Enginyeria Electrònica i Biomèdica: Enviaments recents
Ara mostrant els elements 61-80 de 781
Synthesis and thermoelectric properties of noble metal ternary chalcogenide systems of Ag-Au-Se in the forms of alloyed nanoparticles and colloidal nanoheterostructures
The optimization of a material functionality requires both the rational design and precise engineering of its structural and chemical parameters. In this work, we show how colloidal chemistry is an excellent synthetic ...
A gated single-photon avalanche diode array fabricated in a conventional CMOS process for triggered systems
A bidimensional array based on single-photon avalanche diodes for triggered imaging systems is presented. The diodes are operated in the gated mode of acquisition to reduce the probability to detect noise counts interfering ...
Vacancy and interstitial depth profiles in ion-implanted silicon
An experimental method of studying shifts between concentration-versus-depth profiles of vacancy- and interstitial-type defects in ion-implanted silicon is demonstrated. The concept is based on deep level transient ...
Improvement of the quality factor of RF integrated inductors by layout optimization
A systematic method to improve the quality (Q) factor of RF integrated inductors is presented in this paper. The proposed method is based on the layout optimization to minimize the series resistance of the inductor coil, ...
Portable Bio-Devices: Design of Electrochemical Instruments from Miniaturized to Implantable Devices
The integration of biosensors and electronic technologies allows the development of biomedical systems able to diagnose and monitoring pathologies by detecting specific biomarkers. The chapter presents the main modules ...
A physical frequency-dependent compact model for RF integrated inductors
A frequency-dependent compact model for inductors in high ohmic substrates, which is based on an energy point-of-view, is developed. This approach enables the description of the most important coupling phenomena that take ...
Trackability of distal access catheters: an in vitro quantitative evaluation of navigation strategies
Background: In mechanical thrombectomy (MT), distal access catheters (DACs) are tracked through the vascular anatomy to reach the occlusion site. The inability of DACs to reach the occlusion site has been reported as a ...
Design and fabrication of a microsystem to handle biological objects
Biological particle microhandling is a common operation in medicine and microbiology, and a lot of research work has been addressed to develop faster, cheaper and more efficient manipulation techniques. In this way, ...
Dynamic compact thermal models with multiple power sources: application to an ultrathin chip stacking technology
Whereas numerical modeling using finite-element methods (FEM) can provide transient temperature distribution in the component with enough accuracy, it is of the most importance the development of compact dynamic thermal ...
Microfluidic 3D platform to evaluate endothelial progenitor cell recruitment by bioactive materials
Most of the conventional in vitro models to test biomaterial-driven vascularization are too simplistic to recapitulate the complex interactions taking place in the actual cell microenvironment, which results in a poor ...
Epitaxial growth of biferroic YMnO3(0001) on platinum electrodes
Epitaxial films of the biferroic YMnO3 (YMO) oxide have been grown on platinum-coated SrTiO3(1 1 1) and Al2O3(0 0 0 1) substrates. The platinum electrodes, (1 1 1) oriented, are templates for the epitaxy of the hexagonal ...
Understanding odor information segregation in the olfactory bulb by means of mitral and tufted cells
Odor identification is one of the main tasks of the olfactory system. It is performed almost independently from the concentration of the odor providing a robust recognition. This capacity to ignore concentration information ...
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 ...
