Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We demonstrate a novel artificial optical material, a photonic hyper-crystal, which combines the most interesting features of hyperbolic metamaterials and photonic crystals. Similar to hyperbolic metamaterials, photonic hyper-crystals exhibit broadband divergence in their photonic density of states due to the lack of…
The structural properties of the uranium-encapsulated nano-cage U@Au14 are predicted using density functional theory. The presence of the uranium atom makes the Au14 structure more stable than the empty Au14-cage, with a triplet ground electronic state for U@Au14. Analysis of the electronic structure shows that the tw…
Adsorption of hydrogen atoms to a carbon atom vacancy in graphene is investigated by means of periodic \emph{first principles} calculations, up to the fully hydrogenated state where six H atoms chemically bind to the vacancy. Addition of a single H atom is highly exothermic and barrierless, and binding energies remain…
The temperature dependence of conductivity of partially dehydrochlorinated PVC films, containing in their macromolecules chains of polyene-conjugated bonds (PCB) and representing copolymer PVC-Polyacetylene. In samples with excess of some "threshold" concentration of PCB with increasing temperature it was found conduc…
We propose a model for thermo-elastic beams, consistent with the parent theory of linear three-dimensional thermo-elasticity and deduced by a suitably version of the Principle of Virtual Powers. Dimensional reduction is achieved by postulating convenient a priori representations for mechanical and thermal displacement…
经济活动在过去一个世纪的增长导致了我们需要迫切思考的相互关联的问题。近年来，由于塑料的过度消费，开发生物可降解聚合物成为经济进步的重要因素。另外，纳米珠的应用激发了工业和生物医学应用方面的兴趣。这些可生物降解的聚合物，聚羟基链烷酸酯(PHAs)是广泛细菌在细胞质中碳过量的极限生长条件下产生的3、4、5和6羟基链烷酸多羟基酯家族中的一员。这些碳和能量存储聚合物是可降解的并且不溶于水的，体现出一定的热塑性，并且它们可以由可再生碳源生产。在本研究中，由天然恶臭假单胞菌产生的PHA通过甲醇分解和FTIR方法进行验证，结果表明该菌能产生PHA。然后，使用适当的引物和聚合酶进行链反应，对PHA合酶基因进行扩增、测序并与NCBI登记的序列进行比…
Gallium nitride (GaN)/alumina (Al2O3) core-shell structures were successfully synthesized by a simple and one-step thermal evaporation method. We characterized their morphology, microstructures, and optical properties by SEM, TEM, EDX, and photoluminescence (PL). The core-shell structures were comprised of a core of s…
Abstract : Actinide single crystals are important to the fabrication of next generation electronic devices that could possibly have radiation with the atmosphere and surroundings. Th02 single crystals were obtained previous to this work by hydrothermal synthesis. As these crystals were the first of their kind, the geo…
This deliverable is a review report which evaluates the progress and feasibility of the biocomposite systems, designs and installations, taking into account the information resulting from the work developed in the aim of Biobuild project. The main steps followed in the project up to this moment to develop bio-systems…
The Chinese spallation neutron source (CSNS) is a high-performance pulsed neutron source, having 20 neutron beamlines for neutron scattering instruments. The shielding design of these beamlines is usually needed for Monte Carlo (MC) calculation, and the use of variance reduction methods is critical to carrying out an…
Viscoelastic properties have been observed in maize zein above its glass transition temperature; however, current understanding of how these viscoelastic polymers can be further manipulated for optimal performance is limited. Using resins formed via precipitation from aqueous ethanolic environments, this study present…
الخلاصة تم تحضير صبغة ثنائية الازو MP 2 ودراسة ثرموديناميكي ة لامتزازها على سطح الفحم المنشط وحدد زمن وتركيز الاتزان طيفيا بواسطة جهاز الأشعة المرئية – فوق البنفسجية ,وطبقت معادلتي فرندلش ولانكماير الايزوثيرميتين على النتائج المستحصلة ،وأوضحت النتائج أن الامتزاز على سطح الفحم المنشط يتبع معادلة فرندلش ( Frendlich ) لل…
Normal 0 false false false RU X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Обычная таблица"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin…
Aceclofenac is aceclofenacum (O-(2, 6-dichloroaniline) phenyl] acetate glycolic acid ester, 2-(2, 6dichloraniline) phenyl acetoxy acetic acid. Aceclofenac is a Non-Steroidal Anti Inflammatory drug. It is used in the management of osteoarthritis, rheumatoid arthritis and ankylozing spondylitis. Aceclofenac when taken o…
A criterion of the efficiency evaluation of corrosion inhibitors of metallic samples in aqueous solutions was proposed for the first time.The criterion was derived based on calculating the limit of ratio value of the resistivity of carbon steel sample in inhibited seawater (ρins) to the resistivity of the carbon steel…
The melting of fluorographene is very unusual and depends strongly on the degree of fluorination. For temperatures below 1000 K, fully fluorinated graphene (FFG) is thermo-mechanically more stable than graphene but at T$_m\approx$2800 K FFG transits to random coils which is almost twice lower than the melting temperat…
The recycling of polymeric materials has been highly discussed due to economic and environmental factors. It is well known that, polypropylene can be used for many applications and, depending on the final characteristics that are necessary, they use different additives. So, this study aims to evaluate the mechanical p…
The desired result of magnetic anisotropy investigations is the determination of value(s) of various anisotropy constant(s). This is sometimes difficult, especially when the precise knowledge of saturation magnetization is required, as it happens in ferromagnetic resonance (FMR) studies. In such cases we usually resor…
采用“配位-氧化聚合-水热法”制备了本征态聚苯胺/CoFe 2 O 4 二元纳米复合物，再以磺基水杨酸掺杂获得聚苯胺/CoFe 2 O 4 电磁复合物. 考察了反应物配比及掺杂酸浓度对产物电磁性能的影响. 通过透射电子显微镜（TEM）、X射线衍射（XRD）、红外光谱（FTIR）及电磁测量等手段对聚苯胺/CoFe 2 O 4 的形貌、结构及性能进行了表征. 结果表明，复合物呈现多级结构，其中CoFe 2 O 4 为立方体状，平均粒径小于20 nm. 当CoFe 2 O 4 的质量分数为8.86%时，复合物的电导率约为0.43 S/cm；当聚苯胺/CoFe 2 O 4 复合物厚度为2 mm时，在16.01 GHz处最大反射损耗为-16…
The motion of colloids in the flow field of a viscous liquid is investigated. The small colloid size compare to the macroscopical scale of the flow allow to calculate their velocity relative to that of the liquid. If the inner colloid density is larger then the density of the liquid the flow field has the domains wher…