Materials Literature
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In some skeletal-forming and sedimentary environments, calcite and other CaCO3 polymorphs are produced from an amorphous calcium carbonate (ACC) phase. This experimental study determined the Mg content of calcites that grew in the presence of ACC with/without carboxylated biomolecules. The Mg content of the initial AC…
Gold nanoparticles electrostatically stabilized with negatively charged ruthenium complexes were individually monitored based on their characteristic plasmon bands, by means of hyperspectral dark field microscopy. Very strong SERS enhancements were observed for the isolated gold nanoparticles at exciting wavelengths i…
Here, we describe a novel and versatile approach for fabrication of multilayer polymeric thin films with a tunable, ordered periodic structure in each layer using self-assembly of block copolymers. Different functional nanomaterials are selectively introduced in different layers with controlled arrays and network form…
A germanium–vanadate cluster [Ge5V6O21(heda)6] (1) with covalently coordinated N-(2-hydroxyethyl)ethylenediamine (Hheda) was synthesized and crystallographically characterized. The cluster is a new type of GeVO cluster, in which there coexists various oxo-polyhedra of VIV and GeIV, octahedral VO6, VO5N, and GeO4N2, VO…
Synthesis of cleavable PS brushes on the surface of silica particles was reported in this paper. Atom transfer radical polymerization (ATRP) initiator was anchored onto the surface of silica particles via dynamic imine bond, and PS brushes were prepared by surface ATRP of styrene. PS brushes could be cleaved from the…
The influence of chromium doping on the physical properties of ZnO nanoparticles synthesized using a low temperature co-precipitation technique is presented. In particular, we have studied the correlation between the structural and the magnetic properties as a function of chromium concentrations. In order to investiga…
In this work we present innovative materials able to remove in a single, simple and not invasive treatment, different contaminants like starch paste from paper artworks. The materials, based on biocompatible hydrogels, overcome many of the problems usually faced by restorers during the cleaning of paper samples.
The synthesis and mesomorphic properties of a new homologous series of azomesogens, 4-(4′-n-alkoxy benzoyloxy)-3-methoxy phenyl azo-3″,4″ dichlorobenzene is detailed. The first four members of the series are nonmesomorphic, and the other eight members are smectogenic in character. The smectic mesophase, which is exhib…
The optical responses of metal clusters, M8 (M = Au, Ag and Cu), are investigated by the linear response theory based on the density functional theory. Unlike sodium clusters [Yasuike et al., Phys. Rev. A, 2011, 83, 013201], the plasmonic excitations in the present metal clusters are strongly reduced by the background…
Gas phase reactivity observed in an ion trap was used to produce silver clusters protected with thioglycolic acid. Fragmentation pathways as well as optical properties were explored experimentally and theoretically. Sequential losses of SCH2 and CO2 in the ion trap lead to redox reactions with charge transfers between…
Lien vers la version éditeur: http://www.sciencedirect.com/science/article/pii/S2212827113004216
Mixtures of alkylamide derivatives with different alkyl chains were found to form organogels which exhibit thixotropic properties, while single alkylamide components formed organogels which did not exhibit such properties. With a three-component alkylamide system, the transparency and mechanical properties (toughness…
Nanocrystalline SrTiO3 (ST) powders were prepared by the sol-gel combustion method. Citric acid was used as a fuel in combustion reaction. The molar ratio of ST sol: fuel was 1:1, 1:2 and 1:3. ST sol and fuel were calcined at 500–900°C for 2 h. Pure perovskite phase were obtained at low calcinations temperature of 600…
Abstract Two new, 1 and 2 , along with one known isoindolone, 3 , were isolated from the AcOEt extract of Lasiosphaera fenzlii Reich . The structures of these compounds were determined as 4,6‐dihydroxy‐1 H ‐isoindole‐1,3(2 H )‐dione ( 1 ), 4,6‐dihydroxy‐2,3‐dihydro‐1 H ‐isoindol‐1‐one ( 2 ), and clitocybin A ( 3 ) on…
This paper reports on the results of an investigation into the luminescence properties of yttrium and lutetium borates, as well as the Y 0.35 Lu 0.65 BO 3 solid solution, under excitation with the synchrotron radiation in the X-ray and ultraviolet spectral ranges. It has been shown that there exists an intrinsic lumin…
Recently, the efforts in solid-state materials include developing technologies capable of producing ZnO wafers in large dimensions and good quality based device applications. High quality bulk crystals are obtained by growing from high purity the melt. However, the thermochemical properties of ZnO (high melting point…
We investigate photoluminescence emission and absorption of mechanically exfoliated mono- and few-layers of the transition metal dichalcogenides MoS2, MoSe2, and WSe2 and elucidate the nature of the layer-dependent phonon modes via high-resolution Raman spectroscopy.
The effect of anode shapes on pinch structure and X-ray emission of plasma focus device operated with cylindrical, diverging, oval and converging anode tips is reported. The pinch structure in the radial compression phase has been investigated by employing a triple pinhole camera. It has been observed that pinch struc…
The effect of atmospheric aging on the adhesion strength between electroless copper and polyimide films was investigated. 100 nm thick electroless copper was plated on polyimide film and 10 µm of copper electroplating was performed successively. Aging was allowed to occur at room temperature in atmosphere for designat…
Highly ordered templates are of great importance in fabricating well-arranged nanomaterials. Inspired by the hierarchical assembly of bio-macromolecules, we designed a water soluble three-arm ionic aromatic oligoamide which can spontaneously self-assemble into bundles of nanofibrils. Unlike conventional assemblies for…