A5078987367- Metal and Thin Film Mechanics
- Nonlinear Optical Materials Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Diamond and Carbon-based Materials Research
- Laser-Plasma Interactions and Diagnostics
- Electromagnetic Launch and Propulsion Technology
- Advanced ceramic materials synthesis
- Force Microscopy Techniques and Applications
- Occupational Health and Safety in Workplaces
- Pulsed Power Technology Applications
- Laser-Ablation Synthesis of Nanoparticles
- Plasmonic and Surface Plasmon Research
- Advanced Surface Polishing Techniques
- Graphene and Nanomaterials Applications
- Ion-surface interactions and analysis
- Advanced materials and composites
- Graphene research and applications
- Aluminum Alloys Composites Properties
- Corrosion Behavior and Inhibition
- Wood Treatment and Properties
- Optical Polarization and Ellipsometry
- Archaeological and Geological Studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Business, Innovation, and Economy
- Magnesium Alloys: Properties and Applications
Centro de Investigación en Materiales Avanzados
2014-2024
University of Guayaquil
2024
Los Alamos National Laboratory
2002-2012
Instituto Politécnico Nacional
2006-2010
Center for Research and Advanced Studies of the National Polytechnic Institute
2006-2010
Because violins are traditionally hand-crafted using wood, each one is unique. This makes the design of repeatable experiments studying some aspects its dynamic behavior unfeasible. To tackle this problem, an adjustable finite element (FE) model a violin soundbox geometry and "Titian" Stradivari was developed in paper. The parametric, so material properties can be varied for before/after comparisons both frequency time domains. Systematic simulations revealed that f-holes set lower top, as...
A procedure to develop a true geometric finite element (FE) model of Berkovich indenter using fused silica as reference material is proposed. 2D and 3D models the tip were evaluated based on delimiting factors such geometry, elastic modulus, yield stress hardening compared with experimental results. The geometry paying special attention end was determined by non-linear regression indentation data at small depths equation sphere, image analysis AFM micrographs. bluntness described so-called...
We use two different synthesis approaches for the preparation of TiO(2) films in order to study their resulting third optical nonlinearity, and its modification by inclusion Au nanoparticles one samples. An ultrasonic spray pyrolysis method was used preparing a film which we found two-photon absorption as dominant nonlinear effect 532 nm 26 ps pulses; purely electronic nonlinearity at 830 80 fs pulses. A strong Kerr inhibition can be obtained first sample if embedded second prepared sol-gel...
The cordierite is one of the most important phases within MgO-Al2O3-SiO2 (MAS) system. In this study, crystallization and microstructure was analyzed. Four samples were prepared, which subjected to a thermal treatment at temperature 1200 °C with permanence time 2 h. selected depending on critical working temperature, specific applications such as coatings glass ceramic materials, according literature review. Characterization performed by analysis, X-ray diffraction, scanning electron...
Barium titanate (BaTiO3) single crystal with a tetragonal phase was characterized by nanoindentation. Elastic and elastic-plastic deformation regimes were obtained. The main objective the evaluation of anisotropic behavior related to mechanical properties associated cross-section ferroelectrica- andc-domains (In-plane out-of-plane) in (001) configuration domains. This evaluated along line perpendicular between domains, which demonstrated that BaTiO3single depend on distance from due effect...
A chaotic circuit allows us to identify with a high sensitivity the optical absorption associated highly transparent sample Au nanoparticles embedded in TiO2 thin film prepared by sol–gel method. The measurements are based on comparison of correlation between controlled irradiance that propagates through different zones sample. Nanosecond nonlinear were obtained monitoring transmittance and amplitude modification for vectorial components electric fields two-wave mixing interaction. In...
Experimental and numerical results about the propagation of optical signals in a bidirectional two-wave mixing system with Au nanocomposites carbon nanotubes are presented. nanoparticles embedded TiO2 thin solid film were prepared by sol–gel processing route; while obtained thermal decomposition approach. A conformed was put on top for nonlinear measurements. experiment conducted to distinguish direction probe-beam through exploration an induced birefringence two-photon absorption. The...
Thermo-optic and electrostrictive contributions to the nonlinear refractive index were observed in a titanium dioxide thin film with embedded gold nanoparticles. A sol–gel method was employed for preparing solid samples. The nanosecond optical properties Young’s modulus parameter changed by shifting absorption band associated localized surface plasmon of resonance nanoparticles platinum. third order phenomena exhibited sample induced second harmonic Nd-YAG laser 532 nm wavelength;...
Abstract The enhancement of fracture toughness exhibited by silica glass (SG) remains a challenge for wide variety technology applications, particularly without implying significant changes in the structure. present work shows that embedded platinum nanoparticles (PtNPs) can significantly improve mechanical performance (PtNPs/SG). PtNPs were implanted into high‐purity SG substrate with 3MV Tandem accelerator Pelletron and thermally annealed at 600°C. Rutherford backscattering spectroscopy...
Photoconduction and nonlinear optical refraction effects exhibited by an array of separated Au microchannels are reported. The samples were constituted thin solid films containing nanoparticles prepared evaporation method. photoconductivity the sample was measured with continuous illumination at 532 nm wavelength 1 W average power. A vectorial two-wave interaction allowed us to explore Kerr effect ns pulse duration. Z-scan experiments performed in a comparative film pointed out saturated...