Enginyeria Electrònica i Biomèdica: Recent submissions
Now showing items 401-420 of 787
Double stent-retriever as the first-line approach in mechanical thrombectomy: a randomized in vitro evaluation
Background A repeated number of passes during mechanical thrombectomy leads to worse clinical outcomes in acute ischemic stroke. Initial experiences with the simultaneous double stent-retriever (double-SR) technique as the ...
Anomalous optical and electrical recovery process of photoquenched EL2 defect produced by oxygen and boron ion implantation in gallium arsenide
The optical and electrical recovery processes of the metastable state of the EL2 defect artificially created in n‐type GaAs by boron or oxygen implantation are analyzed at 80 K using optical isothermal transient spectroscopy. ...
Lighteligence. Second prototype report
Projecte LIGHTELLIGENCE (AGAUR 2010) dut a terme a la Fundació Institut de Recerca en Energia de Catalunya (IREC)
Suboptimal filtering and nonlinear time scale transformation for the analysis of multiexponential decays
Multiexponential decays may contain time-constants differing in several orders of magnitudes. In such cases, uniform sampling results in very long records featuring a high degree of oversampling at the final part of the ...
Copropagating pump and probe experiments on Si-nc in SiO2 rib waveguides doped with Er: The optical role of non-emitting ions
We present a study that demonstrates the limits for achieving net optical gain in an optimized waveguide where Si nanoclusters in SiO2 codoped with Er3+ are the active material. By cross correlating absorption losses ...
Finite Element Analysis of Electrically Excited Quartz Tuning Fork Devices
Quartz Tuning Fork (QTF)-based Scanning Probe Microscopy (SPM) is an important field of research. A suitable model for the QTF is important to obtain quantitative measurements with these devices. Analytical models have the ...
Energetics and carrier transport in doped Si/SiO2 quantum dots
In the present theoretical work we have considered impurities, either boron or phosphorous, located at different substitutional sites in silicon quantum dots (Si-QDs) with diameters around 1.5 nm, embedded in a SiO2 matrix. ...
Self-heating effects in large arrangements of randomly oriented carbon nanofibers: Application to gas sensors
Herein, we prove that self-heating effects occur in sensor films made of randomly oriented nanoparticles (electro-sprayed, drop-casted and paint-brushed films of carbon nanofibers). A 2-point calibration method, reliable ...
Role of aluminum and HMTA in the hydrothermal synthesis of two-dimensional n-doped ZnO nanosheets
This work reports the study of the processes behind the growth of two-dimensional (2D) n-doped ZnO nanostructures on an AlN layer. We have demonstrated that AlN undergoes a slow dissociation process due to the basic ...
Formaldehyde sensing mechanism of SnO2 nanowires grown on-chip by sputtering techniques
Tin dioxide nanowires have been grown by thermal oxidation of sputtered thin films by means of a VLS method. A tin sputtered layer catalyzed by gold nanoparticles, acts as material seed for the localized growth of NWs ...
Combined dielectrophoretic and impedance system for on-chip controlled bacteria concentration: Application to Escherichia coli
The present paper reports a bacteria autonomous controlled concentrator prototype with a user-friendly interface for bench-top applications. It is based on a micro-fluidic lab-on-a-chip and its associated custom instrumentation, ...
Reliable Characterization of Organic & Pharmaceutical Compounds with High Resolution Monochromated EEL Spectroscopy
Organic and biological compounds (especially those related to the pharmaceutical industry) have always been of great interest for researchers due to their importance for the development of new drugs to diagnose, cure, treat ...
Modificacion de las propiedades opticas y mecanicas de polimeros mediante implantacion ionica
En el presente trabajo se estudian los efectos introducidos por la implantación de Nitrógeno atómico y Silicio sobre probetas de policarbonato empleadas para usos ópticos. Distintas dosis de Nitrógeno y Silicio fueron ...
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. ...
