A5030268487- Luminescence Properties of Advanced Materials
- Luminescence and Fluorescent Materials
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Photochemistry and Electron Transfer Studies
- Gas Sensing Nanomaterials and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Nanomaterials in Catalysis
- Dyeing and Modifying Textile Fibers
- Nanocluster Synthesis and Applications
- Organic Light-Emitting Diodes Research
- Molecular Sensors and Ion Detection
- Cultural Heritage Materials Analysis
- Quantum Dots Synthesis And Properties
- Optical properties and cooling technologies in crystalline materials
- Sulfur Compounds in Biology
- Analytical Chemistry and Sensors
- Nanoplatforms for cancer theranostics
- Optical Imaging and Spectroscopy Techniques
- Organic Electronics and Photovoltaics
- Neuroscience and Neural Engineering
- Photoreceptor and optogenetics research
- Lanthanide and Transition Metal Complexes
- Forensic Fingerprint Detection Methods
- Chalcogenide Semiconductor Thin Films
University of Chile
2018-2025
Universidad Bernardo O'Higgins
2022-2024
Austral University of Chile
2022-2024
Universidad de Santiago de Chile
2022-2024
Universidad Tecnológica de Santiago
2018
Draper Laboratory
2013
Abstract This study investigates the critical role of polymer matrices in optimizing luminescence and energy transfer, utilizing commercial dyes Coumarin 6 (C6) Rhodamine B (RhB) as a donor‐acceptor pair. Solution‐phase experiments revealed dependence transfer efficiency on solvent dielectric constant. Furthermore, embedding within Poly(methyl methacrylate) (PMMA) or Poly(vinyl butyral) (PVB) significantly enhance due to increased molecular proximity. A modified approach for calculating...
Plasmonic materials can be utilized as effective platforms to enhance luminescent signals of metal nanoclusters (LMNCs). Both surface enhanced fluorescence (SEF) and shell‐isolated nanoparticle‐enhanced (SHINEF) strategies take advantage the localized increased external electric field created around plasmonic when excited at or near their characteristic resonance. In this context, we present an experimental computational study different composites, (Ag) Ag@SiO2 (Au) Au@SiO2 nanoparticles,...
A new Rhodamine-based "Turn On" fluorescent probe (E)- 3′,6′-bis(diethylamino)-2-((2,5-dimethoxybenzylidene)amino)spiro[isoindoline-1,9′-xanthen]-3-one (WGB) was synthesized. Results show that WGB is selective for Cu2+ cations, forming a WGB-Cu2+ complex in 2:1 stoichiometry, confirmed through density functional theory (DFT) electronic structure calculations and reactive molecular dynamics (MD) simulations. Theoretical agreed with the experimental data. The detection limit of WGB-Cu+2 6.76 ×...
Photovoltaics has become one of the emerging alternatives to progressively supply/replace conventional energy sources, considering potential exploitation solar energy. Depending on nature light harvester influence its light-absorption capability and facility produce electricity, different generations devices have been fabricated. Early studies organic molecules (dye sensitizers) with good absorption coefficients, going through metal chalcogenides and, lastly, timely emergence halide...
Abstract The ligand passivation is considered an attractive strategy to prepare high‐quality perovskite nanocrystals (PNCs) with improved photophysical features in polar media. However, the long‐term stabilization of PNCs these environments still challenging, being pivotal understanding protection mechanism given by prominent surface ligands and avoiding material deterioration solvents. In this work, how nature diverse alkylammonium bromides used during influences properties quality CsPbX 3...
SERS spectroscopy is successfully employed in this work to reveal different components integrating the cochineal colorant for dying archaeological textile samples from Arica Region North Chile. This analysis was done by in-situ experiments that does not imply material (colorant and biomolecules) extraction. The spectroscopic of textiles reveals presence bands attributed carminic acid nucleobases, mainly adenine guanine. identification these biomolecules also verified raw extract dyed replica...
A new probe (E)-7-(diethylamino)-3-(3-(thiophen-2-yl)acryloyl)-2H-chromen-2-one (ChC16) was synthesized and studied as a turn-on fluorescent probe, based on Michael addition mechanism for sensing SO2 derivatives, which is favored in the presence of cationic micellar media such cetylpyridinium bromide (CPB). The showed high selectivity sensitivity toward bisulfite over other anions biothiols, including cysteine (Cys), homocysteine (Hcy) glutathione (GSH), with detection limit 240 nM....
Because of the growing demand for use photovoltaic cells to transform solar energy into electrical energy, radiation concentration systems such as luminescent concentrators (LSCs) have gained significant attention. This work presents an LSC system based on effect SiO2-capped silver nanoparticles (AgSiO2@NPs) optical efficiency LSC. For this purpose, AgSiO2@NPs were deposited a polymethylmethacrylate (PMMA) substrate using layer-by-layer technique, and material tetraphenylporphyrin (TPP)...
Aggregation-Induced Emission (AIE) luminogens have garnered significant interest due to their distinctive applications in different applications. Among the diverse molecular architectures, those based on triphenylamine and thiophene hold prominence. However, a comprehensive understanding of deactivation mechanism both solution films remains lacking. In this study, we synthesized characterized spectroscopically two AIE luminogens:...
Carbon dots (CDs) have been quickly extended for nanomedicine uses because of their multiple applications, such as bioimaging, sensors, and drug delivery. However, the interest in increasing photoluminescence properties is not always accompanied by cytocompatibility. Thus, a knowledge gap exists regarding interactions with biological systems linked to selected formulations synthesis methods. In this work, we developed carbon based on poly (ethylene imine) (PEI) chitosan (CS) using microwave...
Shell-isolated nanoparticle-enhanced fluorescence (SHINEF) is a variation of surface-enhanced (SEF) that involves the use core–shell nanostructures to enhance signals. This increase in signals achieved due enhanced local electric field produced by light stimulation toward plasmonic metal core nanostructure. In SHINEF, thin insulating shell introduced around core, creating structure enhances nearby molecules while minimizing unwanted interactions with such as energy transfer events. this...
We investigated the surface-enhanced effect on photoluminescence of two europium-doped spinels produced by modified surfaces containing Ag@SiO 2 core–shell nanoparticles.
Abstract The high consumption of fossil fuels and concomitant contamination the environment have promoted search for new, low‐cost, cleaner energy sources to satisfy current demand around world, decreasing levels greenhouse gas emissions atmosphere. One promising strategies facilitate generation renewable involves solar‐driven chemical reactions, by using photocatalysts with improved sunlight absorption carrier transfer abilities. Lead‐free halide perovskites (LFHPs) are good candidates,...
An optical-electrical neural `Optrode' is developed for quantitative optical spectroscopic assessment of cortical tissue damage around a implant. In contrast to other Optrodes which illuminate activation, this work uses bi-directional waveguides obtain information from the tissue. has potential providing real-time histological assessment, by quantifying changes in absorption and scattering properties associated with oxygenation density probe, impedance spectroscopy provides limited insight....
Abstract SERS spectroscopy is successfully employed in this work to reveal different components integrating the cochineal colorant for dying archaeological textile samples from Arica region North Chile. This analysis was done by in-situ experiments that does not imply material (colorant and biomolecules) extraction. The spectroscopic of textiles reveals presence bands attributed carminic acid nucleobases, mainly adenine guanine. identification these biomolecules also verified raw extract...
We studied the surface-enhanced effect exerted by modified surfaces with Ag@SiO 2 and Au@SiO core–shell nanoparticles on photoluminescence of two chromium-doped spinels.