IMPROVEMENT OF BULK HETEROJUNCTION SOLAR CELLS TROUGH AU ION IMPLANTATION INTO PEDOT:PSS LAYER
To my parents, Sandra and Martín, and my two siblings, Derian and Ailyn, for their infinite encouragement and support.To my journey'
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Povrchové a mechanické vlastnosti tenkých vrstev
Dizertačná práca sa zaoberá štúdiom morfológie a mechanických vlastností tenkých vrstiev plazmových polymérov na bázi tetravinylsilánu a jeho zmesí s kyslíkom a argónom. Vrstvy boli pripravené na substrátoch z kremíku a skla pomocou metódy plazmochemickej depozície z plynnej fázy. Mikroskopia atomárnych síl bola použi…
Izvedba sklopa i mjerenje struje prilikom uklapanja transformatora u trenutku prolaska mrežnog napona kroz nulu
Transformers at power on the network can rip current energization which is significantly higher than the rated current of the transformer. Size current energization depends on the time of inclusion and of the remanent magnetism in the core. The currents that occur when you turn on the transformer to the network can so…
Elaboration de matériaux polymères issus de ressources renouvelables
L'epuisement progressif des ressources fossiles a entraine ces dernieres annees un transfert d'interet des materiaux synthetiques vers les materiaux issus de ressources renouvelables. Ces derniers peuvent etre elabores a partir de polymeres et/ou de synthons presents dans la biomasse. Dans ce contexte, la synthese de…
Study of exposure and energy absorption buildup factor for some building materials available in Iraq
Exposure buildup factor (EBF) and energy absorption buildup factor (EABF) for some building materials (cement, clay brick, thermiston, gypsum and ordinary concrete) available in Iraq at the photon energy range 0.015-15.0 MeV up to penetration depth 40 mfp has been calculated using five parameter geometric progression…
Superconductive Ultra-compact Magnetically Coupled Resonator with Twin-spiral Structure
We describe a practical design of an ultra-compact on-chip superconductive micro-resonator as a potential magnetic element of metamaterial. The achieved resonator size with respect to the wavelength in our experiment is about λ/ 14400. The resonator consists of two superconducting Nb spirals, sandwiched face to face,…
Sifat elektrik dan termal nanokomposit poly(vinyl chloride) (PVC)/low density polyethylene (LDPE)
One of the most serious problems encountered in poly(vinyl chloride) (PVC) processing is due to low thermal stability of the PVC. The purpose of the study was to determine the effect of LDPE and flame retardant on to the electrical and thermal nanocomposites properties The nanocomposites were prepared using a laboplas…
Desenvolvimento de micropartículas estruturadas contendo curcumina
A curcumina e um corante natural amarelo – alaranjado extraido do rizoma da Curcuma longa. Trata-se de um polifenol com importantes efeitos biologicos comprovados por estudos cientificos, atuando como um potente antioxidante, inibindo a formacao de celulas cancerigenas, alem de possuir efeito antiinflamatorio. O empre…
Chapter 8: Numerical Methods for Evolution Problems
8.1 ▪ A Unified Numerical Approach for the Nonlinear Schrödinger Equations 8.1.1 ▪ Introduction A new method for analyzing boundary-value problems for both linear and integrable nonlinear partial differential equations (PDEs) was introduced by Fokas in [1] and extended by several authors; see [2]. This method is usual…
Passive Fuel Tank for DMFC with Carbon Capture
An innovative new fuel tank was tested using a Direct Methanol Fuel Cell (DMFC). The aim of the fuel tank was to provide a fuel supply to the cell in all orientations while simultaneously capturing the carbon dioxide produced by the system in order to maintain a positive fuel pressure at all times.
Synthèse et caractérisation de copolymères amphiphiles à base de poly(acide lactique) et de poly(éthylène glycol) pour la délivrance de principes actifs
The objective of this work was to synthesize and characterize amphiphilic copolymers based on poly(ethylene glycol) (PEG) and poly(lactic acid) (PLA) intended for drug delivery applications. The polymers were chosen regarding to their biocompatibility and bioresorbability. Different architectures of amphiphilic copoly…
Pt and Pt-Ru Based Catalyst for DMFC
Direct Methanol Fuel Cells have been a promising source of alternative energy as the supply of conventional fuels is slowly being diminished. At the heart of this electrochemical cell a Proton Exchange Membrane laced with a Pt and Pt-Ru catalyst creating a redox reaction. The mechanical properties and composition of t…
Compréhension des mécanismes d'endommagement de l'interface textile-caoutchouc
Les courroies etudiees subissent des sollicitations mecaniques complexes et des variations thermiques jusqu’a 160°C. Pour ameliorer leurs durees de vie, les proprietes de l’interface entre le câble PA 4,6 adherise RFL et la matrice EPDM doivent etre optimisees. Dans ces travaux, les courroies ont subi un endommagement…
Optimisation de la fabrication par carbothermie de carbure d'uranium à teneur en oxygène maitrisée
Mixed carbides (U, Pu)C, are good fuel candidate for IVth generation reactors because of their high fissile atoms density and excellent thermal properties for economical (more compact and efficient cores) and safety reasons (high melting margin). UC can be imagine as a surrogate material ror R&D studies on (U,Pu)C fue…
Correction to “Transport of Triplet Excitons along Continuous 100 nm Polyfluorene Chains”
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionCorrection to "Transport of Triplet Excitons along Continuous 100 nm Polyfluorene Chains"Xiang Li, Matthew Bird, Gina Mauro, Sadayuki Asaoka, Andrew R. Cook, Hung-Cheng Chen, and John R. Miller*Cite this: J. Phys. Chem. C 20…
Controlling the state of dynamic proteins
Protein Evolution Small molecules that change the oligomeric state of proteins by binding to a site distant from the interface are called allosteric. They often act by taking advantage of intrinsic protein dynamics and stabilizing a particular conformation of the protein. Perica et al. show that
Dispersing catalytic gold as widely as possible
Catalysis In order to maximize the activity of precious metals in catalysis, it is important to place the metal on some support with a high surface area (such as a zeolite) and to maintain the metal as small clusters or even atoms to expose as much metal as possible. The latter goal is more readily achieved with oxide…
Nanoparticle growth starts at the edges
Nanomaterials The high activity of precious metals such as platinum for reactions that occur in fuel cells can be enhanced by alloying with metals such as nickel and cobalt to form shaped nanoparticles, where platinum is concentrated at the corner and edge sites. Gan et al. used a combination of high-resolution imagin…
A phenomenological constitutive model of characterization for the heating and cooling transformations process of nickel-titanium wires using Datastudio 1.9.8
This paper presents a three-dimensional constitutive model for a shape-memory alloy that generalizes the behaviour of Nickel-Titanium transformation whilst subjected to heat, then cooling processes. This model is able to predict the behaviour of Shape Memory Alloys (SMAs) wires under complex thermo-mechanical loadings…
Falsa torção de poliéster: a influência da relação D/Y e configuração dos discos do agregado de texturização nos parâmetros de EKB de fios texturizados convencionais
obtenção do título de Mestre.