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Now showing items 91-100 of 156
Enhancing resolution, efficiency, and understanding in IR and THz near-field microscopy
(2018-11-28)
La microscopía óptica de dispersión de campo cercano (s-SNOM) y la espectroscopía de infrarrojo por trsnformada de Fourier (nano-FTIR) resuelta a escala nanométrica son técnicas de caracterización bien establecidas y fiables ...
Relativistic force between fast electrons and planar targets
(IOP Publishing, 2014-07-30)
The full retarded electromagnetic force experienced by swift electrons moving parallel to planar boundaries is revisited, for both metallic and dielectric targets, with special emphasis on the consequences in electron ...
Hydrogen and lithium under high pressure.
(2018-07-06)
In this thesis we present a first-principles analysis of the electronic, vibrational and superconducting properties of solid hydrogen and lithium under high pressure based on density functional theory (DFT). The main goal ...
Injection, transport and manipulation of pure spin currents in metallic lateral spin valves
(2014-12-15)
El trabajo realizado en esta tesis se basa en el uso de válvulas de espín laterales (LSV de las siglas en inglés), las cuales consisten de dos electrodos ferromagnéticos (FM) conectados por un canal no magnético (NM), para ...
Synthesis of macrocyclic poly(ethylene oxide)s containing a protected thiol group: a strategy for decorating gold surfaces with ring polymers
(Royal Society of Chemistry, 2019-12-21)
We introduce an approach to synthesize macrocyclic poly(ethylene oxide)s containing a pendant protected thiol group (pSH-CPEO), which is demonstrated to be able to attach to gold surfaces without prior deprotection. Our ...
Using an Ionic Liquid to Reduce the Electrical Percolation Threshold in Biobased Thermoplastic Polyurethane/Graphene Nanocomposites
(MDPI, 2019-03)
Biobased thermoplastic polyurethane (bTPU)/unmodified graphene (GR) nanocomposites (NCs) were obtained by melt-mixing in a lab-scaled conventional twin-screw extruder. Alternatively, GR was also modified with an ionic ...
Modelling of polymer-carbon nanotube heterojunctions for photovoltaic applications
(2017-01-31)
Semiconducting single-walled carbon nanotubes (s-SWNT) are promising materialsfor efficient organic photovoltaics (OPVs). Unfortunately, the implementation of s-SWNTs has so far not lead to the expected increase in power ...
Contribution to the theoretical description of N2 dynamics on W(100).
(2018-12-10)
Elementary processes at the gas-solid interface are of great interest in many scientific domains. This molecule-surface reactions play a key role in the study of: heterogeneous catalysis processes, plasma-wal interactions ...
Dynamics of diatomic molecules on metal surfaces: O2/Ag(110) and CO/Ru(0001)
(2017-01-25)
This thesis concerns with theoretical modelling from first principles of dynamics of two gas-surface systems (oxygen on silver and carbon monoxide on ruthenium) that are relevant to the heterogeneous catalysis. An accurate ...
Two-color XUV plus NIR femtosecond photoionization of neon in the near-threshold region
(IOP Publishing, 2019-06-28)
Results of angle-resolved electron spectroscopy of near-threshold photoionization of Ne atoms by combined femtosecond extreme ultraviolet and near infrared fields are presented. The dressed-electron spectra show an energetic ...