A5054579630- Copper-based nanomaterials and applications
- nanoparticles nucleation surface interactions
- Chalcogenide Semiconductor Thin Films
- Electrocatalysts for Energy Conversion
- Quantum Dots Synthesis And Properties
- Catalytic Processes in Materials Science
- ZnO doping and properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Ion-surface interactions and analysis
- Ga2O3 and related materials
- Supercapacitor Materials and Fabrication
- Laser-Ablation Synthesis of Nanoparticles
- Organic Electronics and Photovoltaics
- Plasmonic and Surface Plasmon Research
- Neural Networks and Applications
- Plant and soil sciences
- Organizational Management and Innovation
- Electrochemical Analysis and Applications
- Photonic Crystals and Applications
- Advanced Materials Characterization Techniques
- Scarabaeidae Beetle Taxonomy and Biogeography
- Occupational Health and Safety in Workplaces
- Air Traffic Management and Optimization
- Advanced Memory and Neural Computing
- Advanced Physical and Chemical Molecular Interactions
National Polytechnic School
2024
Universidad de Los Andes
2024
Universitat Politècnica de Catalunya
2023
Institut de Robòtica i Informàtica Industrial
2023
Universidad UTE
2023
Groupe de Recherches sur l'Energétique des Milieux Ionisés
2017-2021
Université d'Orléans
2019-2021
Centre National de la Recherche Scientifique
2013-2021
Institut Jean Lamour
2013-2016
Université de Lorraine
2013-2016
Platinum nanoparticles (Pt NPs) were synthesized in glycerol as a liquid substrate via magnetron sputtering method at different argon pressures (1.0, 4.0, and 9.0 Pa). Then, Pt NPs deposited onto Vulcan XC-72 powder to form carbon-supported catalysts. Molecular dynamics (MD) simulations carried out using parameters mimicking the deposition conditions of plasma experiments determine key for growth understand mechanism atomic scale. MD showed that depended on kinetic energy atoms arriving...
Nanocomposite films consisting of gold nanoparticles embedded in zinc oxide (ZnO-Au) have been synthesized with different loadings by reactive magnetron sputtering at near-room temperature followed ex situ annealing air up to 300 °C. Using X-ray diffraction and high resolution transmission microscopy it is shown that during deposition substitutes ZnO as isolated atoms still exhibiting the structure ZnO. Both situations degrade crystalline quality matrix, but thermal cures from triggers...
A new effective medium theory is introduced to describe the optical properties of a two-dimensional array metallic nanoislands. This model which takes into account both nanoisland orientation and their shape distribution successfully used interpret ellipsometric measurements performed on gold nanoislands sputtered silicon substrate. By coupling ellipsometry atomic force microscopy measurements, we show that growth mechanism involves Volmer–Weber mode. The anisotropy uniaxial films was...
Single-domain epitaxial ZnO films are grown near-room temperature (below 40 °C) on (0 0 1)-sapphire using reactive magnetron sputtering of a zinc target in the transition between metallic and compound regimes. As oxygen content gas mixture is increased, in-plane six-fold symmetry hexagonal wurtzite ZnO, probed by φ-scan measurements, develops. Transmission electron microscopy analyses confirm that single-domain layers formed. This accompanied incorporation interstitial defects associated...
ZnS:Cu films were synthetized by co-sputtering. A Cu content higher than 10.6 at% lead to changes as the shrinkage of cell and development a p-type behavior. These results are explained substitution Zn<sup>+2</sup> ions Cu<sup>+</sup> ones.
Abstract We review our recent findings that reactive magnetron sputtering can be operated without thermal assistance to produce epitaxial ZnO films and highly conductive transparent aluminum‐doped (AZO) on large surface area. The growth of requires working in direct current (DC) mode at oxygen partial pressure but high power impulse (HiPIMS) is preferred optimize the electrical optical properties AZO areas. results are interpreted by ability DC easily oxidize target HiPIMS cleans returns it...
