Enginyeria Electrònica i Biomèdica: Recent submissions
Now showing items 81-100 of 781
Asymptotic analysis of the Gunn effect with realistic boundary conditions
A general asymptotic analysis of the Gunn effect in n-type GaAs under general boundary conditions for metal-semiconductor contacts is presented. Depending on the parameter values in the boundary condition of the injecting ...
Properties of nitrogen doped silicon films deposited by low-pressure chemical vapor deposition from silane and ammonia
Nitrogen doped silicon (NIDOS) films have been deposited by low-pressure chemical vapor deposition from silane SiH4 and ammonia NH3 at high temperature (750°C) and the influences of the NH3/SiH4 gas ratio on the films ...
Modifications in the Si valence band after ion-beam-induced oxidation
The changes undergone by the Si surface after oxygen bombardment have special interest for acquiring a good understanding of the Si+-ion emission during secondary ion mass spectrometry (SIMS) analysis. For this reason a ...
Multilayered broadband antenna for compact embedded implantable medical devices: design and characterization
Design and characterization of a multilayered compact implantable broadband antenna for wireless biotelemetry applications is presented in this paper. The main features of this novel design are miniaturized size, structure ...
Competitive evolution of the fine contrast modulation and CuPt ordering in InGaP/GaAs layers
We use transmission electron microscopy to characterize the morphology of InGaP epitaxial layers grown by metal‐organic vapor‐phase epitaxy over misoriented GaAs (001) substrates, with a cutoff angle in a range from 0° to ...
Optically active Er3+ ions in SiO2 codoped with Si nanoclusters
Optical properties of directly excited erbium (Er3+) ions have been studied in silicon rich silicon oxide materials codoped with Er3+. The spectral dependence of the direct excitation cross section (σdir) of the Er3+ atomic ...
Calorimetria diferencial de flux: la transició de fase sòlid-líquid de l'aigua
Una de les branques fonamentals de la física és la termodinàmica. Els estudiants universitaris són introduïts generalment a aquesta matèria després d'haver estudiat Mecànica Clàssica i Electromagnetisme. A la termodinàmica, ...
Facile integration of ordered nanowires in functional devices
The integration of one-dimensional (1D) nanostructures of non-industry-standard semiconductors infunctional devices following bottom-up approaches is still an open challenge that hampers the exploita-tion of all their ...
Nano-structured transmissive spectral filter matrix based on guided-mode resonances
Background: In this work, a nanostructured guided-mode resonance filter matrix with high transmission efficiency and narrow bandwidth is demonstrated. The developed nano-filter arrays have various usages, e.g., combined ...
Lunar occultations events from the Earth-Moon equilateral Lagrangian point: Simulations and scientific potential
Recently, a novel idea has been proposed to use a spacecraft orbiting closely around the L4 or L5 Lagrangian points of the Earth–Moon system as a vantage location for astronomical observations under unique and advantageous ...
Analysis of geometrical effects on the behavior of transverse and longitudinal modes of amorphous silicon compounds
The peak frequency, width, and shape of the transverse-optical (TO) and longitudinal-optical (LO) infrared absorption modes of silicon oxides (SiO2, SiOx), silicon nitrides (Si3N4, SiNx), silicon oxynitrides (SiOxNy), and ...
Instrumental drift removal in GC-MS data for breath analysis: the short-term and long term temporal validation of putative biomarkers for COPD
Breath analysis holds the promise of a non-invasive technique for the diagnosis of diverse respiratory conditions including COPD and lung cancer. Breath contains small metabolites that may be putative biomarkers of these ...
Gas-sensing properties of sprayed films of (CdO)x(ZnO)1-x mixed oxide
A novel NO2 sensor based on (CdO)x(ZnO)1-x mixed-oxide thin films deposited by the spray pyrolysis technique is developed. The sensor response to 3-ppm NO2 is studied in the range 50°C-350°C for three different film ...
Artificial Intelligence-Enabled ECG Algorithm Based on Improved Residual Network for Wearable ECG
Heart disease is the leading cause of death for men and women globally. The residual network (ResNet) evolution of electrocardiogram (ECG) technology has contributed to our understanding of cardiac physiology. We propose ...
Towards the growth of Cu2ZnSn1-xGexS4 thin films by a single-stage process : effect of substrate temperatura and composition
Cu2ZnSn1-xGexS4 (CZTGS) thin films prepared by flash evaporation of a Zn-rich Cu2ZnSn0.5Ge0.5S4 bulk compound in powder form, and a subsequent thermal annealing in S containing Ar atmosphere are studied. The effect of the ...
Charge Transfer Characteristics of n-type In0.1Ga0.9N Photoanode across Semiconductor-Liquid Interface
Understanding the mechanisms of charge transfer across the semiconductor/liquid interface is crucial to realize efficient photoelectrochemical devices. Here, the interfacial charge transfer characteristics of n-type ...
Search for the X(4140) state in B+→J/ψϕK+ decays
A search for the X ( 4140 ) state in B + → J / ψ ϕ K + decays is performed with 0.37 fb − 1 of p p collisions at √ s = 7 TeV collected by the LHCb experiment. No evidence for this state is found, in 2.4 σ disagreement ...
Scalable heating-up synthesis of monodisperse Cu2ZnSnS4 nanocrystals
Monodisperse Cu2ZnSnS4 (CZTS) nanocrystals (NCs), with quasi-spherical shape, were prepared by a facile, high-yield, scalable, and high-concentration heat-up procedure. The key parameters to minimize the NC size distribution ...
Magnetization reversal and magnetic anisotropies in epitaxial Fe/MgO and Fe/MgO/Fe heterostructures grown on Si(001)
Epitaxial Fe/MgO heterostructures have been grown on Si(001) by a combination of sputtering and laser ablation deposition techniques. The growth of MgO on Si(001) is mainly determined by the nature of the interface, with ...
Effects of SrTiO3 capping in La2/3Ca1/3MnO3 electrodes of different orientations
We report on the study of the structural, magnetic, and electronic properties of SrTiO3 capped La2/3Ca1/3MnO3 electrodes grown on (001) and (110) SrTiO3 substrates. Magnetic properties of the (001) and (110) capped electrodes ...
