A5063827649- Ion-surface interactions and analysis
- Copper-based nanomaterials and applications
- Atomic and Molecular Physics
- Electron and X-Ray Spectroscopy Techniques
- Carbon Nanotubes in Composites
- ZnO doping and properties
- X-ray Spectroscopy and Fluorescence Analysis
- Iron oxide chemistry and applications
- Diamond and Carbon-based Materials Research
- Advanced Chemical Physics Studies
- Graphene research and applications
- Nuclear Physics and Applications
- Anodic Oxide Films and Nanostructures
- Semiconductor materials and devices
- Hydrogen Storage and Materials
- Ga2O3 and related materials
- Nonmelanoma Skin Cancer Studies
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Energy Technologies and Civil Engineering Innovations
- Advanced Photocatalysis Techniques
- Concrete Corrosion and Durability
- Molecular Junctions and Nanostructures
- Spectroscopy and Quantum Chemical Studies
- Advancements in Photolithography Techniques
- Advanced Electron Microscopy Techniques and Applications
Federico Santa María Technical University
2006-2019
Bariloche Atomic Centre
2013-2018
Balseiro Institute
2013-2018
University of Valparaíso
2015-2018
Johannes Kepler University of Linz
2017-2018
Universidad Técnica Federico Santa María
2014-2017
Pontificia Universidad Católica de Valparaíso
2005
We present a detailed study of the energy losses hydrogen ions that are scattered off an Ag(110) single-crystal surface for primary energies between 1 and 4 keV. performed measurements grazing angles as function crystal azimuthal orientation, which show large differences in losses. Experimental results discussed by means trajectory calculations protons under grazing-incidence conditions on surface. Using nonlinear models stopping power, ab initio structure electronic density, semiclassical...
We have investigated experimentally and by computer simulations the energy-loss distributions of low-energy ($E<10$ keV) protons deuterons transmitted through polycrystalline palladium thin films. In contrast to previous experiments on various transition metals we find that stopping power Pd is proportional ion velocity. Data are coincident within experimental uncertainties, showing absence an isotopic effect in this energy range. The results were analyzed compared with Monte Carlo...
The electronic stopping cross section (SCS) of Ni for slow H+, H2+, D+ and D2+ ions has been investigated different types targets in two complementary experimental geometries, i.e., transmission backscattering. To warrant sample purity, both a high purity nickel sheet nanometer layers were prepared in-situ under ultra-high-vacuum conditions. In an alternative approach, ultra-thin samples ex-situ as self-supporting foils films on polished substrate (silicon). Identical SCS results are...
Few-layer graphene was grown by Chemical Vapor Deposition on a CuO thin film pre-deposited sputtering SiO2/Si substrates using acetylene as the carbon source.After evaporation of metal, lies directly in contact with SiO2 dielectric layer.Raman spectroscopy used to confirm presence single and/or few-layers graphene.This procedure does not requiring any post processing transfer onto substrate or use ultra-high vacuum during synthesis.
We present a description of the effect surface roughness on energy straggling associated to loss distributions protons transmitted through self supported metallic thin foil. For this purpose we prepared polycrystalline gold films using standard sputtering method with different deposition rates. The statistics height distribution induced in these were determined Atomic Force Microscopy. measured allowed us quantify ion samples for parameters and as function incident energy.
This manuscript describes briefly the process used to build an ordered porous array in anodic aluminum oxide (AAO) membrane, filled with multiwall carbon nanotubes (MWCNTs). The MWCNTs were grown directly inside membrane through chemical vapor deposition (CVD). role of CNTs is provide narrow metal electrodes contact a dielectric surface barrier, hence, forming capacitor. procedure allows construction 1010 parallel nano-spherical capacitors/cm2. A central part this contribution use physical...
The energy loss of hydrogen and helium ions in the low range (<10keV/u) single crystal gold targets is investigated experimentally. We found that stopping power for shows a deviation from proportionality with ion velocity predicted theoretically. This behavior has been also observed protons previous experiments. Additionally, we small same magnitude as velocity. last finding agreement early theoretical prediction interacting electron densities, beyond metallic frame free gas model density...
The interaction of the ethyl xanthate (EX) anion with a copper electrode in borate buffer solution, pH 9.2, has been investigated by cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), impedance spectroscopy (EIS), and measurements contact angle (CA) under controlled potential. results obtained allow establishing that, potential range from -0.80 -0.60 V, two parallel reactions were characterized. These electroadsorption hydrogen evolution reaction (HER). This last...
The CuO is an important semiconductor material because this presents a narrow bandgap value ( ~ 1.2 – 1.7 eV), p-type conductivity, low toxicity and abundance in nature. From comparison of the photoelectrochemical behavior between others semiconductor, it concluded that oxide sensible to visible radiation whereas others, more widely used such as; TiO 2 , ZnO, which absorb UV region. Despite above, copper has diffusion rate charge carriers. Therefore, new synthesis routes leading...
The quasi-unidimensional (Q1D) nanostructured semiconductors materials have certain advantages, such as, a higher surface area/volume ratio [1-3], better crystallinity and present decrease of the recombination process, due to less distance that photogenerated charge carriers must travel attain interface [4]. Thus, these nanomaterials are being applied in photovoltaic photoelectrochemical devices. One cases is manufacture nanostructures for energy storage production fuels with high relation...