Enginyeria Electrònica i Biomèdica: Recent submissions
Now showing items 381-400 of 781
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 ...
Measurement of the ratio of branching fractions B(B0→K*0γ)/B(B0s→ϕγ)
The ratio of branching fractions of the radiative B decays B 0 → K * 0 γ and B 0 s → ϕ γ has been measured using 0.37 fb − 1 of p p collisions at a center of mass energy of √ s = 7 TeV , collected by the LHCb ...
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 ...
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 ...
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 ...
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 ...
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 ...
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) ...
ChipScope Symposium: Novel Approaches for a Chip-Sized Optical Microscope
In the Chipscope project funded by the EU, a completely new strategy towards optical microscopy is explored by a team of researchers from different European institutions. In this workshop, the different researchers of the ...
Untangling electrostatic and strain effects on the polarization of ferroelectric superlattices
The polarization of ferroelectric superlattices is determined by both electrical boundary conditions at the ferroelectric/paraelectric interfaces and lattice strain. The combined influence of both factors offers new ...
NH3 sensing with self-assembled ZnO-nanowire μHP sensors in isothermal and temperature-pulsed mode
Dielectrophoretic alignment is found to be a simple and efficient method to deposit the solution prepared ZnO nanowires onto micro hot plate substrates. Due to the strong surface effects, positive temperature coefficient ...
A Compact raster lensless microscope based on a microdisplay
Lensless microscopy requires the simplest possible configuration, as it uses only a light source, the sample and an image sensor. The smallest practical microscope is demonstrated here. In contrast to standard lensless ...
Nonlinear inverse dynamic models of gas sensing systems based on chemical sensor arrays for quantitative measurements
Gas sensing systems based on low-cost chemical sensor arrays are gaining interest for the analysis of multicomponent gas mixtures. These sensors show different problems, e.g., nonlinearities and slow time-response, which ...
Nano-Illumination Microscopy: a technique based on scanning with an array of individually addressable nanoLEDs
In lensless microscopy, spatial resolution is usually provided by the pixel density of current digital cameras, which are reaching a hard-to-surpass pixel size / resolution limit over 1 μm. As an alternative, the dependence ...
Electrical properties of individual tin oxide nanowires contacted to platinum electrodes
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. ...
EEL spectroscopic tomography: Towards a new dimension in nanomaterials analysis
Electron tomography is a widely spread technique for recovering the three dimensional (3D) shape of nanostructured materials. Using a spectroscopic signal to achieve a reconstruction adds a fourth chemical dimension to the ...
Electroluminiscence and optical amplification in silicon nanostructures: towards the integration of electronics and photonics
This line of research of my group intends to establish a Silicon technological platform in the field of photonics allowing the development of a wide set of applications. Particularly, what is still lacking in Silicon ...
Defectes en capes epitaxials d'arseniür de gal.li sobre silici
Un dels principals objectius de la recerca en electrònica és millorar les prestacions de velocitat dels equips. Als circuits basats en dispositius fabricats amb silici, l'augment de la velocitat de funcionament s'ha ...
Characterization of linear-mode avalanche photodiodes in standard CMOS
Linear-mode Avalanche PhotoDiodes (APDs) can be fabricated in standard CMOS processes for obtaining high multiplication gains that allow to determine the number of incident photons with great precision. This idea can be ...
