Materials Literature
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Anatase particles (40-60 nm) were coated with an organosilane monolayer terminated with an ethylenediamine (EDA) ligand. These functionalized nanoparticles (FNPs) were then treated with an aqueous solution of Cu(II) to create a cationic Cu-EDA complex bound to the nanoparticle surface. Cu(II) and EDA ligand incorporat…
Blends of high-density polyethylene and polypropylene are foamed by means of extrusion using azodicarbonamide as a chemical blowing agent to study the effect of blending on the morphological and mechanical properties. At 0.5 wt% of blowing agent, optimum foam density is found to be around 417 kg/m 3 for each blend com…
We present the synthesis, as well as the structural and magnetic characterization, of [Ru2(D(3,5-Cl2Ph)F)4Cl(0.5H2O)].C6H14 (D(3,5-Cl2Ph)F = N,N'-di(3,5-dichlorophenyl)formamidinate), a Ru2(5+) compound having a 4B(2u) ground state derived from a sigma2pi4delta2pi2delta electron configuration. The persistence of this…
Synthesis and characterization of new hexabenzocoronene (HBC) derivatives bearing perfluoroalkylated chains are described. These disc-shaped polycondensed aromatic hydrocarbons are known to self-assemble by π-stacking into columnar architectures. The peripheral decoration with perfluorinated chains, well-known for the…
The cold-active alpha-amylase from the Antarctic bacterium Pseudoalteromonas haloplanktis (AHA) is the largest known multidomain enzyme that displays reversible thermal unfolding (around 30 degrees C) according to a two-state mechanism. Transverse urea gradient gel electrophoresis (TUG-GE) from 0 to 6.64 M was perform…
The dispersion of pristine and nitric acid-treated single-wall carbon nanotubes (SWNTs) has been studied in organic solvents and solvent mixtures using optical absorption, as a function of settling time. The extinction coefficients of both the pristine and acid-treated tubes at 500-nm wavelength was measured to be 25.…
A thermodynamic equilibrium model has been developed to describe amino acid adsorption on microporous materials. The model addresses electrostatic, hydrophobic and steric interactions. A procedure for fitting the model's parameters is presented and should be applicable to the majority of the common 20 amino acids. The…
A new method for preparing porous silicon nitride ceramics with high porosity had been developed by carbothermal reduction of die‐pressed green bodies composed of silicon dioxide, carbon, sintering additives, and seeds. The resultant porous silicon nitride ceramics showed fine microstructure and uniform pore structure…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTFormation of Nanostructured PVDF/PA11 Blends Using High-Shear ProcessingHiroshi Shimizu, Yongjin Li, Akira Kaito, and Hironari SanoView Author Information National Institute of Advanced Industrial Science and Technology, Nanotechnol…
Collagen, a protein widely used to control cell-material interactions, is known to self-assemble in solution. Supramolecular structures also form on material surfaces following collagen adsorption. Herein, we report the use of anisotropic, flat, surface chemical nanopatterns, which consist of alkyl-terminated tracks d…
Nanosized montmorillonite clay dispersed in small amounts in polymer results in polymer nanocomposites having superior engineering properties compared to those of the native polymer. These nanoinclusions are created by treating clay with an organic modifier which makes clay organophilic and results in intercalation or…
Polycrystalline $\mathrm{La}{\mathrm{Mn}}_{0.5}{\mathrm{Fe}}_{0.5}{\mathrm{O}}_{3}$ is synthesized by a low-temperature method and the magnetic properties of the resulting powder have been studied after annealing the sample in air at different temperatures in the range $200\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\els…
Well-defined dialkylaluminum alkoxides derived from 2-methoxyethanol [R 2 Al(μ-OCH 2 CH 2 OMe)] 2 [where R = Me ( 1a ) and t Bu ( 1b )] and rac -ethyl lactate [Me 2 Al(μ-OCH(Me)CO 2 Et)] 2 ( 2 ) were used as model complexes mimicking intermediate species in the initiation and propagation steps in the ring-opening poly…
Dispersible Mn3O4, CoO, and CuOx nanocrystals were synthesized via thermolysis of simple, generic molecular precursors (metal formates) in hot surfactant (oleylamine/oleic acid) solutions, which showed two-dimensional ordering on copper grids. The metal valence states in the final products were found to depend upon co…
In this work, the feasibility to develop micelle carriers of griseofulvin based on PLA-PEG copolymers was investigated. With the use of the dialysis method of micelle formation, the micellization behavior of a range of PLA(X)-PEG(5) copolymers was investigated. At copolymer concentrations in the organic solvent 10-20…
The electrical, optical, and electrochemical properties of an optically transparent diamond electrode are reported on and compared with those of a commonly used optically transparent electrode (OTE), indium tin oxide (ITO). The OTE was formed by coating a thin film (ca. 0.5−1 μm) of boron-doped diamond on quartz. The…
The novel spirobifluorene diamine monomer, 2,7-bis-amino-2‘,7‘-di- tert -butyl-9,9‘-spirobifluorene, was obtained. The new organosoluble polyimides were prepared from spirobifluorene diamine containing bulky tert -butyl group and conventional dianhydrides as well as 2,2‘-bis(4‘ ‘- tert -butylphenyl)-4,4‘,5,5‘-biphenyl…
Impurities affect the nucleation, growth, and structure of crystals. Here we report the effect of large, spherical, polymethylmethacrylate impurities on the crystal growth of monodisperse, hard, polymethylmethacrylate colloids in a density- and optically matching apolar solvent mixture. Crystal growth, initiated at th…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTChemical Synthesis of Highly Conducting Polypyrrole Nanofiber FilmAimei Wu, Harsha Kolla, and Sanjeev K. ManoharView Author Information Alan G. MacDiarmid Center for Innovation, Department of Chemistry, The University of Texas at Dallas…
Optical properties of the Ce:YAG glass-ceramic (GC) phosphor for the white LED were investigated. Concentration dependence of fluorescence intensity of Ce<sup>3+</sup>:5d→4f transition in the GC showed a maximum at 0.5mol%Ce<sub>2</sub>O<sub>3</sub>. Quantum efficiency (QE) of Ce<sup>3+</sup> fluorescence in the…