A5064015048- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Semiconductor materials and devices
- Advanced Photocatalysis Techniques
- Bone Tissue Engineering Materials
- Corrosion Behavior and Inhibition
- Gas Sensing Nanomaterials and Sensors
- Catalytic Processes in Materials Science
- High-pressure geophysics and materials
- ZnO doping and properties
- Dental materials and restorations
- TiO2 Photocatalysis and Solar Cells
- Advanced materials and composites
- Electronic and Structural Properties of Oxides
- Copper-based nanomaterials and applications
- Ga2O3 and related materials
- Electrochemical Analysis and Applications
- High-Temperature Coating Behaviors
- Magnesium Alloys: Properties and Applications
- Anodic Oxide Films and Nanostructures
- Polymer Surface Interaction Studies
- Nanoparticles: synthesis and applications
- Electrospun Nanofibers in Biomedical Applications
- Aluminum Alloys Composites Properties
- Periodontal Regeneration and Treatments
Universidad Nacional Autónoma de México
2015-2024
Universidad Autónoma de la Ciudad de México
2023
Instituto Nacional de Investigaciones Nucleares
2018-2022
Instituto de Investigaciones en Ciencia y Tecnología de Materiales
2005-2019
Cornell University
2016
Case Western Reserve University
2016
Instituto Politécnico Nacional
2012
Symetrix (United States)
2012
Color (United States)
2012
Argonne National Laboratory
2012
A general framework for the interpretation of infrared and Raman spectra amorphous carbon nitrides is presented. In first part this paper we examine spectra. The peaks around 1350 1550 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ found in spectrum nitride or hydrogenated hydrogen-free are shown to originate from large dynamic charge more delocalized \ensuremath{\pi} bonding which occurs ${\mathrm{sp}}^{2}$ bonded networks. IR absorption decreases strongly when becomes localized, as tetrahedral...
Grazing-angle x-ray reflectivity (XRR) is described as an efficient, nondestructive, parameter-free means to measure the mass density of various types amorphous carbon films down nanometer thickness range. It shown how XRR can also detect layering if it present in films, which case profile must be modeled derive density. The derived from valence electron via plasmon energy, measured by energy-loss spectroscopy (EELS). We formally define interband effective ${m}^{*},$ accounts for finite band...
Features in the Raman and infrared (IR) spectra of highly sp3 bonded hydrogenated amorphous carbon nitride films are assigned. The show three main features all found a-C itself, G D peaks at 1550 1350 cm−1, respectively, L peak near 700 cm−1. intensity ratio peaks, I(D)/I(G), is to scale as (band gap)−2, which confirms that nitrogen induces form sp2 graphitic clusters. mode with mode, supporting its identification an in-plane rotational sixfold rings A small feature 2200 cm−1 due C≡N modes...
Niobium coatings deposited by magnetron sputtering were evaluated as a possible surface modification for stainless steel (SS) substrates in biomedical implants. The Nb on 15 mm diameter having an average roughness of 2 mm. To evaluate the biocompatibility three different vitro tests, using human alveolar bone derived cells, performed: cellular adhesion, proliferation and viability. Stainless tissue culture plastic also studied, order to give comparative information. No toxic response was...
This paper highlights the inconvenience of sodium ions in Bi2S3 quantum dots (QDs) deposition procedure, on TiO2 surface, for conversion efficiency sensitized solar cells derived from these materials. Porous electrodes were with QDs obtained by successive ion layer adsorption and reaction (SILAR) technique, using aqueous solutions Bi(NO3)3 as cation precursor Na2S sulfide source. Independently, elemental sulfur vapor was used to replace solution synthesis procedure. The layers characterized...
Implant infections can cause severe problems from malfunctioning to dangerous sepsis affecting the health of patient. For many years, titanium has been most common material used on dental implants due their mechanical and biocompatibility properties. Recent studies suggest that amorphous carbon (a-C) films be possible candidates for coating implants, improving some important features like bone formation. In oral cavity, risk an implant infection is high multiple species are capable colonize...
The use of dyes to evaluate visible-light photocatalysts requires a proper determination the contribution from competing processes: adsorption, sensitization, photobleaching and degradation.