Recently, the compound semiconductor Cu 3 BiS has been demonstrated to have a band gap of ~1.4 eV, well suited for photovoltaic energy harvesting. The preparation polycrystalline thin films was successfully realized and now junction formation n-type window needs be developed. We present an investigation absorber layer with CdS, ZnS In 2 S buffer layers. Kelvin probe force microscopy shows granular structure layers small grains 20–100 nm, considerably smaller work-function distribution...
Abstract Palladium clusters are grown using a gas aggregation source coupled to magnetron sputtering with oxygen as reactive gas. Clusters mean size between 2.6 and 3.3 nm obtained. Oxygen enhances the deposition rate by factor 3 (from 4 11 mg/h cm −2 ) at expense of formation larger modification cluster composition. An increase flow induces transition from Pd PdO, this is followed 2D structural defects in crystals displayed grazing incidence X‐ray diffraction high resolution transmission...
Chronic neuroinflammation is characterized by increased blood-brain barrier (BBB) permeability, leading to molecular changes in the central nervous system that can be explored with biomarkers of active neuroinflammatory processes. Magnetic resonance imaging (MRI) has contributed detecting lesions and permeability BBB. Ultra-small superparamagnetic particles iron oxide (USPIO) are used as contrast agents improve MRI observations. Therefore, we validate interaction peptide-88 laminin,...
The rise in UAV capabilities has significantly boosted aerial monitoring activities recent years. This surge un-manned vehicles increased attention towards tasks vital areas, such as urban spaces for security, surveillance or Internet of the Things applications. In this sense, we propose an open-source software-in-the-loop approach that integrates complete navigation experience, accounting potential wind-related effects, and providing realistic 3D modeling scenarios encompassing open city...
Event cameras are bioinspired sensors with reaction times in the order of microseconds. This property makes them appealing for use highly-dynamic computer vision applications. In this work,we explore limits sensing technology and present an ultra-fast tracking algorithm able to estimate six-degree-of-freedom motion dynamics over 25.8 g, at a throughput 10 kHz,processing million events per second. Our method is capable either camera or object front it, using error-state Kalman filter...
This study presents new methods for integrating event data and IMU readings to achieve ultra-fast camera pose estimates. The conventional predict-with-IMU-correct-with-vision approach is no longer optimal because events can be generated much more rapidly than data. Therefore, two novel fusion schemes are proposed, which combine constant velocity acceleration prediction models with (10 kHz) event-based updates slower 1 kHz updates. first scheme uses as instantaneous measurements of angular...
Platinum (Pt), platinum-bismuth (PtBi), platinum-copper (PtCu) and platinum-bismuth-copper (PtCuBi) clusters were grown in a gas aggregation source (GAS) equipped with three in-plane plasma magnetrons located single region of the zone. The X-ray diffraction results have shown that PtCu form alloys as decrease lattice parameter occurs when Cu atomic content increases. PtBi do not alloys, but presence secondary Bi oxide phases was detected. Scanning transmission electron microscope mapping...
La búsqueda de fuentes energía alternativas a los combustibles fósiles ha permitido el desarrollo y uso diferentes tecnologías basadas en la solar. Las celdas solares compuestos organicos ofrecen grandes ventajas aspectos económicos, ambientales tecnológicos es por eso que evolución tenido desde sus comienzos su paso hacia producción mediana escala lo perspectivas crecimiento son muy alentadoras.
<span style="font-family: LMRoman9-Regular; font-size: xx-small;"><span xx-small;"><p>Películas delgadas de ZnS fueron sintetizadas por el método CBD (Chemical bath deposition) usando una solución constituida tiourea y acetato zinc como fuentes S Zn citrato amonio agente acomplejante. Estas crecidas sobre sustratos vidrio soda lime recubiertos con películas Cu2SnZnS4 (CZTS). A través múltiples ensayos realizados variando los principales parámetros síntesis se encontraron...
The Ecuadorian territory is divided into four natural regions: the coastal lowlands, Andean highlands, Amazon basin and Galapagos Islands. Each of these regions has its own ecosystems specific vegetation. purpose this work to compile an updated catalog Scarabaeinae (Coleoptera: Scarabaeidae) Ecuador that includes distributional data several nomenclatural acts. Data was compiled from 26 scientific collections, with examination 13550 scarabaeines; additionally 368 bibliographic references were...