Materials Literature
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Sinais diversos estão presentes em nosso cotidiano, assim como nas medidas realizadas nas atividades de ciência e tecnologia. Dentre estes sinais, tem grande importância tecnológica aqueles associados à corrosão de estruturas metálicas. Assim, esta tese propõe o estudo de um esquema local de transformada de Fourier ja…
El propósito de este estudio es obtener información sobre las plantas medicinales que tienen mayor uso y comercialización en la población del municipio de León. El objetivo principal ha sido conocer las plantas medicinales utilizadas por la población leonesa en el periodo de julio-diciembre de 2005. Dada la falta de a…
Abstract : During the final program year, the NCSU team completed a surface science study exploring the virgin interfaces in reactive nanolaminates, completed a calorimetry study of three different thermite families, and initiated a Kirkendall-type experiment in Zr-CuO layered structure. Collectively, this learning co…
Phase transitions are collective phenomena, meaning that a large number of atoms or molecules react in a coordinated manner. For nanoscale systems the concept of phases and therefore also the Gibbs phase rule break down. The restricted space in narrow pores prevents the limiting coordination number being reached. Melt…
In nanomaterials, a large fraction of atoms is directly exposed to the surface. Nanochemistry therefore benefits enormously from established experience in surface science. The lower coordination number of atoms at corners, edges and in the middle of surfaces is a direct measure of the degree of unsaturation of these a…
For crystalline porous materials, and for materials of large surface area in general, adsorption of gas and condensation in pores play an important role. First, these phenomena provide an excellent method for the characterisation of the surface area, the pore structure and pore volume of these materials, which are imp…
Electronic structure becomes of interest when orbitals of neighbouring atoms overlap sufficiently to form bands. This is the case in metals and semiconductors where valence electrons are delocalised and explore the entire size of the nanostructure, which leads to quantum size effects. The band gap in semiconductors an…
When electron spins of nanoparticles are ferromagnetically coupled, they normally form a single domain with a large magnetic moment which may have a fixed orientation in the cluster, resulting in hysteresis behaviour in their magnetisation curves. Above the so-called blocking temperature these coupled moments behave l…
Self-assembly is a process in which structural motives provide specific interaction for directed aggregation of the modular building blocks under equilibrium conditions. Interactions among the building blocks but also between building blocks and solvent play a role. This allows the formation of oriented unimolecular l…
There are continuing high hopes in nanotechnology and nanomaterials, but as solid data become available the glorification from previous decades is shifting to more realistic expectations. There is no doubt anymore that in future the new technologies and materials will have a significant impact on our life and that the…
The propagation of the collective surface plasmons, called\nplasmon-polaritons, in infinite equidistant ionic sphere chain has been\nanalyzed. The ideal cancellation of irradiative losses of these ionic\nexcitations in the chain is demonstrated by inclusion of appropriately retarded\nnear-, medium and far-field compon…
Recently, it has become very important to obtain knowledge about interactions between substrates and deposited materials in an atomic scale. In this study, we focused on the interaction between Si substrates and Mn particles, which is thought to be important for the fabrication of diluted magnetic semiconductors in wh…
So far, we have learned that flaws reduce the strength of glass and ceramics to below theoretical values and that residual stress present in those flaws reduces strength even further. Now we will see that time and moisture are the enemies of these brittle materials, further reducing strength. Before getting into that…
The kinetics of elemental inter-diffusion in Ag–Cu nanoalloys of 32–34 atoms around 80:20 composition is theoretically investigated by combining analytic-potential and first-principles calculations. An extremely varied behavior is found, with transformation times ranging from tens of nanoseconds to weeks at room tempe…
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Novos desenvolvimentos da estratégia no conceito Fuel-Slurry Integrated Gasifier / Gas Turbine (FSIG / GT) para geração de potência termoelétrica aplicada ao
The kinetics of elemental inter-diffusion in Ag–Cu nanoalloys of 32–34 atoms around 80:20 composition is theoretically investigated by combining analytic-potential and first-principles calculations. An extremely varied behavior is found, with transformation times ranging from tens of nanoseconds to weeks at room tempe…
1. Non-Fermi liquid and topological states with strong spin-orbit coupling Authors: E-G. Moon, C. Xu, Y. B. Kim, and L. Balents Phys. Rev. Lett. 111, 206401 (2013) 2. Superconductivity on the brink of spin-charge order in doped honeycomb bilayer Authors: O. Vafek, J. M. Murry, and V. Cvetkovic Phys. Rev. Lett. 112, 14…
본 논문에서는 무한 도체 평판의 슬릿 부근에 도체판을 부가하여 슬릿으로 침투하는 전자파의 저감 특성을 검토하였다. 이론 해석에는 FDTD 법을 사용하였으며, 부가 도체판의 형상 및 길이, 간격, 두께의 변화에 따른 침투 전계의 특성을 계산하여 부가 도체판의 구조 변화가 침투 전자파의 저감 특성 및 차폐 효과 특성에 미치는 영향을 고찰하였다. 그 결과, 부가 도체판의 구조 변화에 따라 차폐 효과, 침투 전계의 특성이 변화하는 것을 관찰할 수 있었고, 침투 전계를 최소로 하는 부가 도체판의 최적 구조가 있음을 확인할 수 있었다. This paper presents th…
Transport near a quantum critical point in BaFe2(As1-xPx)2 Authors: James G. Analytis, H-H. Kuo, Ross D. McDonald, Mark Wartenbe, P.M.C. Rourke, N. E. Hussey, and I. R. Fisher Nature Physics 10, 194–197 (2014) Recommended with a commentary by Qimiao Si, Rice University. |View Commentary| DOI: 10.36471/JCCM_July_2014_0…