Materials Literature
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Two different synthesis/sintering routes are proposed in this work for the preparation of fully dense 2ZrB 2 −SiC ultra-high-temperature ceramic (UHTC) composites. Both processes start from commercial powders of zirconium, boron carbide (B 4 C), and silicon, and both take advantage of the spark plasma sintering (SPS)…
Clusters based on the mixed-valence gigantic inorganic ring [Mo154O462H14(H2O)70]14- ({Mo154}-ring) and dimethyldioctadecylammonium (DODA) were combined to form novel molecular assemblies of an inorganic-organic hybrid molecular system as Langmuir-Blodgett (LB) and cast films. (DODA)20[Mo154O462H8(H2O)70] (2) was prep…
The glass transition temperatures of $\mathrm{Ag}\mathrm{P}{\mathrm{O}}_{3}$ have been reported to lie in the $163<{T}_{g}<192\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ range. These results are typical when precursors are processed at laboratory ambient. In the present work, we sho…
The evolution of transient concentration profiles in nanoporous materials is shown to provide direct information about the rate of molecular exchange at the interface of these materials with the surrounding atmosphere. This includes the quantitation of a surface permeability and, related with each other, of the sticki…
Abstract Phosphorous‐doped (ZnO:P) and undoped ZnO wires with diameter of several micrometers and length of several hundred micrometers were thermally grown directly on phosphorus pentoxide doped and undoped ZnO:graphite targets, respectively. The cathodoluminescence spectra of single ZnO:P microwires show three typic…
Water-soluble regioregular head-to-tail zwitterionic fluorescent conjugated boronic acid-bearing polythiophene (polymer 2) was prepared through a postpolymerization quaternization of a pyridine group of 3-pyridineboronic acid with bromide groups of regioregular head-to-tail poly(3-bromohexylthiophene) (polymer 1). Tit…
An experimentally motivated model is proposed for the formation of fluid-phase templates corresponding to the porous silica skeletons of diatoms, single-cell organisms found in marine and freshwater environments. It is shown that phase-separation processes on a planar surface may give rise to a quasi-static mold that…
Solutions containing oppositely charged nanoparticles (NPs) deposit "patchy" coatings of alternating charge distribution on various types of materials, including polymers, elastomers, and semiconductors. Surface adsorption of the NPs is driven by cooperative electrostatic interactions and does not require chemical lig…
A novel design of the functionally graded near-equiatomic NiTi shape memory alloys that exhibit expanded ranges of transformation temperature and stress is developed. The approach utilises the sensitivity of the alloys' thermomechanical properties with respect to heat treatment conditions. The functionally graded prop…
Abstract The adsorption of linear and branched C5–C9 alkanes in the temperature range 50–250 °C on mesoporous MCM‐48 material and its microporous/mesoporous variant Zeotile‐2 at low surface coverage is investigated using the pulse chromatographic technique. On MCM‐48, the differences in adsorption between linear and b…
Polycarbonate is the chosen material for covers of automotive displays because it combines high transparency with high breaking strength. The requirements for coatings include an improvement of the scratch resistance and antireflection properties as well as high stability for challenging environmental conditions. A co…
Salts of the pararosaniline dye cation and four polyoxometalate cluster anions have been isolated under both ambient and hydrothermal conditions; structural and initial spectroscopic data are consistent with significant perturbation of ion electronic states induced by charge-assisted N-H---O hydrogen bonds.
We use numerical optimization to study the properties of (1) the class of one-dimensional potential energy functions and (2) systems of point nuclei in two dimensions that yield the largest intrinsic hyperpolarizabilities, which we find to be within 30% of the fundamental limit. In all cases, we use a one-electron mod…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionMulti-Emissive Difluoroboron Dibenzoylmethane Polylactide Exhibiting Intense Fluorescence and Oxygen-Sensitive Room-Temperature Phosphorescence [J. Am. Chem. Soc.2007, 129, 8942−8943].Guoqing Zhang, Jianbin Chen, Sarah J. Pa…
Formation, crystal chemistry, and physical properties were investigated for the solid-solution ${\mathrm{Ba}}_{8}{\mathrm{Pt}}_{x}{\mathrm{Ge}}_{46\ensuremath{-}x\ensuremath{-}y}{◻}_{y}$ ($◻$ is a vacancy) deriving from binary clathrate ${\mathrm{Ba}}_{8}{\mathrm{Ge}}_{43}{◻}_{3}$ with a solubility limit of $\ensurema…
Abstract Complex oxides with perovskite structure are the ideal arena to study a plethora of physical properties including superconductivity, ferromagnetism, ferroelectricity, piezoelectricity and more. Among them, transition metal oxides are especially relevant since they present large electronic correlations leading…
Abstract A microwave‐induced controlled method for the purification of single‐walled carbon nanotubes (SWCNTs) by removing residual metal catalysts and carbonaceous impurities is reported. Compared to conventional strong acid treatment, this one‐step method uses dilute acids and complexing agents and reduces the react…
AFM-based single-molecule force spectroscopy has been used to study the effect of Hofmeister salts and protein hydrophobicity on the adhesion of recombinant spider silk proteins onto solid substrates. Therefore, a molecular probe consisting of a spider silk protein and an AFM tip has been developed, which (i) is a wel…
Light-induced release of biomolecules from inactive precursor molecules represents a powerful method to study cellular processes with high temporal and spatial resolution. Here we report the synthesis and photochemistry of a series of {7-[bis(carboxymethyl)amino]coumarin-4-yl}methyl carboxylates, carbonates, carbamate…
The use of nanoparticles is now expanding well beyond the field of pure materials science. In particular, the modification of the surface functionality is playing a key role in catalysis, sensor applications and immobilisation of biomolecules. The use of coordinated metals on the outer surface of gold nanoparticles is…