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。
The Matryoshka theory: This unique type of shell-in-shell microcapsule facilitates the stable spatial separation of biopolymers (enzymes) within distinct compartments of a single capsule entity. Architecture and wall properties of this system allow for the concerted action of enzymes from separate capsule compartments…
Dealloying single phase alloys is known to generate a type of nanostructured porous metals with intriguing properties. In this study, nanoporous gold (NPG) made by dealloying Au−Ag is investigated as a novel electrode material for methanol electro-oxidation. Compared to bulk Au electrode, oxidation and subsequent redu…
Abstract In this article, we consolidate several literature reports in an attempt to provide a structural definition of a polymer brush as a tethered polymer layer with a high grafting density of polymer chains. We will try to distinguish a brush from grafted polymer layers and coated layers and provide a reasonable a…
The experimental work presented focuses on transient growth, morphological transitions, and control of xenon dendrites. Dendritic free growth is perturbed by two different mechanisms: Shaking and heating up to the melting temperature. Spontaneous and metastable multitip configurations are stabilized, coarsening is red…
Fluorescence lifetime (FL) temperature sensing scheme has been discussed based on the experimental observations for triply ionized samarium doped in oxyfluoroborate glass. At higher temperatures, the large deviations between the experimental and theoretical value is noted, showing the suitability of the FL technique o…
Abstract A method for the production of transparent carbon nanotube networks (CNTNs) over transparent substrates was developed. In this method, CNTNs were grown directly in the target surface by applying the catalyst in specific zones of the substrate through lithographic techniques. The networks can be also transferr…
Abstract We report an alternative method to modify talc for use in the fabrication of composites of polypropylene (PP) and talc. Grinding pulverization is employed to prepare talc fillers (referred to hereafter as p ‐talc). The properties of composites made with p ‐talc compare favorably with composites made with pulv…
Abstract Unnatural hybrid polysaccharides with an alternating structure of different kinds of monosaccharide units have been synthesized by enzymatic polymerization catalyzed by a glycoside hydrolase. For the synthesis, various activated monomers with a disaccharide structure were designed on the basis of the concept…
A microscopic model of nonequilibrium light-induced phase transitions in spin crossover systems based on the solution of the equations for the density operator is developed. The conditions of light-induced and thermally induced bistability are revealed. The results are compared with those obtained in the framework of…
The pyrochlore-type matrices containing up to 10% wt. of U, Np, Pu and Am oxides were produced by self-propagating high-temperature synthesis (SHS) proposed as a method of preparation of the ceramic mineral-like matrices for immobilization of actinides. It was shown that basically the matrices consist of a phase of yt…
Chain dynamics in macromolecules that occur with slow characteristic exchange frequencies (1−100 Hz) influence the bulk mechanical properties of polymers. In this contribution, we systematically evaluate the change in conformational reorientations of individual polymer backbones once they form a miscible binary blend,…
Even six years after the first discovery of superconductivity in MgCNi3, the synthesis of this compound in the form of single crystals has not been very successful. Highly volatile Mg and less-reactive C are the main obstacles. Now, the synthesis and characterization of these single crystals are reported (see figure),…
The ability of quaternized polyamines (poly-N-alkyl-4-vinylpyridinium bromides possessing a number, m, of methylene groups in the N-alkyl substituent or a degree of alkylation, beta, and n,n-ionene bromides) to suppress the thermoaggregation of glyceraldehyde-3-phosphate dehydrogenase increased in the order m = 1 < 3…
A study of the borotungstate system has led to the characterization of new, original compounds based on the unconventional Keggin derivative [H(3)BW(13)O(46)](8-) ion (denoted as 1). [H(3)BW(14)O(48)](6-) (2) and the dimer [H(6)B(2)W(26)O(90)](12-) (3) crystallize as mixed cesium/ammonium salts and have been character…
Abstract Sodium alginate/chitosan (SA/CS) two ply composite membranes were prepared by casting and solvent evaporation technique. NaHCO 3 was used as a porogen additive to form pores in the interior of the composite membranes and glycerol was introduced as a plasticizer. The water uptake capacity, mechanical strength,…
The electron-phonon matrix element for edge states of carbon nanotubes and graphene at zigzag edges is calculated for obtaining renormalized energy dispersion of the edge states. Self-energy correction by electron-phonon interaction contributes to the energy dispersion of edge states whose energy bandwidth is similar…
Abstract The influence of annealing atmosphere on the optical properties of flower‐like ZnO is investigated. The flower‐like ZnO is composed of nanosheets. Annealing at 500°C results in the increase of the thickness of nanosheets and the enhancement of UV emission. PL spectra results show that the annealing atmosphere…
We present an important step in resolving a long-standing controversy regarding the lifetime of the internal ${\mathrm{Mn}}^{2+}$ $3{d}^{5}$ emission in $\mathrm{ZnS}$ nanoparticles. Transients of the luminescence have been measured over more than five orders of magnitude in intensity, and in the time slot from $50\ph…
We have studied, both theoretically and experimentally, the mechanism of photoluminescence (PL) of Ge nanocrystals in SiO 2 and GeO 2 matrices. Ge quantum dots (QDs) have been created by pulsed laser deposition (PLD). Time-resolved PL spectra in the photon energy range of 1.4– 3.2 eV have been measured within the time…
Single crystals of the MgZn2Ce alloy (magnesium dizinc cerium) were synthesized by a two-step method which couples the thermal treatment of pressed pellets of the pure elements with subsequent arc melting. The compound crystallizes in a Heusler-type (MnCu2Al) structure in the space group Fm\overline{3}m, with one Zn s…