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。
Cellulose was extracted from papaya peels by NaOH and then modified by reacting with chloroacetic acid to obtain carboxymenthyl cellulose from the papaya peel (CMCp). Infrared (IR) spectroscopy was used to investigate changes in the functional group of the product obtained at carboxymethylation. A carbonyl peak (C=O)…
Diatoms were obtained on three different circumstances, sea-ice, sea-water, and diatommat samples, at four different locations in the central Arctic Ocean during August and September 2004. One hundred twenty diatom taxa belonging to 38 genera, 14 of which were centric and 22 of which were pennate, were recognized in t…
We have developed a simple method for the preparation of nearly mono-dispersed stable gold colloids with a fairly high concentration using a two step procedure. First we synthesize citrate capped gold nanoparticles and then exchange the citrate ions with triethyleneglycolmono-11-mercaptoundecylether (EGMUDE). This lea…
A new monomer, which incorporates both aniline and methacrylamide functional groups, was shown to possess orthogonal polymerisation behaviour to produce conjugated polyaniline suitable for a wide range of applications.
A novel near-infrared (NIR) electrochromic polyelectrolyte consisting of anthraquinone imide (AQI) pendants and a poly(1-vinylimidazole bromide) main chain was synthesized viaradical polymerization. Its AQI content was varied by copolymerization with 1-vinyl-3-butylimidazole bromide to improve the processability of th…
Vertically grown silver nanowires (Ag NWs) 100–150 nm in diameter and 5–10 µm in length have been successfully prepared by thermally assisted photoreduction (TAP) of aqueous silver nitrate (AgNO3) solution on anatase films without using surfactants, templates or seeds. X-Ray diffraction (XRD) and transmission electron…
Direct visual observations on how grain boundaries are pinned between multiple large spherical impurities during colloidal hard sphere crystallisation are presented. The fluid is stabilized between impurities and acts as a precursor for grain boundary formation. The range of fluid stabilisation by a single impurity is…
The influence of the process duration, anodizing potential and methanol addition on the structural features of porous anodic alumina formed in a 0.3 M H 3 PO 4 solutions by twostep self-organized anodizing was investigated for potentials ranging from 100 to 170 V. The structural features of porous structures including…
Organic acids are considered as potential substrates for biosynthesis of polyhydroxyalkaonates. The acids may also be the metabolic inhibitors at moderate concentration levels. In this study, Ralstonia eutropha was used to elucidate the protein regulations when the bacterial cells pre-cultivated on glucose were expose…
Twist-spun yarns made of carbon nanotubes have been shown to work as electrochemical actuators and force sensors. The electrochemical response of these yarns at different bias potentials was studied using electrochemical impedance spectroscopy (EIS) and compared with results from cyclic voltammetry. Based on the EIS r…
The reactions of [Ni(alpha-SS-L)](ClO(4))(2)/[Ni(alpha-RR-L)](ClO(4))(2) with dca(-) gave two enantiomers of [Ni(SS-L)](dca)(2) (S-) and [Ni(RR-L)](dca)(2) (R-) in acetonitrile/water, and two supramolecular stereoisomers of {[Ni(SS-L)](2)(dca)(3)(ClO(4)).DMF}(n) (Delta-) and {[Ni(RR-L)](2)(dca)(3)(ClO(4)).DMF}(n) (Lam…
A new type of supramolecular chiral dendritic monophosphite ligands has been prepared via a hydrogen-bonding assembly. The Rh complexes of these supramolecular ligands have been successfully applied in the asymmetric hydrogenation of enamides and dehydroamino acid derivatives with good enantioselectivities, which are…
The new tetra-acetylide carbonyl clusters [H(4-n)Ni(22)(C(2))(4)(CO)(28)(CdBr)(2)](n-) (n = 2-4) have been prepared by reacting [Ni(10)C(2)(CO)(15)](2-) with a large excess of CdBr(2).xH(2)O and the molecular structure of the di-anion [H(2)Ni(22)(C(2))(4)(CO)(28)(CdBr)(2)](2-) has been fully elucidated by means of X-r…
Abstract—In this paper we investigate boundary effects and other consequences of spatial dispersion by analyzing in detail the response of a metamaterial half-space to a monochromatic plane wave normally incident from free-space. The metamaterial is composed of an orthorhombic lattice of identical particles, each of w…
Fabrication of polymer nano-crystals proceeds usually through hierarchical ordering of the different-scale structures. Nano-scale patterns are produced first, which serve as a spatial template for subsequent polymer crystallization under nano-confinement. We begin with a survey of the effects of nano-confinement on po…
The oxidation of Ni(II) N-confused porphyrins (NCPs) with azo radical initiators resulted in an unexpected intramolecular nucleophilic substitution reaction via a proposed Ni(III) NCP intermediate, which could be detected by HRMS.
Novel 5,15-bis(9-anthracenyl)porphyrin derivatives (, ) were synthesized by stepwise Suzuki-type coupling reactions using anthracenyl-boronates bearing various electronically active moieties. Absorption spectra of these porphyrin conjugates reveal some degree of delocalisation with the directly linked chromophores, pa…
Bright and colourful nanocomposites are easily fabricated by doping and fixing one or two kinds of oligosilicate fluorescent dots encapsulated with dye molecules into the pore channels of mesoporous silica nanoparticles, which can engender abundant fluorescent signals with a single excitation wavelength.
A versatile synthetic strategy based on the use of a non-peripherally substituted dihydroxysilicon phthalocyanine and dihydroxygermanium octaethylporphyrin has permitted controlled construction of heterodyads that absorb across the whole visible spectrum; the same phthalocyanine also reacts with chlorosubphthalocyanin…
We study the effective interactions of interstitials and vacancies in two-dimensional colloidal crystals with Monte Carlo simulations. For both types of defects, the interactions are strongly attractive leading to the formation of defect strings. These highly mobile strings, two-dimensional analogs of prismatic disloc…