Enginyeria Electrònica i Biomèdica: Envíos recientes
Mostrando ítems 441-460 de 787
Bioimpedance Technique for Point-of-Care Devices Relying on Disposable Label-Free Sensors – An Anemia Detection Case
In this chapter, the development of a point-of-care device for bio-medical applications has been discussed. Our main objective is to research new electronic solutions for the detection, quantification, and monitoring of ...
Area-Efficient Mixed-Signal Time-to-Digital Converter Integration for Time-Resolved Photon Counting
Digital histogram generation for time-resolved measurements with single-photon avalanche diode (SPAD) sensors requires the storage of many timestamp signals. This work presents a mixed-signal time-to-digital converter (TDC) ...
Characterization of the EL2 center in GaAs by optical admittance spectroscopy
We have measured the electron optical capture cross section, σ0n(hν), of EL2 (the most important native center in GaAs) using a new technique which we have recently developed: optical admittance spectroscopy. This is a ...
Més enllà de la innovació docent: de la innovació al coneixement, del coneixement al suport, del suport a la renovació docent a la Universitat de Barcelona.
La implantació dels nous graus com a desenvolupament de les directrius de l'EEES plantegen tot un seguit de reptes per a la comunitat docent en general, i per a la nostra universitat en particular. En aquest article es ...
The complete Raman spectrum of nanometric SnO2 particles
The complete Raman spectrum of SnO2 nanoparticles in presented and analyzed. In addition to the "classical" modes observed in the rutile structure, two other regions shown Raman activity for nanoparticles. The Raman bands ...
DNA-origami-driven lithography for patterning on gold surfaces with sub-10 nm resolution
Sub-10 nm lithography of DNA patterns is achieved using the DNA-origami stamping method. This new strategy utilizes DNA origami to bind a preprogrammed DNA ink pattern composed of thiol-modified oligonucleotides on gold ...
Active gating as a method to inhibit the crosstalk of Single Photon Avalanche Diodes in a shared well
This work presents low noise readout circuits for silicon pixel detectors based on Geiger mode avalanche photodiodes. Geiger mode avalanche photodiodes offer a high intrinsic gain as well as an excellent timing accuracy. ...
BPSK to ASK signal conversion using injection-locked oscillators-Part I: theory
This paper presents a new method and circuit for the conversion of binary phase-shift keying (BPSK) signals into amplitude shift keying signals. The basic principles of the conversion method are the superharmonic injection ...
Long-range order of Ni2+ and Mn4+ and ferromagnetism in multiferroic (Bi0.9La0.1)2NiMnO6 thin films
Epitaxial thin films of biferroic Bi1−xLax 2NiMnO6 have been grown on SrTiO3 001 substrates. High resolution electron microscopy, energy-loss spectroscopy and synchrotron radiation have been used to demonstrate that, under ...
Alloy inhomogeneities in InAlAs strained layers grown by MBE
Transmission electron microscopy studies have been performed to characterize InxAl1−xAs layers grown by molecular beam epitaxy on (100) InP substrates. The first observations of compositional nonuniformities in strained ...
Teragnosis in vivo: Innovación nanomédica fomentada por la convergencia de tecnologías emergentes
El creciente desarrollo y la mejora en cuanto a innovación de dispositivos basados en la convergencia de tecnologías emergentes ha dado lugar a un uso cada vez mayor de los nanosensores en la comunidad biomédica. Sin ...
Sensor-integrated microfluidic approaches for liquid biopsies applications in early detection of cancer
Cancer represents one of the conditions with the most causes of death worldwide. Common methods for its diagnosis are based on tissue biopsies the extraction of tissue from the primary tumor, which is used for its histological ...
Sensitivity of the Cherenkov Telescope Array for probing cosmology and fundamental physics with gamma-ray propagation
The Cherenkov Telescope Array (CTA), the new-generation ground-based observatory for gamma-ray astronomy, provides unique capabilities to address significant open questions in astrophysics, cosmology, and fundamental ...
Compatibility Study of 3D Printing and PCB Technologies for RF Components and Circuits
This paper explores the potential of combining additive manufacturing with printed circuit board technology to fabricate radio frequency components and circuits. This combination aims to leverage the design freedom of ...
Gated Geiger mode avalanche photodiode pixels with integrated readout electronics for low noise photon detection
Avalanche photodiodes operated in the Geiger mode offer a high intrinsic gain as well as an excellent timing accuracy. These qualities make the sensor specially suitable for those applications where detectors with high ...
Design, Additive Manufacturing, and Characterization of a Symmetric 3-Way Wilkinson Power Divider/Combiner
This work presents the design, manufacturing and electromagnetic characterization of compact 3-way Wilkinson power divider/combiner prototypes intended to work in the sub-GHz frequency band. The primary objective is to ...
Characterization of the electrical properties of individual tin-oxide nanowires contacted to platinum nanoelectrodes
A simple and useful experimental alternative to field-effect transistors for measuring electrical properties free electron concentration nd, electrical mobility , and conductivity in individual nanowires has been developed. ...
3D Visualization of the Iron Oxidation State in FeO/Fe3O4 Core-Shell Nanocubes from Electron Energy Loss Tomography.
Left panel shows the explained variance ratio of the principal component analysis (PCA) decomposition. The six first components, which are enough to explain the whole data set, are plotted in the right panel. Components ...
Enhanced low field magnetoresistive response in (La2/3Sr1/3MnO3)x/(CeO2)1-x composite thick films prepared by screen printing
The magnetoresistance and magnetization of (La2/3Sr1/3MnO3)x(LSMO)/(CeO2)1−x (0.64⩽x⩽1) composite thick films have been studied as a function of the manganite concentration. It is found that for high LSMO content, when the ...
Correlation between charge transport and electroluminescence properties of Si-rich oxide/nitride/oxide-based light emitting capacitors.
The electrical and electroluminescence (EL) properties at room and high temperatures of oxide/ nitride/oxide (ONO)-based light emitting capacitors are studied. The ONO multidielectric layer is enriched with silicon by means ...
