Materials Literature
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Clusters of ReO(x) are formed and attached to Pt metal particles during H(2) reduction treatment on Pt-ReO(x)/SiO(2), and the synergy between Pt metal surface and neighboring ReO(x) clusters gives high catalytic performance in the preferential CO oxidation in the presence of H(2)O and CO(2) as more realistic reaction…
Spherical particles whose surfaces are divided into two distinct chemical regions are termed Janus particles. The anisotropic architecture of Janus particles allows their directed assembly into multiple-particle structures. Here, a heteroaggregation technique between positively charged poly(2-vinylpyridine) microgel p…
Photobleaching and spectral diffusion (blue shift) of quantum dots at the solid/liquid interface are suppressed by adding mercaptoethylamine.
A straightforward strategy is presented to functionalize aqueous-phase synthesized CdTe quantum dots (QDs) with thermo-sensitive poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) via direct surface-initiated oxyanionic vinyl polymerization. The polymer grafting quantity can be facilely controlled in a wide range up…
We study the evolution of the elastic shear modulus of weakly aggregated colloidal particles during the onset of a delayed collapse under gravity. The early lifetime is characterised by an elastic shear modulus that increases logarithmically in time, following which the gels experience a catastrophic failure and the e…
HiPco and CoMoCAT single-walled carbon nanotubes (SWCNT) were fractionated with the aid of a novel perylene bisimide surfactant by combined co-surfactant and replacement density gradient ultracentrifugation (DGU).
In the current study, mechanical and tribological characteristics of neat polyester and its composites were evaluated. Polyester composites were based on either synthetic or natural fibres, i.e. chopped strand mat glass fibres reinforced polyester (CGRP) and oil palm fibres reinforced polyester (OPRP) composites. Abra…
Silver-perovskite composites with the perovskite being either (LSCF) or (LSM) were evaluated as the contact material between the ferritic interconnect alloy Crofer 22 APU and the LSM cathode. The area-specific resistances (ASRs) of the test specimens were highly dependent on the volume percentage and the type of the p…
Among emerging memory technologies that rely on the bistable change of a resistor, the conductive bridging random access memory (CBRAM) is of particular interest due to its excellent scaling potential into the sub-20 nm range and low power operation. This technology utilizes electrochemical redox reactions to form nan…
Based on ab initio calculations, we have studied the geometrical, electronic properties and chemical bonding of boron fullerenes B(32+8k) (0 < or = k < or = 7) with four-membered rings and B(32) solid phases. The relative energies and the energy gaps between the highest occupied molecular orbital (HOMO) and the lowest…
We have measured and reconstructed via forward modeling a small volume of microstructure of high purity, well annealed nickel using high energy x-ray diffraction microscopy (HEDM). Statistical distributions characterizing grain orientations, intra-granular misorientations, and nearest neighbor grain misorientations ar…
In recent years, Fourier spectral methods have emerged as competitive numerical methods for large-scale phase field simulations of microstructures in computational materials sciences. To further improve their effectiveness, we recently developed a new adaptive Fourier-spectral semi-implicit method (AFSIM) for solving…
There has been a growing interest in utilizing natural fibers as reinforcement in polymer composite for making low cost construction materials in recent years. The present paper surveys the research work published in fiber reinforced polymer composite materials with reference to electrical properties such as volume re…
4-Piperidone and 4-alkyl piperidones react selectively with aromatic hydrocarbons in a mixture of trifluoromethanesulfonic acid (TFSA) and CH(2)Cl(2) to give linear polymers, while N-(2-phenethyl)piperidone undergoes self-polymerization to yield virtually 100%-hyperbranched polymer.
A mast cell/fibroblast co-culture system is used as a model to assess the toxicity of Au nanoparticles over the course of 72 hours of exposure. Cellular uptake of nanoparticles was found to increase over the 72 hr exposure period and the nanoparticles localized within granular bodies of the primary culture mast cells.…
A homologous series of liquid-crystalline compounds with an azo-group in the molecular core have been synthesized. A tendency for the layer shrinkage at the SmA–SmC* phase transition to decrease with decreasing alkyl chain length (n) was observed, with one homologue exhibiting almost no change in layer spacing. All st…
Ladder polysilsesquioxanes containing ammonium chloride and chiral groups as side-chains were prepared by sol–gel copolycondensation of 3-aminopropyltriethoxysilane and chiral organotriethoxysilane under acidic conditions, forming chiral conformations and hexagonal stacking structures.
A polypyrrole-intercalated layered manganese oxide nanocomposite has been synthesized by a delamination∕reassembling process. X-ray diffraction analysis shows that the basal spacing of the nanocomposite is . The room-temperature conductivity of the nanocomposite is found to be , which is 4–5 orders of magnitude higher…
15-Membered tri-olefinic azamacrocycles as end-groups of phosphorus-containing dendrimers from generation 1 to 4 are used for obtaining Pt nanoparticles in mild conditions; remarkable and unprecedented branched supramolecular assemblies composed of dendrimers and coalesced Pt nanoparticles are obtained, which become l…
A trinuclear copper(II) complex with inositol and 2,2'-bipyridine forms a fibrous hydrogel at pH 12.4, the assembly of discrete trinuclear complex molecules to form the metallogel being assisted by H-bonding and inter- and intramolecular pi-stacking between the bipyridyls.