Materials Literature
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AbstractEvaporation of fluid at micro and nanometer scale may be used to self-assemble nanometre-sized particles in suspension. Evaporating process can be used to gently control flow in micro and nanofluidics, thus providing a potential mean to design a fine pattern onto a surface or to functionalize a nanoprobe tip.…
AbstractBio-nanopatterning of surfaces is a very active interdisciplinary field of research at the interface between biotechnology and nanotechnology. Precise patterning of biomolecules on surfaces with nanometre resolution has great potential in many medical and biological applications ranging from molecular diagnost…
A new preparation route to the intermetallic clathrate-I compound Na2Ba6Si46 is introduced, which allows one to make large amounts of product with standard laboratory equipment. The precursor Na2BaSi4 is oxidized with gaseous HCl at 673 K to Na2Ba6Si46, NaCl and BaCl2. Full-profile refinement of the crystal structure…
The potential positive and negative effects of nanotechnology on the environment are discussed. Advances in nanotechnology may be able to provide more sensitive detection systems for air and water quality monitoring, allowing the simultaneous measurement of multiple parameters and real time response capability. Metal…
A formulation of nonlocal plasticity with kinematic and isotropic hardening is presented. The treatment is developed within the framework of an internal variable model. The nonlocal variables are defined as a weighted average of the corresponding local ones over all the material points in a representative volume cente…
This article presents the results of the research in the area of the possibilities of the utillisation of the natural zeolite from the locality Ni ný Hrabovec at reduction of combustion engines toxical gases. The combustion engines produce a lot of toxical emissions. There is an increased interest to utilize zeolites…
29 种(24 个类， 6 个家庭) 在东北典型、普通的蝴蝶，中国被选择借助于扫描电子显微镜学和接触角测量系统在模式， hydrophobicity 和 hydrophobicity 机制上做质、量的研究。规模表面由 submicro 班组成垂直凸圆和水平连接。规模的距离是 48—91 渭 m，长度 65—150 渭 m，和宽度 35—70 渭 m。submicro 班的 Thedistance 规模上的垂直凸圆是 1.06—2.74 渭 m，高度 200—900 nm，和宽度 200—840 nm。蝴蝶翅膀的表面上的更好的 hydrophobicity (静态的接触 angle136.3 掳—156.6 °) 被贡献微班的规模和…
Nacre (the pearly internal layer of molluscan shells) is an attractive nanocomposite displaying high mechanical properties, low density and a good biocompatibility with human bones. It is currently studied for both the prosthesis design and the creation of new organic/inorganic hybrid materials by mimicking biomineral…
Most of the scientific studies on compact spinning, which is a modified version of ring spinning, have hitherto been focused on the properties of yarns and knitted fabrics. Yarns are subjected to intense mechanical stresses such as those during sizing, warping and weaving until the woven fabrics are produced. In this…
samples, with , exhibit an emission in the blue region with a dominant wavelength of at . The energy is absorbed by the Tm 3+ ion to the emitting level, then transferred to a lower state via radiative transition. A single exponential decay behavior was observed for diluted samples, and a nonexponential decay behavior…
Hydrogels formed from the self-assembly of oligopeptides are being extensively studied for biomedical applications. The kinetics of their gelation, as well as a quantitative description of the forces controlling the rate of assembly has not yet been addressed. We report here the use of multiple particle tracking to me…
Alternating layers of calcite and aragonite, precipitated from mineral spring in fracture zones of serpentine mass, occur at Kashio, Oosika mura, Nagano Prefecture, Japan. Element mapping by means of Micro-area X-ray Fluorescence (MXRF) conclusively demonstrated that strontium concentrates more in aragonite layer, and…
Diatoms are unicellular photoautotrophic eukaryotes that play an important role in ecology by fixing large amounts of CO2 in the oceans. Because they evolved by secondary endocytobiosis—a process of uptake of a eukaryotic alga into another eukaryotic cell—they have a rather unusual cell biology and genetic constitutio…
Capped boron nanoparticles have been synthesized at room temperature by a simple route that does not involve the use of flammable boranes.
Ring and cage aggregates containing the large alkali metals potassium or rubidium have proven to be excellent building blocks for the creation of high-connectivity nets, as demonstrated by their use as septahedral and nonahedral nodes in synthesis of two new types of 7-connected nets and the first ever example of a 9-…
A thermostat of the Nosé–Hoover type, based on relative velocities and a local definition of the temperature, is presented. The thermostat is momentum-conserving and Galilean-invariant, which should make it suitable for use in Dissipative Particle Dynamics (DPD) simulations, as well as nonequilibrium molecular dynamic…
A new class of highly branched polymers referred to as dendrimer-like polymers has been developed in the last decade, the first synthetic example dating back to 1995. Dendrimer-like polymers exhibit molecular features similar to those of regular dendrimers, such as the presence of a central core, a precise number of b…
A high-voltage hybrid electrochemical capacitor (HEC) which uses nongraphitizable carbon for a negative electrode and activated carbon for a positive electrode has been constructed with lithium salt for the electrolyte. Under high-voltage conditions, large capacity loss during charge-discharge cycling was observed whe…
Uniform and cube-structured RE3+ (RE=Pr,Tb) -doped CaSn O3 phosphors have been successfully synthesized by a two-step approach including the room-temperature synthesis of CaSn (OH)6 precursors with the help of cetyltrimethylammoniumbromide surfactant and then converted to CaSn O3 by calcination at 750°C. The decomposi…
Selective condensation of 5-ferrocenyldipyrromethane, 1, and dipyrromethane, 2, with benzaldehyde, 3, led to 5-ferrocenyl-10,20-diphenylporphyrin, 5. During the condensation, an unusually large amount of scrambling was observed which led to the isolation of two further ferrocenylated porphyrin analogues 6 and 7. The s…