Materials Literature
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Zirconium tin titanate (Zr, Sn)TiO4 (ZST) thin films have been deposited at ambient temperature by dc magnetron sputtering from individual titanium, zirconium and tin metal targets on platinized silicon substrates. The present study demonstrates the possibility of growing zirconium tin titanium oxide films in 100% pur…
Abstract The title compound is prepared by solid state reaction of BaCO3, Fe2O3, and CaCO3 (Ar, 1250 °C, 80 h).
Abstract Review: 42 refs.
apoio financeiro.Aos colegas de laboratório que diretamente ou indiretamente colaboraram para a execução deste trabalho e que involuntariamente foram omitidos.A DEUS que torna tudo isto possível.
L‟objectif de cette étude comme nous l‟avions défini dans l‟introduction était de préparer et d‟étudier des catalyseurs à base d‟or actifs et sélectifs pour l‟hydrogénation sélective du crotonaldéhyde. Les résultats de la caractérisation montrent que la préparation des catalyseurs monométalliques à base d‟or par DPU s…
以单氨基卟啉作为引发剂,引发L-谷氨酸-γ-十八烷酯N-羧基内酸酐（SLGNCA）开环聚合合成卟啉化聚（L-谷氨酸-γ-十八烷酯）（PSLG）,进一步通过静电纺丝制备其纤维膜.相比于自由氨基卟啉,金属氨基卟啉尤其是钴氨基卟啉引发得到的PSLG具有更高的分子量.紫外-可见光谱和荧光光谱研究表明,卟啉化PSLG依然具有卟啉独特的光谱性能,静电纺后可以制备具有均匀红色荧光的微米级纤维.
We investigated the effect of dissolved hydrogen on the microstructure evolution of nanocrystalline silicon. Through molecular dynamics simulations we characterize the local and overall structural features of several hydrogenated samples by the quantitative calculation of their crystallinity. We prove that hydrogen in…
以双酚A（BPA）,碳酸乙二酯（EC）和碳酸二甲酯（DMC）为原料,制备双酚A二元醇（Ⅰ）和双酚A碳酸酯（Ⅱ）,并用红外光谱与核磁共振波谱对其结构进行表征.通过Ⅰ与Ⅱ的共缩聚反应及Ⅱ的自聚实现了主链中含有—CH2CH2—单元的双酚A型聚碳酸酯（PC）的非光气法合成,用凝胶渗透色谱法（GPC）和TGA-DSC对PC的分子量和热性质进行分析.结果表明,Ⅱ在240℃自聚6h后产物的Mn可达17.6×103,主链中—CH2CH2—单元的引入,可以降低聚合物的Tg,提高其结晶性,所得聚合物具有良好的热稳定性.
We experimentally demonstrate high Quality factor dual-polarized TE-TM photonic crystal nanobeam cavities. The free-standing nanobeams are fabricated in a 500 nm thick silicon layer, and are probed using both tapered optical fiber and free-space resonant scattering set-ups. We measure Q-factors greater than 10^4 for b…
Dense and hydrophobic organic hybrid films were deposited on the surface of aluminum tubes by the method of chemical immersion.Corrosion resistance of hybrid films was examined by bluestone drips,hydrogen evolution and copper accelerated salt spray tests,and the results show that the hybrid film significantly increase…
O presente trabalho descreve o preparo, a caracterização e o uso de eletrodo modificado com polímero de azul de metileno (PMB) imobilizado sobre a superfície de eletrodo de carbono vítreo (GCE-PMB) na análise do herbicida glifosato.O método utilizado para a preparação dos filmes do PMB foi a eletropolimerização.Os fil…
We have developed a novel technique based on the selective desorption of an oxide film in order to grow ordered arrays of silicon carbide nanocrystals on a silicon surface. These nanocrystals form as a byproduct of void nucleation in the oxide during the high-temperature vacuum annealing of silicon, a process which no…
The critical behavior of the three-dimensional n -vector model in the presence of an external field is investigated. The mathematical description is performed with the collective variables method in the framework of the ρ 4 model approximation at the microscopic level without any adjustable parameters. The recurrence…
We reveal by first-principles calculations that in iron pnictides Sr4M2O6CrFeAs2 (M=Sc, Cr) the two-dimensional CrFeAs2 layers exhibit a robust band structure of half-metallic antiferromagnet (HMAFM). Due to the thick blocking layer, the interlayer coupling is vanishingly small and thus the conductive channels in indi…
This process encompasses the energy use for decommissioning of a nuclear power plant and the corresponding emissions. To access the model referenced in the report, please visit https://www.netl.doe.gov/energy-analysis/details?id=2544AB35-D565-42CE-AAEA-BD68D28D07D1
We provide a theoretical perspective on the glass transition in molecular liquids at thermal equilibrium, on the spatially heterogeneous and aging dynamics of disordered materials, and on the rheology of soft glassy materials. We start with a broad introduction to the field and emphasize its connections with other sub…
Oxide nanowire arrays are playing an important role in energy sciences nowadays, including energy harvesting, energy storage, and power management. By utilizing a wet chemical growth method, we demonstrated the capabilities of synthesizing density controlled vertical ZnO nanowire arrays on a general substrate, optimiz…
The objective of this report is to assess the potential impact of reducing conservatism in the implementation of the current liquidus temperature (TL) model in the Product Composition Control System (PCCS) on the ability to target higher waste loadings (WLs) for future sludge batches. No changes to the TL model or the…
In recent years, higher discharge burn-ups and initial fuel enrichments have led to more and more heterogeneous core configurations in light water reactors (LWRs), especially at the beginning of cycle when fresh fuel assemblies are loaded next to highly burnt ones. As this trend is expected to continue in the future,…
The implementation of a spin qubit in a quantum ring occupied by one or a few electrons is proposed. Quantum bit involves the Zeeman sublevels of the highest occupied orbital. Such a qubit can be initialized, addressed, manipulated, read out and coherently coupled to other quantum rings. An extensive discussion of rel…