Enginyeria Electrònica i Biomèdica: Recent submissions
Now showing items 241-260 of 781
Influence of premetallization surface treatment on the formation of Schottky Au-nGaN contacts
The influence of premetallization surface preparation on the structural, chemical, and electrical properties of Au-nGaN interfaces has been investigated by x-ray photoemission spectroscopy (XPS), current-voltage measurement ...
Continuous phase shift of sinusoidal signals using injection locked oscillators
This work presents an alternative to generate continuous phase shift of sinusoidal signals based on the use of super harmonic injection locked oscillators (ILO). The proposed circuit is a second harmonic ILO with varactor ...
Progress and perspectives of thin film kesterite photovoltaic technology: a critical review
The latest progress and future perspectives of thin film photovoltaic kesterite technology are reviewed herein. Kesterite is currently the most promising emerging fully inorganic thin film photovoltaic technology based on ...
Metal-Nitride-oxide-semiconductor light-emitting devices for general lighting.
The potential for application of silicon nitride-based light sources to general lighting is reported. The mechanism of current injection and transport in silicon nitride layers and silicon oxide tunnel layers is determined ...
Optical response of Cu3Ge thin films
We report an investigation on the optical properties of Cu3Ge thin films displaying very high conductivity, with thickness ranging from 200 to 2000 Å, deposited on Ge substrates. Reflectance, transmittance, and ellipsometric ...
Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition.
We present a detailed study on the morphology and magnetic properties of Co nanostructures deposited onto oxidized Si substrates by femtosecond pulsed laser deposition. Generally, Co disks of nanometric dimensions are ...
Improved multiexponential transient spectroscopy by iterative deconvolution
The analysis of multiexponential decays is challenging because of their complex nature. When analyzing these signals, not only the parameters, but also the orders of the models, have to be estimated. We present an improved ...
Energy transfer mechanism and Auger effect in Er3+ coupled silicon nanoparticle samples
We report a spectroscopic study about the energy transfer mechanism among silicon nanoparticles (Si-np), both amorphous and crystalline, and Er ions in a silicon dioxide matrix. From infrared spectroscopic analysis, we ...
System model of an Image Stabilization System
The Polarimetric and Helioseismic Imager (PHI) instrument is part of the remote instruments for the ESA Solar Orbiter (SO), which is scheduled to launch in 2017. PHI captures polarimetric images from the Sun to better ...
Al2O3 microring resonators for the detectin of a cancer biomarker in undiluted urine
: Concentrations down to 3 nM of the rhS100A4 protein, associated with human tumor development, have been detected in undiluted urine using an integrated sensor based on microring resonators in the emerging Al2O3 photonic ...
Low-cost impedance measurements for lab-on-a-chip architectures: Towards potentiostat miniaturization
The development of miniaturized potentiostats capable of measuring in a wide range of conditions and with full characteristics (e.g., wide bandwidth and capacitive/inductive contribution to sensor's impedance) is still an ...
Large area in situ fabrication of Poly(pyrrole)-nanowires on flexible thermoplastic films using Nanocontact printing
Abstract: Highly efficient nano-engineering tools will certainly revolutionize the biomedical and sensing devices research and development in the years to come. Here, we present a novel high performance conducting poly(pyrrole) ...
Shot-noise suppression in Schottky barrier diodes
We give a theoretical interpretation of the noise properties of Schottky barrier diodes based on the role played by the long range Coulomb interaction. We show that at low bias Schottky diodes display shot noise because ...
3D-Printed Broadband Power Divider Based on Helical-Microstrip Transmission Line Segments
Received May 17, 2022, accepted June 3, 2022, date of publication June 13, 2022, date of current version June 20, 2022. Digital Object Identifier 10.1109/ACCESS.2022.3182707 3D-Printed Broadband Power Divider Based ...
Readout electronics for low dark count pixel detectors based on geiger mode avalanche photodiodes fabricated in conventional CMOS technologies for future linear colliders
The high sensitivity and excellent timing accuracy of Geiger mode avalanche photodiodes makes them ideal sensors as pixel detectors for particle tracking in high energy physics experiments to be performed in future linear ...
Efficiency and reliability enhancement of silicon nanocrystal field-effect luminescence from nitride-oxide gate stacks
We report on a field-effect light emitting device based on silicon nanocrystals in silicon oxide deposited by plasma-enhanced chemical vapor deposition. The device shows high power efficiency and long lifetime. The power ...
Composition modulation and inhomogeneous strain field in InxGa1-xAs/InP strained layers
Optical-absorption measurements have been carried out on tensile and compressive In x Ga 1 − x As/InP strained layers. It is shown that the energetic dispersion of the heavy-hole relative to the light-hole subband ...
Graphene/TiO2 Heterostructure Integrated with a Micro-Lightplate for Low-Power NO2 Gas Detection
Low-power gas sensors that can be used in IoT (Internet of Things) systems, consumer devices, and point-of-care devices will enable new applications in environmental monitoring and health protection. We fabricated a ...
Design, manufacture and characterization of compact filter assemblies for radiofrequency applications
This paper presents the use of additive manufacturing in the design and fabrication of a non-planar fully 3Dprinted low-pass filter. The process implements stereolithographic 3D printing and copper electroplating to produce ...
Recombination dynamics in ZnO nanowires: Surfaces states versus mode quality factor
In this work, we investigate the influence of finite size on the recombinations dynamics of ZnO nanowires. We demonstrate that diameter as well as lenght of nanowires determine the lifetime of the neutral donor bound ...
