A5047415282- Silicon Nanostructures and Photoluminescence
- Nanowire Synthesis and Applications
- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Iron oxide chemistry and applications
- ZnO doping and properties
- Nanoplatforms for cancer theranostics
- Magnetic Properties and Applications
- Physics of Superconductivity and Magnetism
- Magnetic Properties and Synthesis of Ferrites
- Gold and Silver Nanoparticles Synthesis and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Multiferroics and related materials
- Magnetic Properties of Alloys
- Advancements in Solid Oxide Fuel Cells
- Quantum Dots Synthesis And Properties
- Theoretical and Computational Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear materials and radiation effects
- Anodic Oxide Films and Nanostructures
- Minerals Flotation and Separation Techniques
- Luminescence Properties of Advanced Materials
Madrid Institute for Advanced Studies
2022-2025
Universidad Complutense de Madrid
2018-2025
Instituto de Ciencia de Materiales de Madrid
2014-2021
European Synchrotron Radiation Facility
2014-2021
Universidad Autónoma de Madrid
2008-2019
Hiroshima University
2016-2019
Elkhorn Slough Foundation
2016
Consejo Superior de Investigaciones Científicas
2011-2016
European Science Foundation
2015
Instituto de Cerámica y Vidrio
2011-2013
Progress of thermal tumor therapies and their translation into clinical practice are limited by insufficient nanoparticle concentration to release therapeutic heating at the site after systemic administration. Herein, use Janus magneto-plasmonic nanoparticles, made gold nanostars iron oxide nanospheres, as efficient nanoheaters whose on-site delivery can be improved magnetic targeting, is proposed. Single combined magneto- photo-thermal properties nanoparticles render them compelling...
We present a novel and easy synthetic path to prepare ε-Fe<sub>2</sub>O<sub>3</sub>(∼90%) with small portion of α-Fe<sub>2</sub>O<sub>3</sub>nanoparticles embedded in an amorphous silica matrix.
Improved electrochemical performance of (Nd,Gd) 1/3 Sr 2/3 CoO 3− δ :Ce 0.9 (Gd,Nd) 0.1 O 1.95 air electrode for SOFCs employing spray pyrolysis deposition and simultaneous decoration with Ag nanoparticles.
Nanoparticle-mediated thermal treatments have demonstrated high efficacy and versatility as a local anticancer strategy beyond traditional global hyperthermia. Nanoparticles act heating generators that can trigger therapeutic responses at both the cell tissue level. In some cases, treatment happens in absence of temperature rise, damaging tumor cells even more selectively than other nanotherapeutic strategies. The precise determination vicinity such nanoheaters then stands heart approaches...
Electrodeposition of gold into porous silicon was investigated. In the present study, with ~100 nm in pore diameter, so-called medium-sized pores, used as template electrode for electrodeposition. The growth behavior deposits studied by scanning electron microscope observation deposited silicon. Gold nanorod arrays different rod lengths were prepared, and their surface-enhanced Raman scattering properties We found that absorption peak due to surface plasmon resonance can be tuned changing...
Abstract Gold‐coated silver nanoparticles (Ag@AuNPs) are synthesized by green synthesis using Vaccinium corymbosum as reducing agent. The obtained Ag@AuNPs present a core‐shell structure with nanostar shape. absorption spectrum of these shows prominent band centred at 680 nm, within the optimal range for photothermal applications. Dispersions in water, 1.87 10 NPs/mL, reach temperature 44.3 °C under laser excitation minutes, which is suitable hyperthermia therapy. internalization Ag@AuNPs,...
The purpose of this work is to fabricate self-assembled microstructures by the sol-gel method and study morphological, structural compositional dependence ε-Fe2O3 nanoparticles embedded in silica when glycerol (GLY) cetyl-trimethylammonium bromide (CTAB) are added as steric agents simultaneously. combined action a polyalcohol surfactant significantly modifies morphology sample giving rise different microstructure each studied cases (1, 3 7 days magnetic stirring time). This due fact that...
