Materials Literature
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Many applications share a substantial and yet unmet need for prediction and control of interactions between surfaces and proteins or living cells. Examples are blood-contacting biomaterials, biosensors, and non-toxic anti-biofouling coatings for ship hulls. The main focus of this thesis work has been the synthesis, ch…
Terrorists usually target high occupancy iconic and public buildings using vehicle borne incendiary devices in order to claim a maximum number of lives and cause extensive damage to public property. While initial casualties are due to direct shock by the explosion, collapse of structural elements may extensively incre…
Titanium alloys and CFRP structure parts are more en more used in aerospace and aircraft industries. They have an excellent combination of strength and fracture toughness as well as low density. Now in most case, theses work materials are stacked and have to be drill in one shot operation during the assembly operation…
Evaluation of the wet etching properties of several different thin film oxidesgrown by physical vapour deposition was performed in this work. MgO, Al2O3,SiO2, TiO2, HfO2 ZrO2 and Y2O3 were coated on two types of substrates; Si andborosilicate glass and etching tests were performed in different etchingsolutions. MgF2 t…
In Indirect Field Orientation (IFO) of induction motors, the interest for parameters identification has increased rapidly due to the great demand for high performance drives and more sophisticated control systems that have been made possible by the development of very powerful processors, such as floating point DSPs.…
One-dimensional ZnO nanostructures have great potential applications in the fields of optoelectronic and sensor devices. Therefore, it is very important to realize the controllable growth of one-dimensional ZnO nanostructures and investigate their properties. The main points for this thesis are not only to successfull…
This dissertation explores quantitative two-photon absorption spectroscopy to relate molecular structure with optical properties of organic chromophores. The dissertation describes an advanced fluorescence-based technique for reliable measurements of the two-photon spectra and cross sections. To facilitate the measure…
Triggered by the recent popularity of advanced high strength steels (AHSS) and aluminium alloys for weight-reduction in automotive components, industrial interest in deformation-induced ductile damage in sheet metal is increasing in the last decades. Severe deformation during forming or service triggers different dama…
In partial fulfillment of the requirements for the degree of Doctor of Philosophy in Nanotechnologies and Nanosciences by Universidade Nova de Lisboa Faculdade de Ciências e Tecnologia
Ce travail de these s’inscrit dans le cadre d’un projet de recherche partenariale, dedie a l’utilisation de materiaux composites dans la construction navale par une approche basee sur l’ingenierie de la securite incendie. La motivation de ce travail a ete de verifier, de caracteriser et de modeliser le comportement au…
After initial report of its potential use for flexible/large area electronics, amorphous In-Ga-Zn-O (a-IGZO) is now emerging worldwide as a new semiconductor for next gen-eration thin-film transistor (TFT) flat panel displays and imagers. This dissertation work examines in detail the basic properties and physics of th…
It is feasible to realize full-color holographic display based on liquid crystal spatial light modulator by use of multi-wavelength illumination combined with time division multiplexing (TDM) or space division multiplexing (SDM). However, the modulation characteristics of liquid crystal spatial light modulator (LC-SLM…
It is believed that proton–exchange membrane fuel cells (PEMFCs) are going to be exploited as power generation devices for stationary, automotive, and portable applications in the near future because of their high performance and environmental friendliness. Up to the present, wide spread utilization of PEMFCs is not v…
A general constitutive framework is proposed to incorporate linear and nonlinear mechanical behaviour laws (i.g. elastoviscoplasticity) into a standard phase field model. A finite element formulation of a coupled phase field/diffusion/mechanical problem for alloys is proposed within the general framework of continuum…
An increased demand for hydrogen as energy-carrier and as fuel for clean power generation is expected during the 21st century. The Kyoto-protocol states that the world has to decrease it’s CO2-emissions to the atmosphere. A concept combining hydrogen production and sequestration of CO2 is the sorption enhanced steam m…
Conducting polymers (CP) have received great attention in both academic and industrial areas in recent years. They exhibit unique characteristics (electrical conductivity, solution processability, light weight and flexibility) which make them promising candidates for being used in many electronic applications. Recentl…
Significance and Use This test method is based on the penetration of a specific type of indentor when forced into the material under specified conditions. The indentation hardness is inversely related to the penetration and is dependent on the elastic mod
The structure of amorphous silicon (a-Si) has attracted wide interest over the recent decades. This substantial interest is twofold. Firstly, a-Si has many, highly significant, technological applications. Secondly, physically it is a fundamentally interesting material which has been regarded as a model system of a cov…
It has recently become clear that simulations under amorphous boundary conditions (ABCs) can provide valuable information on the dynamics and thermodynamics of disordered systems with no obvious order parameter. In particular, they allow the detection of a correlation length that is not measurable with standard correl…
In der vorliegenden Arbeit wurden Verpackungsmaterialien entwickelt und charakterisiert, die Sauerstoff chemisch binden und ggf. seine Anwesenheit anzeigen konnen. Systeme, die beide Funktionen erfullen, konnten auf Basis von Metallen und von hydrochinoiden Verbindungen hergestellt werden. Die Systeme wurden durch Ext…