A5006160345- Corrosion Behavior and Inhibition
- Magnesium Alloys: Properties and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Electrohydrodynamics and Fluid Dynamics
- Nonlinear Optical Materials Studies
- X-ray Diffraction in Crystallography
- Metal and Thin Film Mechanics
- Nanoplatforms for cancer theranostics
- Aluminum Alloys Composites Properties
- Crystallization and Solubility Studies
- nanoparticles nucleation surface interactions
- Mesoporous Materials and Catalysis
- Laser-induced spectroscopy and plasma
- Plasmonic and Surface Plasmon Research
- Silicon Nanostructures and Photoluminescence
- Electrocatalysts for Energy Conversion
- Electrophoretic Deposition in Materials Science
- Clay minerals and soil interactions
- Luminescence and Fluorescent Materials
- High Entropy Alloys Studies
- Nanoparticle-Based Drug Delivery
- High-Temperature Coating Behaviors
- Magnetic properties of thin films
Institut Jean Lamour
2016-2025
Université de Lorraine
2016-2025
Centre National de la Recherche Scientifique
2015-2024
Jožef Stefan Institute
2023-2024
ITMO University
2019-2023
Institut national de recherche en informatique et en automatique
2023
École Nationale Supérieure des Mines de Nancy
2023
Laboratoire Lorrain de Recherche en Informatique et ses Applications
2023
Institute of Information Technologies
2019
The Open University
2015-2017
Short duration (∼1 s) PEO treatments have been applied to aluminium alloy samples on which coatings of thickness ∼100 μm had previously created. This was done using the small area electrical monitoring system developed in Gordon Laboratory Cambridge. Voltage supply frequencies 50 Hz and 2.5 kHz were employed. Fairly high resolution SEM micrographs taken, covering whole surface (ie over a circular diameter about 0.9 mm). both before after 1 s treatments. X-ray tomographic data also obtained...
Information is presented from high speed video imaging of the free surface coatings being grown on aluminium substrates by PEO processing. The exposure time during image capture ranged down to 5.5 μs, while linear spatial resolution images upwards about 12 μm. area viewed was 2.4 mm2, which taken be representative substrate as a whole (~ 129 mm2). processing carried out at 50 Hz AC. periods over sequences were captured 100 ms, covering several cycles variation applied potential. This...
This paper demonstrates the possibility of producing a lamellar ceramic nanocomposite at top-most surface oxide coatings grown with Plasma Electrolytic Oxidation process (PEO). PEO was conducted on aluminium in silicate-rich electrolyte under so-called "soft" regime. Nanoscale characterisation showed that transition from "arcs" to regime concomitant gradual formation 1:1 mullite/alumina (≈120 nm thick) filled cavity "pancake" structure. Combined plasma diagnostic techniques, three-step...
Abstract Data storage, processing, and communications are the backbone of digital world focus innovation efforts microelectronics industry. Recent raw material shortages, however, have revealed danger sourcing for At a time significant increase in demand data storage systems, it is urgent to consider sustainability resources used devices. By diluting inorganic elements an organic matrix, metal–organic frameworks (MOFs) substantial interest sustainable technologies. Moreover, they shown great...
We demonstrate herein an all-optical switch based on stimuli-responsive and photochromic-free metal-organic framework (HKUST-1). Ultrafast near-infrared laser pulses stimulate a reversible 0.4 eV blue shift of the absorption band with up to 200 s-1 rate due dehydration concomitant shrinking structure-forming [Cu2 C4 O8 ] cages HKUST-1. Such light-induced switching enables remote modulation intensities photoluminescence single crystals HKUST-1 as well visible radiation passing through crystal...
This focused review aims to reveal and illustrate some unique features of processes triggered by high-density energy applied liquids gas-liquid interfaces highlight a wide spectrum their technological applications capable producing various advantageous effects, ranging from nanosynthesis biological medical applications. Plasma, electric discharges, laser, ultrasound power effects were selected as representative examples liquid interactions, yet the available possibilities are not limited...
