Catalysis and Synthesis
Laboratoire de Cristallographie et Sciences des Matériaux
2016-2022
Centre National de la Recherche Scientifique
2016-2021
École Nationale Supérieure de Chimie de Rennes
2021
Université de Rennes
2021
Normandie Université
2018
École Nationale Supérieure d'Ingénieurs de Caen
2016-2018
Lomonosov Moscow State University
2013-2018
Moscow State University
2016-2018
Université de Caen Normandie
2018
We report a simple low-cost concept for the preparation of water-oxidation electrocatalyst via modification self-supported Ni5P4–Ni2P foam catalyst precursor with Al. As an anode alkaline oxygen evolution reaction, this material exhibits impressive Tafel slope 27 mV dec–1 and offers anodic current densities 10, 100, 300 mA cm–2 at overpotentials merely 180, 247, 312 mV, respectively. Moreover, demonstrates high operational stability, as reflected by steady-state performance more than 8 days....
Nanocrystalline cobalt oxide Co₃O₄ has been prepared by precipitation and subsequent thermal decomposition of a carbonate precursor, characterized in detail using XRD, transmission electron microscopy, FTIR spectroscopy. The sensory characteristics the material towards carbon monoxide concentration range 6.7-20 ppm have examined both dry humid air. A sensor signal is achieved air at sufficiently low temperatures T = 80-120 °C, but increase relative humidity results disappearance this...
AlFe<sub>2</sub>B<sub>2</sub> pre-catalyst produces a nanocrystalline Fe<sub>3</sub>O<sub>4</sub> shell in alkaline media. The system acts as remarkably stable water oxidation electrocatalyst.
Abstract The high‐pressure and high‐temperature technique is the most promising for mass production of ultra‐small diamond nanoparticles perfect structure. In present work, this was successfully used synthesis nanodiamonds from their molecular analogue, adamantane. A minimum size synthesized crystals about 3 nm reached. It found that decisive condition stable adamantane under pressures below limit value required direct conversion graphite into minimization carbon sample loss during...
Structural analysis of colusite phases by neutron diffraction pattern refinement and high resolution transmission electron microscopy.
Sub-nanometer silver clusters that exhibit discrete electronic structure with molecular-like properties are highly desirable in various technologies. However, the methods for their preparation suffer from limitations related reproducibility and particles uniformity and/or possibility of scale-up. Another critical drawback is free sub-nanometer tend to aggregate into larger particles. In this work, a new approach successfully overcomes above developed. It allows, first time, an ultrafast high...
Zinc-doped InP(Zn) colloidal quantum dots (QDs) with narrow size distribution and low defect concentration were grown for the first time via a novel phosphine synthetic route over wide range of Zn doping. We report influence on optical properties obtained dots. propose mechanism introduction in QDs show that incorporation atoms into InP lattice leads to formation acceptor levels luminescence tail red region spectra. Using photochemical etching HF, we confirmed dopant are situated inside...
A simple and fast synthetic approach to produce highly luminescent InP/ZnX (X = Se, S) core–shell QDs on the basis of a phosphine route has been realized.
Semiconductor nanoparticles (SNPs) are a valuable building block for functional materials. Capabilities engineering of electronic structure SNPs can be further improved with development techniques doping by diffusion, as post-synthetic introduction impurities does not affect the nucleation and growth SNPs. Diffusion dopants from an external source also potentially allows temporal control radial distribution impurities. In this paper we report on Si/SiO x annealing particles in gaseous...
InP QDs doping by silver <italic>via</italic> a PH<sub>3</sub>-based synthetic route results in the formation of Ag-doped and core–shell Ag/InP nanostructures.
Recently, a new simple and fast method for the synthesis of InP quantum dots by using phosphine as phosphorous precursor myristic acid surface stabilizer was reported. Purification after is necessary to obtain samples with good optical properties. Two methods purification were compared processes which occur during studied. Traditional precipitation acetone accompanied small increase in photoluminescence. It occurs that hydrolysis indium takes place, leads better passivation. The...
We report the synthesis of colloidal CdSe quantum dots doped with a novel Ag precursor: AgCl. The addition AgCl causes dramatic changes in morphology synthesized nanocrystals from spherical nanoparticles to tetrapods and finally large ellipsoidal nanoparticles. Ellipsoidal possess an intensive near-IR photoluminescence ranging up 0.9 eV (ca. 1400 nm). In this article, we explain reasons for formation as well peculiarities process. structure, content, optical properties are also investigated....
Sn nanostructured thin films prepared by electrodeposition in an ionic liquid directly on a Cu substrate provided high performance as Li-ion negative electrodes.
A large class of colloidal multi-micron mesoporous silica particles have well-defined cylindrical nanopores, nanochannels which self-assembled in the templated sol-gel process. These are broad interest photonics, for timed drug release, enzyme stabilization, separation and filtration technologies, catalysis, etc. Although pore geometry mechanism formation such has been widely investigated at nanoscale, their its a larger (extended) scale is still under debate. The extended paramount all...
This chapter describes recent advances in the synthesis of transition metal nanoparticles neat water and their use as efficient, active, selective aqueous catalysts for various applications including hydrogenation, oxidation, carbon–carbon coupling reactions. contribution reports different synthetic methodologies using unique properties exerted by efficient capping agents to maintain stability particles within phase, such water-soluble ligands, surfactants, polymers. In addition, catalytic...