Materials Literature
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The interaction between gold nanoparticles in apolar solvents and polypyrrole or polythiophene films of varous types is investigated. Regular and full monolayers and multilayers are produced via solution processing using gold nanoparticles and soluble polypyrrole or poly(3,4-ethylenedioxythiophene). The new layered ma…
We report pinning of the emission spectrum in ultrasmall CdSe nanocrystals with a diameter of 1.7 nm and smaller. It was observed that the first emission feature ceased to blueshift once the band edge absorption reached 420 nm, though the band edge absorption continued to blueshift with decreasing nanocrystal diameter.
Long uniaxial edge-on nanocolumnar stacks of dodecyl-substituted hexa-peri-hexabenzocoronene grow spontaneously at the liquid/solid interface as a result of a hierarchical self-assembly process. Supramolecular multilayered architectures as complex as {HOPG/face-on/edge-on/edge-on} and {HOPG/face-on/edge-on/face-on} ar…
Switching aggregation on and off: Electrostatic self-assembly in aqueous solution allows formation of supramolecular structures that can be switched “on” and “off” by pH. Thereby a reversible change between 5 nm building blocks and 150 nm assemblies occurs, while the color of the solution switches between red and yell…
The primary Bjerknes force is responsible for the quick translational motion of radially oscillating bubbles in a sound field. The problem is classical in the case of small-amplitude oscillations, for which an analytical expression of the force can be easily obtained, and predicts attraction of sub-resonant bubbles by…
In this article, the effects of the transmission electron microscopy (TEM) specimen preparation techniques, such as ion milling and tripod polishing on perovskite oxides for high-resolution TEM investigation, are compared. Conventional and liquid nitrogen cooled ion milling induce a new domain orientation in thin film…
The reaction of [(p-cym)Ru(bpy)Cl](+) (p-cym = eta(6)-p-cymene; bpy = 2,2'-bipyridine) with SCN(-) gives a mixture of the linkage isomers [(p-cym)Ru(bpy)(SCN)](+) and [(p-cym)Ru(bpy)(NCS)](+). The linkage isomers were efficiently separated by column chromatography on Hg(NO3)2-coated Al2O3. Both isomers were fully char…
Polarization of electric double layers of colloidal rods due to an external alternating electric field is found to give rise to several phase/state transitions. Various phases and states are observed depending on the frequency and amplitude of the external electric field: i) non-chiral nematic domains ( N -domains) in…
Abstract Biocomposites having flax fibers as reinforcement in wheat flour based thermoplastic matrix were prepared by extrusion method. The fiber content of the composites varied from 0% to 20% w/w. The structure and morphology of the fiber and composites prepared were studied using X‐ray diffraction and scanning elec…
We show that the number of concentric graphene cylinders forming a carbon nanotube can be found by squeezing the tube between an atomic force microscope tip and a silicon substrate. The compressed height of a single-walled nanotube (double-walled nanotube) is approximately two (four) times the interlayer spacing of gr…
The three-dimensionally ordered macroporous (3DOM) ZrO2: Er(3+), Yb(3+) materials were successfully synthesized by the sol-gel method combined with a polystyrene latex sphere templating technique, and their morphologies, surface physicochemical properties, and upconversion photoluminescence (UC-PL) properties were stu…
Two novel tris( tert -butoxy)siloxy complexes of Pt(II) and Pt(IV) were prepared in high yields, (cod)Pt[OSi(O t Bu) 3 ] 2 ( 1; 87%; cod = 1,5-cyclooctadiene) and Me 3 Pt(tmeda)[OSi(O t Bu) 3 ] ( 2; 81%; tmeda = N, N, N′, N′ -tetramethylethylenediamine). The structures of these compounds were determined by multinuclea…
Boron compounds are included in the family of mullite-type structures if they contain chains of edge-sharing M O 6 octahedra ( M are the octahedrally coordinated cations in the chains) similar to those in mullite. The crystal structures of all boron compounds in the mullite family are derived from a tetragonal aristot…
An Al-rich tourmaline from the Sahatany Pegmatite Field at Manjaka, Sahatany Valley, Madagascar, was structurally and chemically characterized. The combination of chemical and structural data yields an optimized formula of X (Na0.53Ca0.09□0.38) Y (Al2.00Li0.90Mn2+0.09Fe2+ 0.01) Z Al6 (BO3)3 T [Si5.61B0.39]O18 V (OH)3…
Abstract This article deals with (1) synthesis of novel cyclic carbonate monomer (2‐oxo [1,3]dioxan‐5‐yl)carbamic acid benzyl ester (CAB) containing protected amino groups; (2) ring‐opening copolymerization of the cyclic monomer with L ‐lactide (LA) to provide novel degradable poly(ester‐carbonate)s with functional gr…
The combined use of cryo-TEM, dynamic light scattering, and small-angle X-ray and neutron scattering techniques allows a detailed structural model of complex pharmaceutical preparations of soybean lecithin/chitosan nanoparticles used as drug vectors to be worked out. Charge-driven self-organization of the lipid(-)/pol…
The design of perfect electromagnetic cloaks is usually based on the coordinate transformation method. However, for cloaks with arbitrary shapes, it is difficult to express analytically such coordinate transformation. Thus, we have to resort to numerical methods to design approximate cloaks. In this paper, we propose…
Stable homogeneous aqueous dispersions of pristine single-walled carbon nanotubes (SWNTs) are obtained by using a water-soluble long-chain imidazolium ionic liquid (hvimBr) above its critical micelle concentration. The amount of hivmBr and the sonication time are two essential factors to obtain a good dispersion. The…
Molecular dynamics simulations and neutron scattering experiments have shown that many hydrated globular proteins exhibit a universal dynamic transition at TD = 220 K, below which the biological activity of a protein sharply diminishes. We studied the phononlike low-energy excitations of two structurally very differen…
Silver telluride nanowires have been synthesized by the composite-hydroxide-mediated (CHM) method at temperatures of 180−225 °C. The products were single-crystalline nanowires and monoclinic phase Ag 2 Te with a high purity. The reversible structural phase transition from monoclinic structure (β-Ag 2 Te) to face-cente…