A Gd,Y rare-earth containing magnesium alloy (content in weight %, 10 Gd, 3 Y, 0.4 Zr and Mg as balance) is PEO processed for three different metallurgical states: (i) as-extruded, (ii) T4 solution (2 h at 500 °C) (iii) T6 peak-aged precipitation °C followed by 14 225 °C). The thickest coating combined with the lowest porosity achieved softest solid treated substrate resulting development of a harder oxide coating. presence Mg(GdY)-like precipitates precipitating condition correlated...
Synthetic organic and inorganic carriers often have limitations associated with problematic targeting ability or non-optimized pharmacokinetics, and, therefore, they restricted therapeutic potential. Natural drug (e.g. mesenchymal stem cells, MSCs) are able to migrate towards the tumor site penetrate cancerous cells. These biomimetic features make MSCs an attractive delivery platform that allows achieving maximal efficiency minimal toxic side effects. A combination of exhibiting a homing...
Metal-organic frameworks (MOFs) have been recently explored as crystalline solids for conversion into amorphous phases demonstrating non-specific mechanical, catalytic, and optical properties. The real-time control of such structural transformations their outcomes still remain a challenge. Here, we use in situ high-resolution transmission electron microscopy with 0.01 s time resolution to explore non-thermal (electron induced) amorphization MOF single crystal, followed by transformation an...
Controlling microdischarges in plasma electrolytic oxidation is of great importance order to optimize coating quality. The present study highlights the relationship between polarity at which breakdown occurs and electrolyte pH as compared with isoelectric point (IEP). It found that working a higher than IEP grown oxide prevents buildup detrimental cathodic discharges. addition phosphates results shift lower value therefore promotes anodic discharges expense ones.
We have developed a novel nanophotonic design representing plasmonic hybrid Au–Si nanosponge structure. The obtained results provide an understanding of the internal structure and physics this nanosponge.
Abstract All‐dielectric nanophotonics becomes a versatile tool for various optical applications, including nanothermometry and heating. Its general concept includes excitation of Mie resonances in nonplasmonic nanoparticles. However, the potential resonant dielectric nanoparticles drug delivery applications still has not been fully realized. Here, optically iron oxide (α‐Fe 2 O 3 NPs) are employed remote rupture microcontainers used as platform. It is theoretically experimentally...
Abstract The conversion of metal–organic frameworks (MOFs) into derivatives with a well‐defined shape and composition is considered reliable way to produce efficient catalysts energy capacitors at the nanometer scale. Yet, approaches based on conventional melting MOFs provide such as amorphous carbon, metal oxides, or metallic nanoclusters an appropriate morphology. Here ultrafast utilized by femtosecond laser pulses new generation complex morphology enhanced nonlinear optical response. It...
Abstract Luminescent security labels are effective platforms for protection of consumer goods from counterfeiting. However, the lifetimes such approaches limited due to narrow‐band photoluminescent features label elements, which can be used technology disclosure. In this paper, a novel concept application non‐linear white‐light luminescence hybrid metal–semiconductor structures fabricated by direct femtosecond laser writing creation physically unclonable is proposed. A close connection...
<title>Abstract</title> We explore how rural communities contributed to the foundation of Egyptian society through their beliefs. The study cemetery Adaima and its 504 funerary structures in Upper Egypt (3300–2700 BCE) reveals progressive ritual variability from First Third Dynasty. By Dynasty, a correspondence emerges between heliacal rising Sirius, summer solstice, Nile’s inundation, marking pivotal shift religious practices. central authority used this celestial conjunction transform...
Plasma electrolytic oxidation (PEO) processing of EV31 magnesium alloy has been carried out in fluoride containing electrolyte under bipolar pulse current regime. Unusual PEO cathodic micro-discharges have observed and investigated. It is shown that the exhibit a collective intermittent behavior, which discussed terms charge accumulations at layer/electrolyte layer/metal interfaces. Optical emission spectroscopy used to determine electron density (typ. 1015 cm−3) temperature 7500 K) while...
To meet the challenge of growing high-performance oxide coatings rapidly, plasma electrolytic oxidation (PEO) relies on control size and duration anodic microdischarges. Counterintuitively, this is done by adding a cathodic current, which has raised questions concerning influence electrical parameters, possibility $c\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}h\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}d\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}c$...