A5085540044- nanoparticles nucleation surface interactions
- Ion-surface interactions and analysis
- Laser-Ablation Synthesis of Nanoparticles
- Nonlinear Optical Materials Studies
- Luminescence Properties of Advanced Materials
- Laser-induced spectroscopy and plasma
- Gold and Silver Nanoparticles Synthesis and Applications
- Silicon Nanostructures and Photoluminescence
- Diamond and Carbon-based Materials Research
- Material Dynamics and Properties
- Photonic and Optical Devices
- Semiconductor materials and devices
- Copper-based nanomaterials and applications
- Advanced Thermodynamics and Statistical Mechanics
- Photonic Crystals and Applications
- Model Reduction and Neural Networks
- Quantum Dots Synthesis And Properties
- Copper Interconnects and Reliability
- Artificial Intelligence in Healthcare and Education
- Plasmonic and Surface Plasmon Research
- Ferroelectric and Piezoelectric Materials
- AI in cancer detection
- Thin-Film Transistor Technologies
- Advanced Semiconductor Detectors and Materials
- Thermodynamic and Structural Properties of Metals and Alloys
Instituto de Óptica "Daza de Valdés"
2001-2008
Consejo Superior de Investigaciones Científicas
2001-2008
Abstract PRIMAGE is one of the largest and more ambitious research projects dealing with medical imaging, artificial intelligence cancer treatment in children. It a 4-year European Commission-financed project that has 16 partners consortium, including Society for Paediatric Oncology, two imaging biobanks, three prominent paediatric oncology units. The constructed as an observational silico study involving high-quality anonymised datasets (imaging, clinical, molecular, genetics) training...
We analyze the limitations imposed by sample absorption on determination of nonlinear refractive index Z-scan technique. By using a nanostructured thin film consisting Cu nanocrystals embedded in dielectric Al2O3 matrix as an example, we show that thermo-optical effects appearing when linear is significant can be strongly misleading interpretation results Z scan. Even though this effect not new, widespread use technique during past several years makes it necessary to explicitly conditions...
The CHAIMELEON project aims to set up a pan-European repository of health imaging data, tools and methodologies, with the ambition standard provide resources for future AI experimentation cancer management. is 4 year long, EU-funded tackling some most ambitious research in fields biomedical imaging, artificial intelligence treatment, addressing four types that currently have highest prevalence worldwide: lung, breast, prostate colorectal. To allow this, clinical partners external...
Thin films consisting of layers Ag nanocrystals (NCs) embedded in amorphous Al2O3 were grown by pulsed laser deposition. High-resolution electron microscopy was used to characterize the structure films. The growth kinetics NCs studied varying content between 0.8 and 12.4×1015 atoms cm-2 which produced with average diameters 1.1 9.6 nm. At low have a spherical in-plane shape narrow size distribution but they become more elongated broader as increases due coarsening coalescence NCs. Underneath...
Thin films of amorphous aluminum oxide (a-Al2O3) codoped with Er3+ and Yb3+ ions have been in-depth nanostructured by distributing the rate earth (RE) in layers separated 0–3 nm range. The Yb to Er concentration ratio is varied from 0 3.6. photoluminescence (PL) response at 1.53 μm exhibits an increase up two orders magnitude respect that doped only Er. PL intensity improved when are separate results show efficient energy transfer can be achieved for separations 3 nm. Furthermore, it shown...
The optical response of nanocomposite thin films formed by Cu nanoparticles (NPs) embedded in amorphous aluminium oxide (Al2O3) prepared pulsed laser deposition (PLD) vacuum is studied order to investigate the possible existence reactive processes on NPs during their covering with Al2O3. study performed as a function fluence Al2O3 target (0.6–4.6 J cm−2), while for ablation kept constant (1.8 cm−2). structural analysis shows that they are high density average dimensions 4.9–5.9 nm range. has...
