Materials Literature
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Abstract New method for design and realizing multiband metamaterial is presented.For this purpose, resonator‐based metamaterial is designed and investigated by both simulation and experiment with well agreement. By serially arranging the nonconcentric open loop metallic elements with different dimensions, the structur…
Spatial and temporal heterogeneities in expanded and collapsed surface bound poly(N-isopropylacrylamide), pNIPAAm, films are studied by single molecule tracking (SMT) experiments. Tracking data are analyzed using both radius of gyration (R(g)) evolution and confinement level calculations to elucidate the range of beha…
We have studied TbMnO${}_{3}$ by high-pressure neutron diffraction up to 3.6 GPa and down to 1.5 K. The incommensurate spin structures of the Mn and Tb moments are strongly suppressed under pressure, and an $E$-type commensurate spin structure with $(0,1/2,0)$ propagation vector is stabilized for the Mn moments. The M…
The sol-gel process has been successfully combined with the "mixed cation" effect to produce novel luminescent and ion conducting biohybrids composed of a diurethane cross-linked poly(ε-caprolactone) (PCL530)/siloxane hybrid network (PCL stands for the poly(ε-caprolactone) biopolymer and 530 is the average molecular w…
Fabrication of an all-optical switchable holographic liquid crystal (LC) Fresnel lens based on azo-dye-doped polymer-dispersed LCs is reported using a Michelson interferometer. It is found that, upon circularly polarized photoirradiation, the diffraction efficiency of the fabricated Fresnel lens was increased signific…
In the past few years a number of reviews, books and journal articles featuring silks have been published. Silks are produced by over 41,000 species of spiders (class Arachnida) and by many insects (terrestrial and aquatic), particularly in the order Lepidoptera The cocoon silk from the domesticated silkmoth, Bombxy m…
Abstract Nickel oxide and yttria doped zirconia composite strength is crucial for anode‐supported solid oxide fuel cells, especially during transient operation, but also for the initial stacking process, where cell curvature after sintering can cause problems. This work first compares tensile and ball‐on‐ring strength…
The application of ultrasonic technology has been receiving wide attention in water and wastewater treatment and environmental remediation areas, such as degradation of recalcitrant organic pollutants in aqueous phase (Hiskia et al., 2001; Song et al., 2006; Yang et al., 2006; David, 2009; Neppolian et al., 2009; Veci…
Magnetic cellulose fiber composites were prepared by a “vacuum-lumen-loading” method with polyethylenimine (PEI) as retention aid. The composites thus formed preserved the inherent properties of the cellulose fiber and gained the magnetically responsive properties of nanoparticles. Magnetic paper was further made from…
The theoretical foundations of superresolution imaging of nanoscale objects with the Veselago/Pendry Superlens are reviewed from a microwave engineering viewpoint. Insights into the dynamic response of the Superlens, gained from both theoretical and numerical studies, are presented. The results provide new perspective…
Hierarchical nanostructures are of particular interest to researchers for their promising applications in functional materials. This work focused on the large-scale construction of 2-fold-symmetrical hierarchical ZnO nanostructure through wet-chemical route on preformed caky Zn substrate via the electroplating method.…
Promotion of dehydrogenation based on the interaction of [BH 4 ] − and [NH 2 ] − sources has been demonstrated to be one of the most effective approaches in developing an advanced borohydride/amide hydrogen storage combined system. The Ca(BH 4 ) 2 –2Mg(NH 2 ) 2 and Ca(BH 4 ) 2 –2Ca(NH 2 ) 2 composites are thereby synt…
In the present work we have studied the influence of surface-induced interphases on the properties of a cross-linked polymer adhesive by reactive molecular dynamics (RMD) simulations. Particular attention has been directed to segregation phenomena leading to changes in the interphase dimension. To investigate the pres…
We study the spin excitations of the block-antiferromagnetic state in K${}_{0.8}$Fe${}_{1.6}$Se${}_{2}$. Due to the nature of block antiferromagnetism, we expect spin-wave excitations to possess both Goldstone modes and optical branches. We use a simple model Hamiltonian to demonstrate this idea and compute the disper…
Abstract Using generalized gradient elasticity, this paper studies transverse wave characteristics of carbon nanotubes (CNTs) in a free space and embedded in a surrounding elastic medium. For flexural waves propagating in single‐walled CNTs, the phase and group velocities are obtained analytically and they are scale‐d…
This paper demonstrates a laser direct-write method to form single crystal semiconductor ferroelectric SbSI features on chalcogenide glasses for integration into infrared devices. The method overcomes a major limitation of thin-film deposition techniques, viz. the uncontrolled stoichiometry of SbSI due to very differe…
The role of localized surface plasmon resonances near the surface of a silver or gold wedge is discussed based on quasistatic theory. Strongly enhanced electromagnetic field intensities at moderate distances of 1 nm from the wedge are found by manipulating morphology and dielectric environment. The theory also shows t…
以聚合有机锆与聚碳硅烷组成的共溶前驱体为原料, 采用溶液浸渍-裂解(PIP)工艺制得了2D C/C-ZrC-SiC复合材料, 对复合材料的超高温烧蚀性能进行了研究. 利用SEM和XRD对烧蚀后材料的微观结构和物相组成进行分析, 探讨了复合材料的抗烧蚀机理. 结果表明, 复合材料的质量烧蚀率和线烧蚀率随着ZrC含量的增加先减小后增大. 其中ZrC含量为17.45vol%的复合材料具有最优的抗烧蚀性能, 即在表面温度为2200℃, 等离子焰烧蚀300s后, 其质量烧蚀率仅为1.77mg/s, 线烧蚀率为0.55μm/s. 研究发现, 材料表层的ZrC氧化生成的ZrO 2 溶于SiC氧化生成的SiO 2 中, 形成粘稠的二元玻璃态混合物…
The adsorption process of hydrogen atom on nitrogen-doped carbon nanotube (CNT) and its effects on the electronic properties are investigated using the first-principles density-functional methods. As possible hydrogen adsorption sites, three different positions are considered to discuss adsorption energies of the hydr…
We present a detailed comparison of the electronic structure of BaFe${}_{2}$As${}_{2}$ in its paramagnetic and antiferromagnetic (AFM) phases through angle-resolved photoemission studies. Using different experimental geometries, we resolve the full elliptic shape of the electron pockets, including parts with ${d}_{\ma…