Materials Literature
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Telah dilakukan proses pemurnian bahan pasir untuk meningkatkan kandungan Fe2O3 sebagai bahan baku dalam pembuatan magnet permanent Barium Ferrit. Pasir besi yang digunakan ada dua jenis, yaitu pasir dengan kandungan awal Fe2O3 sebesar 60,64% dan pasir dengan kandungan awal Fe2O3 sebesar 58,39%. Proses hydrothermal ok…
The increasing concern with the sustainable development ally with a bigger awareness with regard to the preservation of the environment has stinulated research in the most diverses areas of environmental correct technologies. Inside of this context the cold plasma technology represents an efficient, clean and economic…
Die Herstellung definierter und stabiler Anordnungen von Nanopartikeln ist in magnetischen Speichermedien, in der Biosensorik oder in optoelektronischen Bauteilen von besonderem Interesse. Dabei spielt die Selbstorganisation der Nanopartikel in 2D- und 3D-Strukturen eine entscheidende Rolle. In Hinblick auf die Produk…
Cantilevered reinforced concrete columns with a lap splice of the longitudinal\nreinforcement near the base can induce high moment demands on the splice region when\nlateral loads are present on the structure. Code design specifications typically require a\nconservative splice length to account for these high moment d…
Arterial endothelial cells (ECs) are subjected to pulsatile strain due to pressure\nchanges in the cardiac cycle and this may play a significant role in vascular function in\nhealth and disease. Further, ECs differentially respond to different patterns of strain.\nThere is much evidence that cyclic uniaxial strain res…
A molecular-level understanding of a heterogeneous catalytic reaction is the key\ngoal of heterogeneous catalysis. A surface science approach enables the realization of\nthis goal. However, the working conditions (ultrahigh vacuum (UHV) conditions) of\ntraditional surface science techniques restrict the investigations…
Three laboratory studies were performed to elucidate the influence of soil\ntexture, pH, and cation exchange capacity (CEC) on the concentration of ferrous Fe in\nsoil solution and the resulting expression of soil redoximorphic features. The objectives\nwere: 1) assess the buffering effects of CEC on ferrous Fe concen…
The molecular recognition of fluoride and cyanide anions has become an\nincreasingly pertinent objective in research due to the toxicity associated with these\nanions, as well as their widespread use. Fluoride is commonly added to drinking water\nand toothpastes to promote dental health, and often used in the treatmen…
A recently developed chemical vapor deposition (CVD) synthesis process called CoMoCAT yields single-wall carbon nanotubes (SWCNT)s of controlled diameter and chirality, making them extremely attractive for technological applications. In this dissertation, we use molecular dynamics simulations and density functional th…
Advancements in the semiconductor industry require new materials with\nimproved performance. With the introduction of copper as the interconnect material for\nintegrated circuits, efficient diffusion barriers are required to prevent the diffusion of\ncopper into silicon, which is primarily through grain boundaries. Th…
Ion irradiation of carbon nanotubes is a tool that can be used to achieve modification of the structure. Irradiation stability of carbon nanotubes was studied by ion and electron bombardment of the samples. Different ion species at various energies were used in experiments, and several defect characterization techniqu…
To interpret the data from spaceborn lidar measurements, one must have a basic\nunderstanding of the backscattering of oriented ice particles. The conventional raytracing\nmethod is not applicable to the scattering of light by oriented particles. In this\nstudy, the dipole approximation (DDA) method is employed to the…
A data weighting method derived from analysis of the distillation column design relation(s) is used on several experimental vapor−liquid equilibrium (VLE) sets of data for estimating the interaction pair parameters of two local-composition models (NRTL and Wilson). It is shown that process equations can provide insigh…
Abstract This work describes the development of a toughness scaling methodology incorporating the effects of weld strength mismatch on crack-tip driving forces. The approach adopts a nondimensional Weibull stress, σ¯w, as a the near-tip driving force to correlate cleavage fracture across cracked weld configurations wi…
The title complexes, [Co(C(5)H(9)N)(3)(C(21)H(21)O(3)P)(2)]ClO(4).2CH(2)Cl(2), (I), and [Co(C(5)H(9)N)(3)(C(21)H(21)O(3)P)(2)](ClO(4))(2).2CH(2)Cl(2), (II), respectively, crystallize in the hexagonal space group P6(3)/m and the monoclinic space group P2(1)/n, respectively. The cation of complex (I) has D(3h) site symm…
Abstract The application of nanostructured porous alumina templates as a solid support in biomedical assays requires a surface biofunctionalization process that has been addressed in this work by an hybrid aminopropyl‐triethoxysilane/tetraisopropyl‐orthotitanate (APTS/ TIPT) self assembled film. The nanostructured por…
O desenvolvimento de tecnologias limpas e eficientes que possam substituir os tratamentos tradicionais de modificacao de superficie de materiais em processos que envolvam adesao constitui uma ativa area de pesquisa. O plasma contitui uma importante alternativa para alcancar este objetivo. No presente trabalho apresent…
The recent experimental evidence in favor of stripe ordering in ferropnictides [Chuang {\it et. al.}, Science {\bf 327},181 (2010)] points to the new field of study for strongly correlated systems. Here we argue that due to the smallness of the chemical potential in ferropnictides the effects of stripe modulation are…
For a bottom-up approach, the catalysed growth of nanowires opens the way for numerous applications: vertical nano-transistors with a surrounding gate, core-shell heterostructures and so on... With these new devices, new questions emerge concerning catalyst or surface influences on the nanowire electronic properties.…
Programa detallado de la clase de física elemental: mecánica, hidrostática, de los gases, acústica, calórico, óptica, magnetismo, electricidad