Erbium doped Al2O3 films with concentrations up to 6×1020 Er cm−3 have been prepared in a single step process by pulsed-laser deposition. Alternate ablation of and targets has used control the in-depth distribution in-plane concentration Er3+ ions independently. The characteristic photoluminescence response at 1.53 μm studied as function distribution. It is found that lifetime values can be greatly increased increasing Er3+–Er3+ separation above 3 nm. This result related reduced energy...
The thermally induced optical transmission changes upon melting and solidification of Bi nanostructures embedded in amorphous Al(2)O(3) thin films have been studied as a function characteristic sizes the range 7-35 nm. results show repeatable transmission-temperature hysteresis loop with sharp at temperatures. Both temperatures decrease linearly when mean size decreases they are respectively higher lower than that bulk temperature Bi. shows significant contrast increases up to 16% increases....
$\mathrm{Cu}:{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ multilayer nanocomposite thin films have been produced by alternating pulsed laser deposition and analyzed nondestructive synchrotron radiation techniques. The effect of growing in an oxygen atmosphere, or exposing the to atmosphere immediately after copper deposition, on formation properties Cu nanocrystals (NC's) has investigated. optical absorption with deposited vacuum shows a band maximum around 630 nm, which is related surface plasmon...
The transmission of nanocomposite thin films formed by Cu nanocrystals embedded in an amorphous aluminum oxide (Al2O3) matrix has been enhanced the vicinity surface plasmon resonance wavelength, design one-dimensional photonic structures. are distributed layers, whose separation and periodicity used to control optical response films. It is found that at SPR a enhancement up 36% can be achieved with respect film homogeneous distribution nanocrystals. These structures have successfully...
A multilayer nanocomposite consisting of Au nanoparticles separated by layers amorphous Al2O3 was prepared pulsed laser deposition. The energy density used to deposit the varied investigate effects on resulting microstructure. When is deposited it results in resputtering and interfacial mixing into matrix being onto them. This leads a reshaping nanoparticles, elongating them growth direction some cases forming cavities nanoparticles. These become more pronounced with increasing density. high...
Thermally induced transmission and reflectivity changes are investigated in thin films formed by Bi nanostructures embedded amorphous Al2O3. The coalesced nanoparticles forming a quasi-network close to the percolation threshold. Upon heating above melting temperature (>574 K), of film increases abruptly, up 18% respect initial value, which is related melting. cooling, high state remains temperatures as low 436 K, thus evidencing wide melting–solidification hysteresis cycle. existence...
The implantation of bismuth during pulsed laser deposition (PLD) has been directly observed and investigated. Bi was deposited on amorphous aluminum oxide (Al2O3) the energy density target varied by one order magnitude (0.4 to 5 J cm−2). Cross-sectional transmission electron micrographs reveal that, for densities above 2 cm−2, in addition formation nanocrystals, there is a dark apparently continuous layer Al2O3 underneath them. From previous velocity measurements, kinetic species plume...
Pulsed laser deposition in vacuum has been used to develop metal-oxide nanocomposite films with well controlled structural quality. Results for the copper-aluminium oxide (Cu:Al2O3) system are illustrate main morphological and features of these films. High resolution transmission electron microscopy (TEM) analysis shows that consist Cu nanocrystals average dimensions can be between 2 nm 10 embedded an amorphous Al2O3 matrix. It is observed in-plane shape evolves from circular elongated,...
Erbium-doped LiNbO3 films have been produced in a single-step process by alternate pulsed laser deposition. The dopant is incorporated submonolayers whose nominal indepth separation varied the range 1.7–4.0 nm to lead respectively Er concentrations 3.4–0.6×1020 atoms/cm−3. All exhibit characteristic Er3+ photoluminescence at 1.54 μm with lifetime values as high 3 ms. d33 nonlinear coefficients determined from second-harmonic generation experiments are 22–28 pm/V, having submonolayer of 3–4...