A5069195412- Gas Sensing Nanomaterials and Sensors
- Advanced Radiotherapy Techniques
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Sensors
- ZnO doping and properties
- Catalytic Processes in Materials Science
- Historical Studies and Socio-cultural Analysis
- European Political History Analysis
- Medical Imaging Techniques and Applications
- Spectroscopy and Laser Applications
- Transition Metal Oxide Nanomaterials
- Lung Cancer Diagnosis and Treatment
- Management of metastatic bone disease
- Electrochemical sensors and biosensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical Analysis and Applications
- Copper-based nanomaterials and applications
- nanoparticles nucleation surface interactions
- Advances in Oncology and Radiotherapy
- Nanomaterials for catalytic reactions
- Air Quality Monitoring and Forecasting
- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Advanced Photocatalysis Techniques
- Advanced MRI Techniques and Applications
Laboratoire de Chimie de Coordination
2015-2024
Centre National de la Recherche Scientifique
2012-2024
Laboratoire de Physique et Chimie des Nano-Objets
2021-2024
Université Toulouse III - Paul Sabatier
2012-2024
Université de Toulouse
2010-2024
Sumatera Institute of Technology
2024
Institut Paoli-Calmettes
2014-2023
Institut Pprime
2011-2023
Institut National des Sciences Appliquées de Toulouse
2022-2023
Aix-Marseille Université
2018-2019
Nanostructures are considered as chemical systems of high potential owing to their unusual properties at the interface those molecular species and bulk metals. Consequently, they promising candidates for application in different domains such catalysis, magnetism, medicine, opto-electronics or sensors. The control characteristics nanostructures is a fundamental prerequisite if one envisages exploring physical since vary dramatically with size, shape surface state. Thus, development efficient...
The resistance of a metal oxide gas sensor varies when the is exposed to oxidizing or reducing gases, thus giving rise measurable signal. most important type with respect practical application uses SnO2 as sensitive layer material. In this paper, new procedure for preparing nanoparticles suitable sensing applications—combining thermolysis an organometallic precursor hydration—is described. Such nanostructures are desirable since size reduction individual grains expected increase sensitivity.
Nanocomposite core-shell particles that consist of a Sn0 core surrounded by thin layer tin oxides have been prepared thermolysis [(Sn(NMe2)2)2] in anisole contains small, controlled amounts water. The were characterized means electronic microscopies (TEM, HRTEM, SEM), X-ray diffraction (XRD) studies, photoelectron spectroscopy (XPS), and Mossbauer spectroscopy. TEM micrographs show spherical nanoparticles, the size distribution which depends on initial experimental conditions temperature,...
Low-polydispersity copper nanoparticles (NPs) are prepared through hydrogenolysis of various organometallic precursors in an organic medium at moderate temperature. The effects the precursor composition and nature additional surfactants on structure stability NPs characterized by TEM UV-Vis analysis. improved air originating from amidinate stabilized alkylamine compound (hexadecylamine) is evidenced compared with effect a long chain carboxylic acid (oleic acid).
Single-crystalline FeCo nanoparticles with tunable size and shape were prepared by co-decomposing two metal-amide precursors under mild conditions. The nature of the ligands introduced in this organometallic synthesis drastically affects reactivity and, thus, chemical distribution within nanoparticles. presence B2 short-range order was evidenced HDAHCl ligands, combining 57Fe Mössbauer, zero-field 59Co ferromagnetic nuclear resonance (FNR), X-ray diffraction studies. This is first time that...
We compared two intensity-modulated radiotherapy techniques for left-sided breast treatment, involving lymph node irradiation including the internal mammary chain. Inverse planned arc-therapy (VMAT) was with a forward-planned multi-segment technique mono-isocenter (MONOISO). Ten files were per technique, delivering 50-Gy dose to and 46.95 Gy nodes, within 25 fractions. Comparative endpoints planning target volume (PTV) coverage, surrounding structures, treatment delivery time. PTV...
Low size dispersity silver nanoparticles (ca. 6 nm) have been synthesized by the hydrogenolysis of amidinate in presence hexadecylamine. Combining NMR techniques with SERS and DFT modeling, it is possible to observe an original stabilization mechanism. Amidine moiety strongly coordinated Ag0 surface whereas HDA ligand necessary prevent agglomeration, although only weakly interacting surface.
