Materials Literature
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Abstract A three‐arm star azo side‐chain liquid crystalline (LC) homopolymer, poly[6‐(4‐methoxy‐4‐oxy‐azobenzene) hexyl methacrylate] (PMMAZO), was synthesized by atom transfer radical polymerization (ATRP) method. The polymerization of 6‐(4‐methoxy‐4‐oxy‐azobenzene) hexyl methacrylate proceeded in a controlled/“livin…
Research Article| January 01, 2008 Using phosphorescence as a fingerprint for the Hope and other blue diamonds Sally Eaton-Magaña; Sally Eaton-Magaña 1Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, DC 20375, USA Search for other works by this author on: GSW Google Scholar Jeffrey E. Post; Jeffrey E. Pos…
Polyazomethines including perylene units in the main chain were synthesized via polycondensation of diaminoperylene with aromatic dialdehydes. UV/vis, FT-IR, 1H NMR, 13C NMR and elemental analysis techniques were carried out for the characterization of the synthesized diaminoperylene, dialdehydes and polyazomethines i…
The blood-brain barrier (BBB) regulates the passage of molecules between the bloodstream and the brain. Overcoming the difficulty of delivery drugs to specific areas of the brain is a major challenge. The BBB exerts a neuroprotective function as it hinders the delivery of diagnostic and therapeutic agents to the brain…
Reaction pathways are presented for hydrogen-mediated isomerization of a five- and six-member carbon ring complex on the zigzag edge of a graphene layer. A new reaction sequence that reverses the orientation of the ring complex, or "flips" it, was identified. Competition between the flip reaction and the "ring separat…
Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and PHBHHx-hydroxyapatite (HAP) composite scaffolds have been prepared by phase separation and subsequent sublimation of the solvent for bone tissue engineering. Scanning electron microscopy (SEM), porosity measurement, mechanical tests, and thermogravimertric ana…
The structural, electronic, and magnetic properties of cobalt-benzene complexes (Co(n)Bz(m), n, m = 1-4, m = n, n + 1) have been explored within the framework of an all electron gradient-corrected density functional theory. Sandwich conformations are energetically preferred for the smallest series of n, m = 1-2, rice-…
Abstract Organic/inorganic hybrid star‐like nanocomposites from two different octafunctional cubic silsesquioxane (CSSQ) nano‐cage cores and poly(methyl methacrylate) (PMMA) were synthesized using atom transfer radical polymerization (ATRP) at mild conditions, in which octafunctional octakis(3‐hydroxypropyldimethylsil…
We report the synthesis and structural and magnetic characterization of an original Cu(3) oxidase model. The Schiff base ligand used in the synthesis derives from condensation of acetylacetone with glycine amino acid. The K[Cu(3)(L)(3)(micro(3)-OH)].(H(2)O)(2) complex crystallizes at room temperature in the tetragonal…
Abstract The generalized green synthesis of single‐crystalline KMnF 3 and NH 4 MnF 3 nanorods as well as of their rare‐earth ion doped analogues, possessing reproducible shape and controllable size, has been achieved using a modified template‐directed approach under ambient room‐temperature conditions, with simple ino…
We introduce simple approximate analytical models for phonon specific heat and ballistic thermal conductance of nanowires. The analytical model is in excellent agreement with the detailed numerical calculations based on the solution of the elastic wave equation and is also in good agreement with the ballistic thermal…
Effects of various metal coating (Co, Ti, Pd, W, and Ru) on electronic structures of carbon nanotubes are systematically studied by both ab initio calculations and field-emission experiments. The theoretical results indicate that the adsorption of metal atoms leads to substantial changes in the band structures and wor…
Recent developments have led to the preparation of polymer latices in the size range 0.1–1.0 µ m in the absence of added surface active agents. A method has now been developed using an extension of this procedure to prepare latices with sizes in the range 1 to 4 µ m. The method involves the polymerization of monomer i…
[Zn(H2O)4][Zn2Sn3Se9(MeNH2)] has an open polar framework based on supertetrahedral clusters with a unique double connectivity mode and exhibits a strong second harmonic generation response, excellent acid stability and proton exchange capacity.
The annealing of three (001) twist grain boundaries in silicon, $\ensuremath{\Sigma}25$, $\ensuremath{\Sigma}5$, and $\ensuremath{\Sigma}29$ has been simulated over a range of temperatures up to the melting point. In contrast to earlier work the ground-state structures of all our boundaries at absolute zero are ordere…
Abstract For the first time we report on the electrochemical characteristics of nanometer sized polyhedral graphite onions dispersed amongst arc‐MWCNTs. These are formed during the electric arc discharge method of producing ultrapure MWCNTs (arc‐MWCNTs). The carbon onions are randomly dispersed amongst the arc‐MWCNTs…
Polarization-insensitivity is achieved in a reflective spatial light modulator by laying a quarter-wave plate (QWP) at the incident wavelength directly over the mirror pixels of a silicon backplane, and forming a nematic Freedrickcz cell over the QWP to modulate the reflected phase. To achieve the highest drive voltag…
It has been shown that pulsed ultrasound can influence the amount of surfactant that can adsorb to and decompose at the surface of cavitation bubbles. However, the effect of ultrasound frequency on this process has not been considered. The current study investigates the effect of ultrasound frequency on the pulsed son…
Global kinetics for the oxidation of diesel fuel (DF), propylene (C 3 H 6 ), CO, H 2, and NO were determined over a commercial diesel oxidation catalyst (DOC) with simulated diesel exhaust between 200 and 415 °C over a wide concentration range intended to represent engine exhaust from both conventional and premixed co…
Abstract A novel solution spinning method to produce highly conducting carbon nanotube (CNT) biofibers is reported. In this process, carbon nanotubes are dispersed using biomolecules such as hyaluronic acid, chitosan, and DNA, and these dispersions are used as spinning solutions. Unlike previous reports in which a pol…