A5064488665- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Magnetic Properties and Synthesis of Ferrites
- ZnO doping and properties
- Catalytic Processes in Materials Science
- Luminescence Properties of Advanced Materials
- Theoretical and Computational Physics
- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Magneto-Optical Properties and Applications
- Advanced Photocatalysis Techniques
- Characterization and Applications of Magnetic Nanoparticles
- Copper-based nanomaterials and applications
- Shape Memory Alloy Transformations
- Nanoparticle-Based Drug Delivery
- Magnetic Properties and Applications
- Advanced Thermoelectric Materials and Devices
- Advanced Sensor and Energy Harvesting Materials
- Advancements in Solid Oxide Fuel Cells
- Clay minerals and soil interactions
- Analytical Chemistry and Sensors
Pedagogical and Technological University of Colombia
2016-2025
Universidade Federal do ABC
2022
Material (Belgium)
2021
Material Physics Center
2020
University of Pamplona
2017
Universidade Federal de Pernambuco
2017
Universidad Nacional de Colombia
2007-2014
Universidad Nacional Autónoma de México
2007
Force Sensing Resistors (FSRs) are manufactured by sandwiching a Conductive Polymer Composite (CPC) between metal electrodes. The piezoresistive property of FSRs has been exploited to perform stress and strain measurements, but the rheological polymers undermined repeatability measurements causing creep in electrical resistance FSRs. With aim understanding phenomenon, drift response thirty two specimens was studied using statistical approach. Similarly, theoretical model for developed...
Conductive polymer composites are manufactured by randomly dispersing conductive particles along an insulating matrix. Several authors have attempted to model the piezoresistive response of composites. However, all proposed models rely upon experimental measurements electrical resistance at rest state. Similarly, available in literature assume a voltage-independent and stress-independent area for tunneling conduction. With aim developing validating more comprehensive model, test bench...
Copper oxide (CuO) has been broadly used in different technological and biological applications. However, based on the literature review, there are few reports describing synthesis of tungsten doped copper its applications, although CuO W (tungsten) nanomaterials have reportedly already synthesized. In this study we synthesized novel CuO/W (at.1%, 2% 4%) nanoparticles explored their content-dependent bactericide activity. order to obtain materials, was a co-precipitation method which is low...
Abstract Current cancer treatments are not selective in delivering drugs to cells, affecting healthy tissues and especially rapidly dividing cells. This work describes the development of superparamagnetic nanoparticles for drug delivery through green synthesis, mediated by Musa paradisiaca peel extract as a stabilizing reducing agent. The nanoparticles’ structural, morphological, magnetic chemical properties were evaluated. XRDs showed cubic crystal structure with space group Fd3m (No. 227),...
The coating of polymeric substrate polyetheretherketone (PEEK) with silver nanoparticles (AgNPs) was carried out by a wet chemical route at room temperature. process developed from the Tollens reagent and D-glucose as reducing agent. resulting composite exhibited antimicrobial activity. PEEK films were coated single layer two layers in various concentrations. crystallographic properties polymer analyzed X-ray diffraction (XRD). Fourier transform infrared spectra (FTIR) show interaction...
In the present work we report synthesis of La1−xMgxMnO3 (with x = 0.10, 0.25, and 0.50) polycrystalline samples based on LaMnO3 (LMO) antiferromagnetic with low Neel temperature insulating behavior. Structure was analyzed by Rietveld fitting XRD patterns at room FullProf software, these show that (x crystallize in space group R-3c. Magnetic electrical measurements exhibits ferromagnetic semiconductor like A decreases TC is observed when doping value increases.
Polycrystalline samples of Sm<sub>2</sub>Bi<sub>2</sub>Fe<sub>4</sub>O<sub>12</sub>were produced by the standard solid state reaction method.
Abstract Degradation of pollutants in aqueous medium is high interest due to the impact on environment and human health, therefore, design study physico-chemical properties photocatalysts for water remediation are major significance. Among photocatalyst, those related surface electrical mechanism crucial photocatalyst´s performance. Here we report chemical morphological characteristics TiO 2 @zeolite photocatalyst by X-ray photoelectron spectroscopy (XPS) scanning electron microscopy (SEM)...
Abstract In this investigation, the effect of deformation on magnetic properties at low temperatures FeCr 18.2 Mn 18.9 –0.96C + N high interstitial steel was studied. Tensile tests were carried out room temperature and interrupted 10, 20, 30 pct deformation. Magnetic measurements performed through vibrating sample magnetometry (VSM) technique from 50 K to 370 K. Microstructural, morphological, crystalline structural analyses by means XRD SEM showed that material consisted a homogenous stable...
In this work the study of viscosity is presented for a magnetorheological fluid made from iron oxides micrometre, under an external magnetic field. The material was characterized by loops in vibrating sample magnetometer and its crystal structure X-ray diffraction. results show that saturation magnetization coercive field have dependence with powder size. has different which lattice parameters were determined Rietveld refinement. measured viscometer rotational symmetry without This result...
Force Sensing Resistors (FSRs) are low-cost alternatives to load cells for pressure and force sensing. Nonetheless, FSRs exhibit a comparative lower repeatability due their large hysteresis creep response. The operate on the basis of piezoresistive effect, but they have proven piezocapacitive effect too. A test bench has been arranged enable both: conductance (the inverse resistance) capacitance readings total 16 FSRs; measures using DC input signal, whereas is estimated an AC sourcing....
This paper reports the synthesis and characterization of a lanthanum–barium–copper oxide, based on LaBa 2Cu 3 O 7 system, using wet chemical route that enables combustion–polymerization citrate species, in order to generate materials with enhanced surface textural morphological properties for potential applications. The synthesized precursor form coordination complex was characterized by Fourier transform infrared spectroscopy (FTIR) analysis evaluate formation homogeneous soluble species as...