Universitat de Barcelona
Now showing items 65-84 of 100
Biosensors are nowadays a powerful tool to enable the detection of specific biological interactions and to evaluate the concentration dependence in the response. A biosensor usually consists of three different parts: the ...
In this thesis we have presented a thorough study on the optical and sensoristic properties of SRSN Mu-disks, in an isolated configuration and when coupled to a passive Si3N4 waveguide placed underneath. The whole ...
Dentro del amplísimo campo de los sensores, están emergiendo con gran fuerza los dispositivos basados en tecnología de silicio. El uso de la tecnología microelectrónica para la producción de sensores permite obtener ...
En la primera parte de este trabajo se analizan diferentes técnicas experimentales tales como la Fotoluminiscencia (PL); Absorción Óptica (AO); Fotoexcitación de la Luminiscencia (PLE) Admitancia, que hemos utilizado para ...
Nanomaterials have received increasing attention during the last decades in the solid state field since they play a major role as catalyst and catalyst supports for many applications including fuel cells or gas sensors. ...
This thesis is devoted to the study of the interactions of phonons in indium nitride (InN) and materials of the (In,Ga)N system with wurtzite structure. For this purpose, we present Raman spectroscopy on nanowires (NWs), ...
Cu2ZnSn(S,Se)4 (CZTSSe) kesterite semiconductors have been proposed as a potential medium to long term replacement of Cu(In,Ga)(S,Se)2 (CIGS) chalcopyrites for sustainable cost-efficient thin film technologies compatible ...
This thesis explores the analytical capabilities of low-loss electron energy loss spectroscopy (EELS), applied to disentangle the intimate configuration of advanced semiconductor heterostructures. Modern aberration corrected ...
The main objective of this thesis is the development of Raman scattering based methodologies for the analysis of advanced electrodeposition-based CIGS technologies, with the identification and characterization of parameters ...
This thesis presents experimental work on developing rare-earth ions and Si nanostructures as a material platform for light emitting devices (LEDs) in the visible and near-infrared range. The realization of the different ...
This thesis presents the work carried out towards the implementation of RE-doped Si-based light emitting devices as integrated optoelectronic building blocks for Silicon Photonics. This work spans from the fundamentals ...
Wireless sensor network is one of the most important topics in the current data transferring. In fact regarding to data gathering and transformation, cost effective is the top topic and optimum point, which every vendors ...
The high quality CuxS nanocrystals were synthesized (Chapter 3) and the profound understanding and skills to prepare colloidal nanocrystals has been obtained and improved. It revealed a very simple synthetic route not only ...
Due to recent progress, higher-order chemical instrumentation provides large amounts of data which need automated processing in order to extract relevant information. In most cases, the raw signals or spectra are too complex ...
During the last decades, silicon nanocrystals have focused great attention due to the size-dependent physical properties they present, attributed to the quantum confinement effect. This, added to the bulk silicon compatibility ...
En esta memoria se recogen los resultados sobre preparación y caracterización de las propiedades físicas de sistemas magnéticos nanoestructurados. Para la fabricación de las nanoestructuras se han empleado dos estrategias ...
La tesi s’engloba en un context energètic en el que les tendències actuals del subministrament i el consum d’energia són clarament insostenibles. No és exagerat dir que el futur de la prosperitat de la humanitat depèn de ...
Aquest treball es va iniciar amb la intenció de millorar les propietats sensores d'alguns òxids metàl·lics tan a partir del control del creixement dels cristalls en el cas de capes fines, com en l'augment de la superfície ...
En éste trabajo de Tesis se presentan los resultados más relevantes obtenidos en el desarrollo de capas buffer de CdS y de capas buffer libres de cadmio (sulfuro de indio y sulfuro de zinc) preparadas mediante la técnica ...
This PhD thesis introduces basic concepts of smart chemical sensors design, which are afterwards applied to a particular application: the analysis of natural gas. The thesis addresses thus two sets of objective, a first ...
