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 13 C NMR chemical shifts of (7,0), (8,0), (9,0), and (10,0) single-walled carbon nanotubes (SWNTs) with Stone−Wales (SW) defects have been studied computationally using a gauge-including projector-augmented plane-wave (GIPAW) density functional theory (DFT) method. A SW-defect substantially broadens the NMR signal…
Reactions of Ln(ClO4)3 · 6H2O (Ln=La(III), Eu(III), Nd(III)), 1,10-phenanthroline (phen) and phenoxyacetic acid (PA) or 2,4-dichlorophenoxyacetic acid (2,4-D) yield [La(PA)2 (phen)2]2(ClO4)2 (1), [Eu(2,4-D)2(phen)2]2(ClO4)2 (2) and [Nd(2,4-D)3(C2H5OH)] n (3). Compounds 1–3 are characterized by elemental analyses, IR,…
Abstract The aim of this work was to study the durability of a polypropylene film plasma‐treated with an 80 : 20 methane–oxygen gas mixture. Three different storage conditions were used to evaluate the influence of the relative humidity and temperature on the aging process. The surface functionalization of the polypro…
The redox speciation of Eu(III) in the 1:1 stoichiometric complex with the alpha-1 isomer of the Wells-Dawson anion, [alpha-1-P 2W 17O 61] (10-), was studied by electrochemical techniques (cyclic voltammetry and bulk electrolysis), in situ XAFS (X-ray absorption fine structure) spectroelectrochemistry, NMR spectroscop…
We have studied the effect of Ca-doping in single-crystal ${\text{Tb}}_{1\ensuremath{-}x}{\text{Ca}}_{x}{\text{MnO}}_{3}(x\ensuremath{\le}0.1)$ on the crystal and magnetic structure, magnetocapacitance, and electric polarization. For low doping $(x=0.05)$, the presence of ${\text{Mn}}^{4+}$ ions gives rise to a state…
We report observations of the changes in the surface structure of lysozyme adsorbed at the air-water interface produced by the chemical denaturant guanidinium chloride. A primary result is the durability of the adsorbed surface layer to denaturation, as compared to the molecule in the bulk solution. Data on the surfac…
The enhancement of surface enhanced Raman scattering (SERS) at the junction of linearly joined silver nanorods (31 nm in diameter) deposited in the pores of anodic aluminum oxide templates was studied systematically by excitation with a 632.8 nm laser line. The single and joined silver nanorod arrays showed a similar…
The geometry and electronic properties of three-ring tubular B(3n) clusters (n = 8-32) are studied systematically with the density functional theory. It is composed of three staggered rings with the diameter of the middle ring larger than those of the two outer rings. With the increase in boron atom numbers, the three…
Arrays of linear, one-dimensional (1D) silver nanoparticle rows have been synthesized that demonstrate strong surface enhanced Raman scattering (SERS) that is dependent on the polarization of the incident electromagnetic radiation. Ordered arrays of 1D rows of spherical silver nanoparticles were fabricated on highly o…
Water-soluble extracts from Mexican oregano (Lippia graveolens) were incorporated into soy protein isolate (SPI) films. Water vapor permeability, mechanical properties, and antioxidant ability were evaluated. All the extracts were capable of scavenging DPPH radicals in a concentration-dependent fashion; the IC50 value…
By making use of a density-functional tight-binding (DFTB) method we studied the electronic and optical properties of ZnSe/ZnS and ZnS/ZnSe core/shell nanoparticles. Our emphasis will be on the atomic charge distribution, electronic energy levels, band gap, excitation spectra, and their variation with the thickness of…
Nanostructured ultrathin films of linear and dendrimeric cationic sexithiophenes, 6TNL and 6TND, respectively, alternated with anionic polycarbazole precursor, poly(2-( N-carbazolyl) ethyl methacrylate- co-methacrylic acid) or PCEMMA32, were successfully fabricated using the layer-by-layer self-assembly deposition tec…
In this study, ZnO nanorod arrays were synthesized on a seeded substrate using the aqueous solution method. The growth rate, morphology, and crystallinity of ZnO nanorods were controlled by tailoring various process parameters and the [Zn(NO 3 ) 2 ]/[C 6 H 12 N 4 ] ratio. A high density of ZnO nanorods with well‐defin…
Based on numerical and experimental analyses, this article proposes an application of the smart structure concept aimed at realizing a bump on an airfoil profile, finalized to reduce transonic drag, through the use of shape memory alloys (SMAs). The ability of morphing the wing profile is functional to maximize the ae…
Colloidal nanorods with linear CdTe/CdSe/CdTe heterojunctions were synthesized by sequential reactant injection. After CdTe deposition at the ends of initially formed CdSe nanorods, continued heating in solution leads to Se-Te interdiffusion across the heterojunctions and coalescence to decreased aspect ratio. The Se-…
Mesoporous carbon monoliths with embedded alumina and silica nanoparticles were synthesized using phloroglucinol and formaldehyde as carbon precursors and poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymer as a soft template. While the carbon mesostructure was not significantly affected by…
We demonstrate a holographic lithography for the fabrication of diverse metamaterial structures by using an optical prism. Cylindrical nanoshells, U-shaped resonator arrays, and double-split ring arrays are obtained experimentally by real time modulating the phase relation of the interference beams. This easy-to-use m…
The interactions of CO with gold clusters are essential to understanding the catalytic mechanisms of CO oxidation on supported gold nanoparticles. Here we report a photoelectron spectroscopy and theoretical study of CO adsorption on a well-defined Au 6 − cluster in Au 6 (CO) n − ( n = 4−9). Previous studies have shown…
Abstract Colloidal particles with magnetic properties have become increasingly important both technologically and for fundamental studies. Here, chemical initiator‐free miniemulsion polymerization of styrene and butyl acrylate has been performed for preparation of magnetic nanocomposite particles with the diameter of…
Arsen im Grundwasser gefährdet die Gesundheit der Bevölkerung in Entwicklungsländer wie Bangladesh. Daher wird dort dringend ein zuverlässiges und transportables Gerät zum Arsennachweis benötigt. Ein hoch empfindliches System, das mithilfe von oberflächenverstärkter Raman-Spektroskopie (SERS, siehe Bild) Arsenat in Wa…