Materials Literature
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Homometallic complexes which contain exclusively 3d metal ions and heterometallic complexes with 3d/4f metal ions attract, nowdays, the intense interest of inorganic chemists, due to their important magnetic, optical and catalytical properties. The chemistry of polynuclear complexes (clusters) of the 1st row transitio…
We investigate the electronic, ferroelectric and magnetic properties of KTaO3/PbTiO3 interfaces by using conventional density functional theory (DFT) and advanced DFT such as hybrid functional HSE06. We show that doped holes in valence bands or electrons in conduction bands give rise to ferromagnetism at the interface…
应用高水平量子化学方法MP2／6—311＋＋G（2d，2p）//M062X／6—311＋G（d,p）对气相中的Zn^2＋（H2O）n（n=10～12）团簇进行优化，获得其多种稳定结构，计算并比较不同Zn^2＋的配位数下的结合能及电荷分布．结果表明：当n=10～12时，Zn^2＋的配位数可以为4、5或6，其中最稳定结构的Zn^2＋配位数为5或6．随着水分子数的增加，体系最稳定结构的氢键数和离子与内层水分子中氧的距离RZn-O都在不断增加．
Difference Map (DM) for phase retrieval with a random mask is analyzed. DM is a general class of iterative phasing schemes including Hybrid-Projection-Reflection (HPR) and Douglas-Rachford (DR) algorithms. For rank-2 complex objects whose pixel values are limited to a convex sector in the complex plane, it is proved t…
Das Wachstum makroskopischen und einlagigen Graphens und dessen Implementierung in großflächige Bauelementen ist von großem Interesse. Großflächiges Graphen wird mit Hilfe eines optimierten CVD-Prozesses auf polykristalliner Kupferfolie bei hohen Temperaturen gewachsen und durch einen eigens entwickelten Transferproze…
[ANGLES] Carbon Nanotubes have been one of the most intensively studied materials in the last two decades. Because of their combination of outstanding properties (mechanical, thermal, electrical, optical, etc.) the community expects to exploit their potential in a myriad of different applications. One of them is that…
以三枝化低不饱和度聚环氧丙烷（PPO）引发 D -丙交酯（ D -LA）逐步开环聚合，合成了三枝化聚环氧丙烷-聚右旋乳酸（PPO-PDLA）共聚物. 用辛酸亚锡Sn（Oct） 2 与PPO-PDLA端羟基反应进行Sn（Oct）封端，制备了三枝化PPO-PDLA-Sn（Oct）预聚物. 再于130 ℃下，以其作为大分子引发剂与 L -丙交酯（ L -LA）开环聚合，合成了分子量>10 5 的三枝化PPO-PDLA-PLLA嵌段共聚物. 活性端基的引入，降低了聚合反应温度，从而降低了聚合中的酯交换或热降解反应发生的概率. 实现了高分子量PPO-PDLA-PLLA嵌段共聚物的合成. 结构测试结果表明，合成的嵌段共聚物具有分子结构易控及立…
We numerically analyse the full non-linear hydrodynamic equations of a sheared nematic fluid under shear stress and strain rate controlled situations incorporating spatial heterogeneity in the gradient direction. For a certain range of imposed stress and strain rates, this extended dynamical system shows signatures of…
This paper summarizes the impact of various types of recycled polymers on the basic properties of silicate products. The results of compressive strength test, water absorption and bulk density as well as the structure of the material were analyzed.
Friction Stir Welding is a solid state welding process widely used to fabricate aluminium, magnesium and copper structures across a broad range of industries where high strength welds are required in safety critical applications. Work is underway to transfer the process into the fabrication of steel structures, bringi…
A coordination polymer, namely [Co_(1.5)(btc)(2,2′-bpy)_(0.5)(2H_2O)]_n(1) has been constructed hydrothermally using H_3btc (H_3btc=biphenyl-2,4,4-tricarboxylic acid), 2, 2′-bpy (2, 2′-bpy=2, 2′-bipyridine), and CoCl_2·6H_2O. The compound crystallizes in the monoclinic system, space group I2/a with a=1.774 4(4) nm, b=…
In an interview with Prof. Francis Moon, Professor Alan Zehnder of the Sibley School of Mechanical and Aerospace Engineering discusses his trajectory into academia and life at Cornell. Prof. Zehnder grew up in Alameda, California, then home of the Alameda Naval Air Station. His early interests in engineering were fost…
Les aciers inoxydables lean duplex, à faible teneur en nickel et sans molybdène, représentent une alternative économique pour les usines de dessalement et l’industrie pétrolière. Celles-ci ont la particularité d’être exposées à des milieux très agressifs dont la présence de chlorure, de sulfure d’hydrogène, de hautes…
There is a growing demand on power sources for micro-system applications. Li-ion micro batteries (µ-batteries) with silicon-based anodes may fulfill the necessary requirements. Silicon shows superior properties as anode material in batteries such as a very high specific capacity [1]. Well-engineered manufacturing tech…
En el presente trabajo de investigación se busca mostrar la posibilidad de producir mullita de alta calidad en Argentina, utilizando materias primas nacionales y comodities internacionales con el objetivo de obtener un material confiable, de excelentes propiedades en el uso y con un costo razonable para ser incorporad…
In this study, two software packages using different numerical techniques FEKO 6.3 with Finite-Element Method (FEM) and XFDTD 7 with Finite Difference Time Domain Method (FDTD) were used to assess exposure of 3D models of square, rectangular, and pyramidal shaped water containers to electromagnetic waves at 300, 900,…
Esta dissertacao dedica-se a implementacao de modelos caixa preta lineares de transformadores monofasicos e trifasicos que sejam capazes de reproduzir o comportamento desses equipamentos em uma faixa de frequencias de 10 Hz a 2 MHz. Sao considerados um transformador de potencia monofasico de 75 MVA e 240/ 3 ±2x2,5% /…
Se han obtenido nuevos datos sobre las propiedades fi sico-químicas, microestructurales y cristalo-químicas\n\t\t\t\t del mineral paligorskita de Torrejón el Rubio (Cáceres, Spain) mediante una combinación de técnicas\n\t\t\t\t experimentales (XRD, FRX, FTIR, TG-DSC, SEM y análisis químico), así como mediante la optim…
Fourier-domain Difference Map (FDM) for phase retrieval with two oversampled coded diffraction patterns are proposed. FDM is a 3-parameter family of fixed point algorithms including Fourier-domain Hybrid-Projection-Reflection (FHPR) and Douglas-Rachford (FDR) algorithm. For generic complex objects without any object c…
With the ever-increasing demand for energy storage, lithium ion battery has been an attractive technology that has revolutionized the portable electronic industry [1]. With its large scale applications, such as in hybrid electric vehicles (HEV’s), and plug-in HEVs, there is great interest in developing multifunctional…