Física Aplicada: Recent submissions
Now showing items 21-40 of 554
Comprehensive analysis of MAX phase and MXene materials for advanced photocatalysis, electrocatalysis and adsorption in hydrogen evolution and storage
Over the past twenty-five years, MAX phases and their derivatives, MXenes, have become a focal point in materials research. These compounds seamlessly blend ceramic and metallic properties, offering high thermal and ...
Fast topographic optical imaging using encoded search focal scan
A central quest in optics is to rapidly extract quantitative information from a sample. Existing topographical imaging tools allow non-contact and three-dimensional measurements at the micro and nanoscales and are essential ...
Towards the real-time measurement of Ultrasound Fields by combining Schlieren Tomography and Wavefront Sensing
Recent advances in ultrasound generation such as ultrasonic holography and acoustic tweezers require methods for the fast characterization of pressure fields. Typically, this can be achieved by using a hydrophone, but the ...
Pollutant Concentration Changes During the COVID-19 Lockdown in Barcelona and Surrounding Regions: Modification of Diurnal Cycles and Limited Role of Meteorological Conditions
One of the consequences of the COVID-19 lockdowns has been the modification of the air quality in many cities around the world. This study focuses on the variations in pollutant concentrations and how important meteorological ...
In situ spectroellipsometric study of the nucleation and growth of amorphous silicon
A detailed in situ spectroellipsometric analysis of the nucleation and growth of hydrogenated amorphous silicon (a:Si:H) is presented. Photoelectronic quality a‐Si:H films are deposited by plasma‐enhanced chemical vapor ...
Thin silicon films ranging from amorphous to nanocrystalline obtained by Hot-Wire CVD
In this paper, we have presented results on silicon thin films deposited by hot-wire CVD at low substrate temperatures (200 °C). Films ranging from amorphous to nanocrystalline were obtained by varying the filament temperature ...
Light induced defects in thermal annealed hydrogenated amorphous silicon
The metastable defects of a-Si:H samples annealed at temperatures in the 300-550°C range have been studied by photothermal deflection spectroscopy (PDS). The light-soaked samples show an increase in optical absorption in ...
Reconstruction of Fresnel Holograms using partial wave front information
In this work we analyze the behavior of complex information in Fresnel domain taking into account the limited capability to display complex transmittance values of current liquid crystal devices, when used as holographic ...
3D Shape Control of Printed Micro-Electrodes with Substrate Reshaping
Additive manufacturing (AM) techniques based on liquid precursors, including inkjet printing or laser-induced forward transfer (LIFT), are emerging as the tool-of-choice for the on-demand fabrication of printed electronic ...
Capes primes electrocròmiques de WO3 i conductores iòniques de Ta2O5 obtingudes per polvorització catòdica
Per mitjà de la llum percebem una característica dels objectes molt important: el color. Al llarg de la història s'han investigat mètodes per modificar el color amb què són vistos els materials, ja sigui per motius ...
Use of a spatial light modulator as an adaptable phase mask for wavefront coding
A wavefront-coded imaging system employing a spatial light modulator (SLM) for the agile implementation of phase masks is presented. The SLM is a liquid crystal display that can be modulated to implement cubic phase masks ...
The Theme of Earth Day and the social perception of what is really happening to our planet
Summary. The social perception of information is increasingly diverse and based on sources that in many cases are far removed from the traditional ones. New social mass media have opened the door to a universal 'rumorology,' ...
Vertically aligned carbon nanotubes for microelectrode arrays applications
In this work a methodology to fabricate carbon nanotube based electrodes using plasma enhanced chemical vapour deposition has been explored and defined. The final integrated microelectrode based devices should present ...
A methodology to conduct wind damage field surveys for high-impact weather events of convective origin
Post-event damage assessments are of paramount importance to document the effects of high-impact weather-related events such as floods or strong wind events. Moreover, evaluating the damage and characterizing its extent ...
Reduction of the effect of aberrations in a joint transform correlator
We report the study of the influence of optical aberrations in a joint-transform correlator: The wave aberration of the optical system is computed from data obtained by ray tracing. Three situations are explored: We consider ...
SimpliPyTEM: An open-source Python library and app to simplify transmission electron microscopy and TEM image analysis
Introducing SimpliPyTEM, a Python library and accompanying GUI that simplifies the post-acquisition evaluation of transmission electron microscopy (TEM) images, helping streamline the workflow. After an imaging session, a ...
Epitaxial growth of Y-doped SrZrO3 films on MgO by pulsed laser deposition
Epitaxial thin films of Y¿doped SrZrO3 have been grown on MgO(001) by pulsed laser deposition. The deposition process has been performed at temperatures of 1000¿1200¿°C and at an oxygen pressure of 1.5×10¿1 mbar. The samples ...
Authentication of gold nanoparticle encoded pharmaceutical tablets using polarimetric signatures
The counterfeiting of pharmaceutical products represents concerns for both industry and the safety of the general public. Falsification produces losses to companies and poses health risks for patients. In order to detect ...
Relation between 2D/3D chirality and the appearence of chiroptical effects in real nanostructures.
The optical activity of fabricated metallic nanostructures is investigated by complete polarimetry. While lattices decorated with nanoscale gammadia etched in thin metallic films have been described as two dimensional, ...
Optoelectronic studies in nanocrystalline silicon Schottky diodes obtained by Hot-Wire Chemical Vapour Deposition
The very usual columnar growth of nanocrystalline silicon leads to electronic transport anisotropies. Whereas electrical measurements with coplanar electrodes only provide information about the electronic transport parallel ...
