Materials Literature
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A novel technology has been developed for the synthesis of thioglycolic acid (TGA)-capped CdSe quantum dots (QDs) in aqueous medium. The reaction was carried out in air atmosphere with one-pot by using <TEX>$SeO_2$</TEX> to replace Se or <TEX>$Na_2Se$</TEX>. The technological parameters including refluxing time, pH va…
Liquid crystal (LC) lenses with a circularly hole-patterned electrode possess excellent characteristics in optical performance, especially for the capability of tunable focal lengths. But, non-uniformly symmetrical electric fields in LC lenses usually induce disclination lines when operating. In general, the occurrenc…
The carbon nanotube (CNT) is a unique form of carbon material. Since its discovery, CNT has been intensively studied due to its remarkable electrical, mechanical, thermal, and chemical properties (Iijima, 1991; Katz & Willner, 2004). Based on the structures and dimensions, CNTs can be divided into two groups: single-w…
Various diamonds were analyzed with photoluminescence (PL) spectra excited with synchrotron radiation in the wavelength range 160-250 nm. The emission of type IaAB diamond begins near 300 nm and extends to 700 nm; two broad lines with maximums about 419 and 469 nm correspond to energies 2.96 and 2.64 eV, respectively.…
We discuss the effect of disorder on the band gap measured in bilayer graphene in optical and transport experiments. By calculating the optical conductivity and density of states using a microscopic model in the presence of disorder, we demonstrate that the gap associated with transport experiments is smaller than tha…
Ultrastabile Schäume mit optimaler Schäumbarkeit sind mithilfe von Hydroxyfettsäure-Röhren zugänglich (siehe Bild). Die Stabilisierung ist die Folge der Adsorption von Monomeren an der Luft-Wasser-Grenzfläche und dem Vorliegen von Röhren in den Plateau-Grenzen. Beim Erwärmen gehen die Röhren in Micellen über, was zur…
Radar-absorption materials (RAM) have a growing and widespread applications in broadcasting and television, radar technology and microwave dark-room. In particular, in military applications, stealth weapons exhibit crucial effect in war. The research of RAM has been accelerating with the stealth technology and signifi…
Abstract The traditional methods for polymer processing involve either high temperatures, necessary for melting or viscosity reduction, or hazardous organic solvents and chlorofluorocarbons. Due to the undesirable environmental and biological impact of these solvents, intensive research is focused on seeking new and c…
Controlled synthesis of mesoporous materials with ultracomplicated pore configurations is of great importance for both fundamental research of nanostructures and the development of novel applications. IBN-9, which is the only tricontinuous mesoporous silica with three sets of interpenetrating three-dimensional channel…
The interface between nano-scale films is of relevance in many critical applications. Specifically, recent technological advances in semiconductor industry that utilize silicon-on-insulator devices have given importance to the understanding of thermal transport across Si-SiO2interface. Estimates of interfacial (Kapitz…
Electron-hole pairs are copiously created by an applied electric field near the Dirac point in graphene or similar two-dimensional electronic systems. It was shown recently that for sufficiently large electric fields $E$ and ballistic times the $I\ensuremath{-}V$ characteristics become strongly nonlinear due to Schwin…
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…