A general bottom-up modeling strategy for gas sensor response to CO, O(2), H(2)O, and related mixtures exposure is demonstrated. In a first stage, we present principles calculations that aimed at giving an unprecedented review of basic chemical mechanisms taking place the surface. Then, simulations operating are performed via mesoscopic model derived from calculated density functional theory data into set differential equations. Significant presence catalytic oxidation reaction highlighted.
Abstract Conditions for the elaboration of nanostructured varistors by spark plasma sintering (SPS) are investigated, using 8‐nm zinc oxide nanoparticles synthesized following an organometallic approach. A binary system constituted and bismuth is used this purpose. It at room temperature in organic solution through hydrolysis dicyclohexylzinc acetate precursors. Sintering material performed SPS various temperatures dwell times. The determination microstructure chemical composition...
Abstract Purpose This study evaluates the benefit of a virtual bolus method for volumetric modulated arc therapy (VMAT) plan optimization to compensate breast modifications that may occur during treatment. Methods Ten files were replanned with VMAT giving 50 Gy and 47 nodes within 25 fractions. The planning process used first optimization, then monitors units reoptimized without bolus, after fixing segments shapes. Structures treatment exported on second scanner (CT) performed as consequence...
A microactuator consisting of an inflatable elastic membrane based on the decomposition a small mass energetic material deposited silicon microstructured platform is presented for disposable lab-on-a-chip applications. The energetic-material-based actuator characterized by its size (<0.25 mm2 × 100 µm), bio-compatibility and capability generating sufficient overpressures (>10 kPa) under low electrical power (<100 mW) to eject few nanolitres fluid. This device has been fabricated using MEMS...
Abstract The hydrogenolysis of [Cu 2 {( i PrN) (CCH 3 )} ] in the presence hexadecylamine (HDA) or tetradecylphosphonic acid (TDPA) toluene leads to 6–9 nm copper nanocrystals. Solution NMR spectroscopy has been used describe nanoparticle surface chemistry during dynamic phenomenon air oxidation. ligands are organized as multilayered shells around nanoparticles. shell is controlled by both their intermolecular interactions and bonding strength on Under ambient atmosphere, oxidation rate...
Amine ligands are expected to drive the organization of metallic centers as well chemical reactivity silver clusters early growing during very first steps synthesis nanoparticles via an organometallic route. Density functional theory (DFT) computational studies have been performed characterize structure, atomic charge distribution, and planar two-dimensional (2D)/three-dimensional (3D) relative stability small-size (Agn, 2 ≤ n 7), with or without ethylamine (EA) ligand coordinated Ag...
Magnetic Resonance guided Radiotherapy (MRgRT) still needs the acquisition of Computed Tomography (CT) images and co-registration between CT Imaging (MRI). The generation synthetic (sCT) from MR data can overcome this limitation. In study we aim to propose a Deep Learning (DL) based approach for sCT image abdominal using low field images.CT were collected 76 patients treated on sites. U-Net conditional Generative Adversarial Network (cGAN) architectures used generate images. Additionally,...
Microbial contamination of the surface building materials and subsequent release microbial particles into air can significantly affect indoor quality. Avoiding development or, at least, reducing quantity microorganisms growing on is a key point to reduce health risks for occupiers. In that context, antimicrobial activity TiO2, ZnO Au/ZnO was assessed by measuring log reductions Escherichia coli Aspergillus niger populations both in dark under light intensity close real-life conditions. The...
We present a facile, room temperature and “fully liquid” method to specifically produce either copper nanoparticles or thin conductive films on silicon substrates by using dedicated reduction process of mesitylcopper H2 an aminoborane.
A metal-organic approach has been employed for the preparation of anisotropic CuO nanoparticles. These nanostructures have characterized by transmission and high resolution electron microscopy, field-emission scanning X-ray powder diffraction, Fourier transform infrared spectroscopy photoelectron spectroscopy. The nanoparticles deposited as gas-sensitive layers on miniaturized silicon devices. At an operating temperature 210 °C, sensors present optimum response toward carbon monoxide...