Enginyeria Electrònica i Biomèdica: Envíos recientes
Mostrando ítems 141-160 de 781
Linear and nonlinear optical properties of Si nanocrystals in SiO2 deposited by plasma-enhanced chemical-vapor deposition
Linear and nonlinear optical properties of silicon suboxide SiOx films deposited by plasma-enhanced chemical-vapor deposition have been studied for different Si excesses up to 24¿at.¿%. The layers have been fully characterized ...
Spectroscopic ellipsometry study of Cu2ZnSnSe4 bulk crystals
Using spectroscopic ellipsometry we investigated and analyzed the pseudo-optical constants of Cu2ZnSnSe4 bulk crystals, grown by the Bridgman method, over 0.8-4.5 eV photon energy range. The structures found in the spectra ...
Inkjet‐Printed p‐NiO/n‐ZnO Heterojunction Diodes for Photodetection Applications
Transparent Conducting Oxides (TCOs) are an enticing family of optoelectronic materials which have been proven to increase efficiency when incorporated into perovskite light emitting diode (PE-LED) and organic OLED ...
Low dark count geiger mode avalanche photodiodes fabricated in conventional CMOS technologies
Avalanche photodiodes operated in the Geiger mode present very high intrinsic gain and fast time response, which make the sensor an ideal option for those applications in which detectors with high sensitivity and velocity ...
Continuous spatial representations in the olfactory bulb may reflect perceptual categories
In sensory processing of odors, the olfactory bulb is an important relay station, where odor representations are noise-filtered, sharpened, and possibly re-organized. An organization by perceptual qualities has been found ...
Continuous Live-Cell Culture Imaging and Single-Cell Tracking by Computational Lensfree LED Microscopy
Continuous cell culture monitoring as a way of investigating growth, proliferation, and kinetics of biological experiments is in high demand. However, commercially available solutions are typically expensive and large ...
Perpendicular magnetic anisotropy in chemically disordered FePd-FeV(100) alloy thin films
We find that the use of V(100) buffer layers on MgO(001) substrates for the epitaxy of FePd binary alloys yields to the formation at intermediate and high deposition temperatures of a FePd¿FeV mixed phase due to strong V ...
Electron capture and emission by the Ti acceptor level in GaP
Previously reported results on deep level optical spectroscopy, optical absorption, deep level transient spectroscopy, photoluminescence excitation, and time resolved photoluminescence are reviewed and discussed in order ...
Effects of Nb doping on the TiO2 anatase-to-rutile phase transition
We study the influence of Nb doping on the TiO2 anatase-to-rutile phase transition, using combined transmission electron microscopy, Raman spectroscopy, x-ray diffraction and selected area electron diffraction analysis. ...
Sphericity and Roundness Computation for Particles using the Extreme Vertices Model
Shape is a property studied for many kinds of particles. Among shape parameters, sphericity and roundness indices had been largely studied to understand several processes. Some of these indices are based on length measurements ...
Resistive switching and charge transport mechanisms in ITO/ZnO/p-Si devices
The resistive switching properties of ITO/ZnO/p-Si devices have been studied, which present welldefined resistance states with more than five orders of magnitude difference in current. Both the high resistance state (HRS) ...
Engineering grain boundaries at the 2D limit for the hydrogen evolution reaction
Atom-thin transition metal dichalcogenides (TMDs) have emerged as fascinating materials and key structures for electrocatalysis. So far, their edges, dopant heteroatoms and defects have been intensively explored as active ...
GdBaCo2O5+x layered perovskite as an intermediate temperature solid oxide fuel cell cathode
GdBaCo2O5+x (GBCO) was evaluated as a cathode for intermediate-temperature solid oxide fuel cells. A porous layer of GBCO was deposited on an anode-supported fuel cell consisting of a 15m thick electrolyte of yttria-stabilized ...
Tuning branching in ceria nanocrystals
Branched nanocrystals (NCs) enable high atomic surface exposure within a crystalline network that provides avenues for charge transport. This combination of properties makes branched NCs particularly suitable for a range ...
A Novel Approach for a Chip-Sized Scanning Optical Microscope
The recent advances in chip-size microscopy based on optical scanning with spatially resolved nano-illumination light sources are presented. This new straightforward technique takes advantage of the currently achieved ...
Green luminescence of Er3+ in stoichiometric KYb(WO4)2 single crystals
We grew good-optical-quality KYb~WO4)2 single crystals doped with erbium ions by the top seeded solution growth slow cooling method. Optical absorption of erbium was performed at room temperature ~RT! and at 6 K. Green ...
Anomalous crossover between thermal and shot noise in macroscopic diffusive conductors
We predict the existence of an anomalous crossover between thermal and shot noise in macroscopic diffusive conductors. We first show that, besides thermal noise, these systems may also exhibit shot noise due to fluctuations ...
Design of the OBELIX monolithic CMOS pixel sensor for an upgrade of the Belle II vertex detector
The Belle II collaboration has initiated a program to upgrade its detector in order to address the challenges set by the increase of the SuperKEKB collider luminosity, targeting 6×1035 cm2 s-1. A monolithic CMOS pixel ...
Conduction mechanisms and charge storage in Si-nanocrystals metal-oxide-semiconductor memory devices studied with conducting atomic force microscopy
In this work, we demonstrate that conductive atomic force microscopy (C-AFM) is a very powerful tool to investigate, at the nanoscale, metal-oxide-semiconductor structures with silicon nanocrystals (Si-nc) embedded in the ...
Structure and magnetic properties of Co-doped ZnO nanoparticles
In this work we carefully analyze the role of the microstructure on the magnetic properties of Co-doped ZnO nanoparticles prepared by the vaporization-condensation method in a solar reactor. We show that a close correlation ...
