Materials Literature
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In this review, the nanobiohybrids formed by DNA/RNA and single-walled carbon nanotubes (SWNTs) have been considered focusing on the structures of the hybrids and the interaction energy between components. It discusses the influence of the polymer type, base sequence, oligomer length, polymer flexibility, and nanotube…
L’emergence du concept du developpement durable a fait que l’impact des materiaux polymeres sur l’environnement devienne une question pregnante et a conduit a se pencher sur les polymeres bio-sources et biodegradables. [1] Le present travail a pour objectif d’elaborer des materiaux polymeres fonctionnels a base de pol…
Проведено аналіз динаміки зміни концентрації радіоактивних аерозолів під час вилучення паливовміщуючих матеріалів (ПВМ) та інших радіоактивних відходів з об’єкта «Укриття» з урахуванням системи вентиляції нового безпечного конфайнменту (НБК). Показано, що в разі вилучення за зміну двох контейнерів з ПВМ об’ємом 3 м3 к…
Synthesis, structure, and thermal and mechanical properties of hybrids and blends of inorganic polymers, such as boron oxides, phosphates, sulfophosphates, and fluorophosphates with organic thermoplastics, were investigated and analyzed. The use of these hybrids presents a very promising line in the development of pol…
The problem on determination of the dynamical stress intensity factors for a crack of the shape of three-segment broken line is solved. The crack is located in an infinite elastic medium in which the longitudinal shear harmonic waves are propagated. The initial problem is reduced to a system of three singular integro-…
The topic of this Philosophy Doctor Thesis tallies with the national project MAT2012 of the BBT group of UPC: "Pore4Bone: Biomimetic calcium phosphates: tailoring porosity from the nano- to the macroscale for osteoinduction, drug delivery and bone tissue engineering". Bone is one of the most transplanted tissues globa…
The concrete surface layer is often referred to as its “skin.” According to Kreijger (1984), three types of concrete skin can be defined: the cement skin (about 0.1 mm thick), the mortar skin (about 5 mm thick), and the concrete skin (about 30 mm thick), as a result of the wall effect, sedimentation and segregation, c…
Many biological and technological complex fluids exhibit tight microstructural alignment that confers them nematic mechanical properties. Among these we count liquid crystals and biopolymer networks, which are often available in microscopic amounts. However, current microrheological methods cannot measure the directio…
When a drop impacts a thin fiber, a critical impact speed can be defined, below which the drop is entirely captured by the fiber, and above which the drop pinches-off and fractures. We discuss here the capture dynamics of both inviscid and viscous drops on flexible fibers free to deform following impact. We characteri…
Vision in humans is made possible by a light-sensing sheet of cells at the back of the eye called the retina. The surface of the retina is populated by specialized sensory cells, known as rods and cones. The rod cells detect very dim light, while the cones are less sensitive to light but are used to detect color. Toge…
We report neutron scattering experiments which reveal a large spin gap in the magnetic excitation spectrum of weakly-monoclinic double perovskite Sr2ScOsO6. The spin gap is demonstrative of appreciable spin-orbit-induced anisotropy, despite nominally orbitally-quenched 5d3 Os5+ ions. The system is successfully modeled…
The elemental two-dimensional (2D) materials such as graphene, silicene, germanene, and black phosphorus have attracted considerable attention due to their fascinating physical properties. Structurally they possess the honeycomb or distorted honeycomb lattices, which are composed of six-atom rings. Here we find a new…
We describe a microscope-based optical setup that allows us to perform space-and time-resolved measurements of the spectral reflectance of transparent substrates coated with ultrathin films. This technique is applied to investigate the behavior in water of thermosensitive polymer brushes made of poly(N-isopropylacryla…
We theoretically propose that magnetic skyrmion, nanometric spin vortex characterized by a quantized topological number, can be electrically created on a thin-film specimen of chiral-lattice magnetic insulator within a few nanoseconds by applying an electric field via an electrode tip taking advantage of coupling betw…
The mathematical model to study the processes of creep-fatigue cracks propagation in plates under block loading is formulated. The effect of the blocks loading shape on the life-time of structural elements is investigated. The subcritical growth of creep-fatigue cracks in thin-walled structural elements is determined.…
Ces travaux de thèse portent sur le développement d'un revêtement multifonctionnel issu de la voie sol-gel pour la protection anticorrosion et anti-usure de pièces de pompes. Le matériau d'étude est un acier laminé non allié DC04, très sensible à la corrosion et de topographie irrégulière. Il a été démontré la faisabi…
Contact interaction between two elastic semi-infinite bodies in the presence of a real gas in interface gaps, which are caused by a periodic array of grooves on the surface of one of the bodies, is modeled. The gas state is described by the van der Waals equation that makes possible to take into account the phase tran…
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Motivated by contaminant remediation, we study the volume of oil (oleic acid) removed from a liquid lens by a falling particle. When a spherical particle is dropped from a fixed height into an oil lens that floats on top of a water surface, a portion of the oil adheres to the sphere. Once the sphere comes to rest at t…
We examine the deformation produced by microdroplets atop thin elastomeric and glassy free-standing films. Because of the Laplace pressure, the droplets deform the elastic membrane thereby forming a bulge. Thus, two angles define the droplet or membrane geometry: the angles the deformed bulge and the liquid surface ma…