Alex Lopera

ORCID: 0000-0001-5491-6274
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About
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Research Areas
  • Pigment Synthesis and Properties
  • Bone Tissue Engineering Materials
  • Magnetic Properties and Synthesis of Ferrites
  • Nanomaterials for catalytic reactions
  • Iron oxide chemistry and applications
  • Additive Manufacturing and 3D Printing Technologies
  • Research on Leishmaniasis Studies
  • Advancements in Battery Materials
  • Dental materials and restorations
  • Transition Metal Oxide Nanomaterials
  • Dyeing and Modifying Textile Fibers
  • Cultural Heritage Materials Analysis
  • Dielectric properties of ceramics
  • Luminescence Properties of Advanced Materials
  • Minerals Flotation and Separation Techniques
  • Postharvest Quality and Shelf Life Management
  • Phytochemistry and Bioactivity Studies
  • Calcium Carbonate Crystallization and Inhibition
  • Bee Products Chemical Analysis
  • Medical and Biological Ozone Research
  • Synthesis and biological activity
  • Plant Physiology and Cultivation Studies
  • Arduino and IoT Applications
  • Chemical synthesis and pharmacological studies
  • Advanced materials and composites

Universidad Nacional de Colombia
2013-2024

Pascual Bravo Institution University
2019-2021

Universidade Estadual Paulista (Unesp)
2018-2019

The increase in critical bone diseases and defects the world's population increases need for substitutes to restore form function. Organic inorganic scaffolds with antibacterial properties could provide advantages regeneration. In this study, we obtained of polycaprolactone (PCL) charged calcium phosphates nanoparticles impregnated extracts Colombian plants as an alternative potential Calcium phosphate were via auto-combustion synthesis. incorporated into PCL a chemical dissolution-disperse...

10.1016/j.heliyon.2023.e13176 article EN cc-by-nc-nd Heliyon 2023-01-25

The avocado cv. Hass is one of the most dynamic fruits in world and particular significance tropical areas, where climate variability phenomena have a high impact on productivity sustainability. Nanotechnology-based tools could be an alternative to mitigate and/or adapt plants these phenomena. Our approach was based identifying changes temperature precipitation associated with areas Colombia proposing mitigation strategies use nanotechnology. This study had two objectives: (i) identify...

10.1016/j.heliyon.2023.e18658 article EN cc-by-nc-nd Heliyon 2023-07-28

Several diseases and injuries cause irreversible damage to bone tissues, which may require partial or total regeneration replacement. Tissue engineering suggests developing substitutes that contribute the repair process by using three-dimensional lattices (scaffolds) create functional tissues. Herein, scaffolds comprising polylactic acid wollastonite particles enriched with propolis extracts from Arauca region of Colombia were developed as gyroid triply periodic minimal surfaces fused...

10.3390/polym15122629 article EN Polymers 2023-06-09

This research presents the effect on color of green ceramic pigment CoCr2O4 when Co2+ was replaced by Mg2+. The objective is to reduce concentration cobalt in pigments, which considered an expensive and toxic raw material. pigments were synthesized solution combustion one-step. X-ray Diffraction (XRD) Fourier Transform Infrared Spectroscopy (FTIR) as-prepared powders showed that spinel structure obtained during reaction. microstructure observed Scanning Electron Microscopy (SEM) are porous...

10.1016/j.bsecv.2019.11.001 article ES cc-by-nc-nd Boletín de la Sociedad Española de Cerámica y Vidrio 2019-11-21

Titanium oxide (TiO2) is the most important semiconductor used in photocatalysis. For that reason, recent scientific studies have focused on improving absorbance of this material visible region. In paper, we report production nanopowders TiO2 doped with platinum via solution combustion synthesis method, using glycine as a fuel at concentrations 0.3, 0.6, 0.9, and 1.2% w/w Pt respect to (Pt / TiO2), order study influence dopant content spectrum The structure samples was characterized x-ray...

10.1088/0022-3727/49/20/205501 article EN Journal of Physics D Applied Physics 2016-04-15

Zn2TiO4 + Ag compounds were synthesized by the solution combustion path seeking to enhance their photocatalytic and photodynamic response in visible. X-ray diffraction tests confirmed formation of phase presence metallic silver. Field emission electron microscopy evidenced aggregates formed grains lower than 100nm. The diffuse reflectance allowed detect compound absorption visible region activation energy 2.8eV. evaluation properties was performed degradation methylene blue while biological...

10.1088/1742-6596/935/1/012013 article EN Journal of Physics Conference Series 2017-12-01

Biocompatible ceramic scaffolds offer a promising approach to address the challenges in bone reconstruction. Wollastonite, well-known for its exceptional biocompatibility, has attracted significant attention orthopedics and craniofacial fields. However, antimicrobial properties of wollastonite have contradictory findings, necessitating further research enhance antibacterial characteristics. This study aimed explore new improve vitro biological response terms activity cell proliferation by...

10.1016/j.heliyon.2023.e23955 article EN cc-by-nc-nd Heliyon 2023-12-19

In this research, inorganic pigment with spinel structure CoCr 2 O 4 was synthesized by the solution combustion synthesis using glycine as fuel in an one-step. The powders as-prepared after and then calcined at 700 °C during 6 hours, were characterized X-ray diffraction (XRD), both samples showed peaks corresponding to expected structure. which that obtained reaction.  Images of field emission scanning electron microscope (FE-SEM) formation porous agglomeration particles with, irregular...

10.18180/tecciencia.2019.26.5 article EN TECCIENCIA 2019-08-05
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