Encontrados 5 documentos, a visualizar página 1 de 1
Influence of composition, bonding characteristics and microstructure on the ele...
Borges, Joel; Fonseca, C.; Barradas, Nuno P.; Alves, Eduardo; Girardeau, Thierry; Paumier, Fabien; Vaz, F.; Marques, L.Thin films of AlOxNy were deposited by magnetron sputtering in a wide composition range. Different structures and morphologies were observed, depending on the composition and bonding states, which opened the possibility to tailor the properties of this oxynitride system between those of pure Al and those of nitride and oxide films. In a wide range of stoichiometries, one can report the formation of nanocomposit...
Electrical properties of AlNxOy thin films prepared by reactive magnetron sputt...
Borges, Joel; Martin, N.; Barradas, Nuno P.; Alves, E.; Eyidi, D.; Beaufort, Marie France; Riviere, J. P.; Vaz, F.; Marques, L.Direct current magnetron sputtering was used to produce AlNxOy thin films, using an aluminum target, argon and a mixture of N2+O2 (17:3) as reactive gases. The partial pressure of the reactive gas mixture was increased, maintaining the discharge current constant. Within the two identified regimes of the target (metallic and compound), four different tendencies for the deposition rate were found and a morphologi...
Electrical and optical properties of AlNxOy thin films deposited by reactive DC...
Borges, Joel; Martin, Nicolas; Barradas, Nuno; Alves, Eduardo; Eyidi, Dominique; Beaufort, Marie France; Girardeau, Thierry; Paumier, Fabien; Vaz, F.Resumo e poster ; Aluminium, Al, is a metallic material used in a large variety of technological fields, such as surface plasmon-coupled emission (SPCE) devices for biochemical applications and it is also a good candidate to be used as nonresonante plasmonic nanoparticle in thin-film silicon solar cells. Aluminium nitride, AlN, is a semiconductor material and it can be used in the fabrication of optical sensor...
Effects of annealing on the electrical and optical properties of AlNxOy thin films
Borges, Joel; Arvinte, R.; Barradas, Nuno; Alves, Eduardo; Camelio, Sophie; Girardeau, Thierry; Paumier, Fabien; Vaz, F.; Marques, L.Resumo e poster ; Aluminium oxynitride is known to be a ceramic material with high strength and hardness, resulting from a stabilization of alumina (Al2O3) with nitrogen, in a cubic spinel structure, at thermodynamic conditions very different from those found in low plasma temperature deposition processes. Beyond this stable phase of AlNxOy, the available knowledge on this system is still very reduced and the ...
A training algorithm for classification of high-dimensional data
Vieira, Armando; Barradas, NunoWe propose an algorithm for training multi layer preceptrons (MLP) for classification problems, that we named hidden layer learning vector quantization. It consists of applying learning vector quantization to the last hidden layer of a MLP and it gave very successful results on problems containing a large number of correlated inputs. It was applied with excellent results on classification of Rutherford backscat...
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