Epsilon iron oxide (ε-Fe2O3) coatings on Si(100) substrates are obtained by an easy one-pot sol-gel recipe assisted glycerol in acid medium. Glycerol, given its small dimensions, enables the formation of ε-Fe2O3 nanoparticles with a size few nanometers and highest purity is reached after densification treatment at 960 °C. The structural compositional evolution up to 1200 °C studied confocal Raman microscopy X-ray absorption spectroscopy techniques, correlating existing magnetic properties....
Temperature plays a critical role in regulating body mechanisms and indicating inflammatory processes. Local temperature increments above 42 °C are shown to kill cancer cells tumorous tissue, leading the development of nanoparticle-mediated thermo-therapeutic strategies for fighting oncological diseases. Remarkably, these therapeutic effects can occur without macroscopic rise, suggesting localized nanoparticle heating, minimizing side on healthy tissues. Nanothermometry has received...
The best performances are obtained for low <italic>x</italic> due to a compromise between sufficiently high amount of defects, but not so induce defect clustering.
Abstract The surface properties of porous silicon (PSi) evolve rapidly in phosphate‐buffered saline. X‐ray photoelectron spectra indicate the formation a Si–OH and C–O enriched surface, which becomes increasingly hydrophilic with aging time. Multiscale stripe micropatterns Si PSi have been fabricated by means high‐energy ion‐beam irradiation process. These aged physiological conditions used to analyze human mesenchymal stem cell (hMSC) adhesion. actin cytoskeleton hMSCs orients following...
This work describes a novel process for the fabrication of hybrid nanostructured particles showing intense tunable photoluminescence and simultaneous ferromagnetic behavior. The involves synthesis porous silicon (NPSi) by chemical anodization crystalline subsequent in pore growth Co nanoparticles electrochemically-assisted infiltration. Final are obtained sonication Co-infiltrated NPSi layers conjugation with poly(ethylene glycol) aiming at enhancing their hydrophilic character. These...
We present structural, electronic, and morphological characterization of thin (7.5 nm, 9 unit cells) ultrathin (1.7 2 Fe3O4 layers grown on SrTiO3(001) by oxygen assisted molecular beam epitaxy (MBE) pulsed laser deposition (PLD) methods. The analysis show single-phase single oriented (001) that grow forming a coincidence lattice the order 13. Such an incommensurate growth is for all layers, independent evaporation method layer thickness. magnetite which are strain-free, provide sharp...
Nowadays, iron oxide-based nanostructures are key materials in many technological areas. Their physical and chemical properties can be tailored by tuning the morphology. In particular, possibility of increasing specific surface area has turned oxide nanowires (NWs) into promising functional applications. Among different possible NWs that fabricated, maghemite/hematite core/shell structures have particular importance since they combine magnetism inner maghemite core with interesting hematite...
The engineering of surface patterns is a powerful tool for analyzing cellular communication factors involved in the processes adhesion, migration, and expansion, which can have notable impact on therapeutic applications including tissue engineering. In this regard, main objective research was to fabricate patterned textured surfaces at micron- nanoscale levels, respectively, with very different chemical topographic characteristics control cell-substrate interactions. For task,...
In this paper we analyze the structure of Fe-Ga layers with a Ga content \ensuremath{\sim}30 at.% deposited by sputtering technique under two different regimes. We also studied correlation between and magnetic behavior samples. Keeping Ar pressure fixed, modified flow regime from ballistic to diffusive increasing distance target substrate. X-ray diffraction measurements have shown lower structural quality when growing in flow. investigated impact growth means x-ray absorption fine (XAFS)...
The localized irradiation of Si allows a precise patterning at the microscale nanostructured materials such as porous silicon (PS). PS patterns with precisely defined geometries can be fabricated using ion stopping masks. nanoscale textured micropatterns were used to explore their influence microenvironments for human mesenchymal stem cells (hMSCs). In fact, change photoluminescence emission from upon aging in physiological solution suggests intense formation silanol surface groups, which...