Self-assembled bismuth nanocrystallites
Using a high-temperature organic solution reduction method, highly crystalline and single domain bismuth nanoparticles have been synthesized and self-assembled.
Materials Literature
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Real-time FTIR and WAXS studies of drawing behavior of poly(ethylene terephthalate) films
The development of molecular orientation and crystallization was studied during uniaxial drawing of poly(ethylene terephthalate) (PET) films, which was immediately followed by subsequent taut annealing at the drawing temperature. The behavior was monitored in real time throughout the drawing and annealing using dynami…
Very high titanium content mesoporous silicas
Titanium content in mesoporous titanosilicate catalysts has been modulated up to a minimum Si/Ti value of 1.9 by using complexing agents able to coordinate both Si and Ti atoms and harmonize the reactivity of the resulting precursors avoiding subsequent phase segregation and leading to chemically very homogeneous mate…
Electrochemical Deposition of Smooth and Homogeneously Mesoporous ZnO Films from Propylene Carbonate Electrolytes
Nanoporous ZnO films have been electrodeposited on transparent conductive supports using an electrolyte of and in propylene carbonate (PC). Varying the salt concentrations, water content, and voltage gives wide control over the morphology and porosity of the films. For 0.15 M and 0.05 M ZnCl, the resulting ZnO films c…
Reduced protein adsorption and platelet adhesion by controlled variation of oligomaltose surfactant polymer coatings
A series of oligomaltose surfactant polymers were prepared by the simultaneous coupling of hydrophilic maltolactone [of 2(M2), 7(M7), or 15(M15) glucose units] and hydrophobic N-(hexanoyloxy)succinimide (Hex) groups to the amino groups of a poly(vinyl amine) backbone. The surfactants were characterized by FTIR and 1H-…
Quaternary Znx′Cdy′Mg1−x′−y′Se/ZnxCdyMg1−x−ySe quantum wells grown on InP substrates for blue emission
Quaternary Znx′Cdy′Mg1−x′−y′Se/ZnxCdyMg1−x−ySe quantum well (QW) structures in which both the well and the barrier layers are composed of quaternary alloys lattice matched to InP and having various well thicknesses have been grown and investigated. A blue emission with narrow linewidth was achieved by using a relative…
Comparative study of physical properties of water-blown rigid polyurethane foams extended with commercial soy flours
The use of renewable resources (mainly carbohydrates) in rigid polyurethane foam has been known to offer several advantages, such as increased strength, improved flame resistance, and enhanced biodegradability. Less attention has been directed to inexpensive protein-based materials, such as defatted soy flour. The obj…
Generation of cluster capsules (Ih) from decomposition products of a smaller cluster (Keggin-Td) while surviving ones get encapsulated: species with core–shell topology formed by a fundamental symmetry-driven reaction
A novel and fundamental reaction system of matter following a type of ‘supramolecular Darwinism’ leads to the formation of giant spherical nano-sized cluster capsules as kinetically controlled destination having the highest possible symmetry (Ih) and formed directly from the decomposition products of the well known bu…
Cell behavior on laser surface-modified polyethylene terephthalatein vitro
This work has been undertaken to study the cell behavior of L929 fibroblasts on the laser irradiated polyethylene terephthalate (PET) surface. To modify the surface properties of the PET, CO2 pulsed laser at the wavelength of 9.25 microm and KrF excimer laser at 248 nm with various number of pulses were used. Laser ir…
Catalytic conversion of butadiene to ethylbenzene over the nanoporous nickel(ii) phosphate, VSB-1
The large-pore nickel(II) phosphate, VSB-1, shows excellent selectivity (>80%) for the dehydrocyclodimerization of butadiene to ethylbenzene at 400 °C; conversion to 4-vinylcyclohexene and oligomeric byproducts is <5% in each case.
Metal and ligand control in di- and octa-nuclear cluster formation †
Reaction of doubly negatively charged m-pyridinediyl spacered bis-bidentate ligands with iron(III) chloride in the presence of alkaline, alkaline earth, and rare earth metal cations (Mn+) yielded {2}-iron cryptates {M⊂[Fe2(L)3]}n+. The mono-, di-, and tri-valent guest cations are endohedrally encapsulated in the cavit…
Thermoelectric Properties of NaCo2-xCuxO4 Improved by the Substitution of Cu for Co
We prepared a set of polycrystalline samples of the thermoelectric oxide Na 1.2 Co 2- x Cu x O 4 ( x =0, 0.1, 0.2 and 0.3), and investigated the Cu substitution effects on their thermoelectric properties. The substituted Cu significantly enhances the thermopower over the temperature range from 4 to 300 K, whereas it d…
Bioelectronic applications of photochromic pigments
The actuality of the topics of the book is given by the developments in an emerging field of interdisciplinary applied research called biomolecular electronics. This young and dynamically developing discipline has grown out of the field of conventinal electronics and computer technology. From the early 1960s on, the a…
Ice XII forms on compression of hexagonal ice at 77 K via high-density amorphous water
Samples of high-density amorphous water (HDA) were prepared by compression of hexagonal ice (ice Ih) in a piston-cylinder apparatus at 77 K up to 1.8 GPa, recovered at ambient pressure under liquid N2 and characterized by X-ray diffraction and differential scanning calorimetry. Thereafter HDA samples were reloaded int…
Prediction of high pressure phases in the systems Li3N, Na3N, (Li,Na)3N, Li2S and Na2S
The prediction of high pressure phases of a chemical system is realized as a two-step process: identification of structure candidates through the global exploration of their energy landscapes over a range of different pressures, followed by a limited local optimization using ab initio methods. The application of this…
Thermal characterization of polycarbonate/polycaprolactone blends
In this work, we prepared blends of bisphenol A polycarbonate (PC) and poly(ϵ-caprolactone) (PCL) in a wide composition range by melt mixing and solution mixing. Two different molecular weights of PCL were used (nominally, 10.000 g/mol, PCL10, and 80.000 g/mol, PCL80). The thermal behavior of both systems was studied…
Surface resistance measurements on nonceramic insulators
The results and analysis of surface resistance measurements performed on nonceramic insulators (NCI) are presented in this paper. The goal of this study was to determine if the surface resistance measurement procedure can be formalized to ensure repeatable and reproducible results. The NCIs evaluated had housing mater…
Amino-terminal Polypeptides of Vimentin Are Responsible for the Changes in Nuclear Architecture Associated with Human Immunodeficiency Virus Type 1 Protease Activity in Tissue Culture Cells
Electron microscopy of human skin fibroblasts syringe-loaded with human immunodeficiency virus type 1 protease (HIV-1 PR) revealed several effects on nuclear architecture. The most dramatic is a change from a spherical nuclear morphology to one with multiple lobes or deep invaginations. The nuclear matrix collapses or…
Self diffusion of Si and O in dacitic liquid at high pressures
Laboratory experiments have been conducted to determine simultaneously the self diffusivities of Si and O in synthetic dacite melt (NBO/T = 0.1) from 1 to 5.7 GPa and from 1355 to 1662 °C. Glasses enriched in 18 O and 28 Si were synthesized and mated to their isotopically normal counterparts to form diffusion couples…
Lanthanide triple helical complexes with a chiral ligand derived from 2,6-pyridinedicarboxylic acid†
The ligand 3-[2,6-bis(diethylcarbamoyl)pyridine-4-yl]-N-(tert-butoxycarbonyl)alanine methyl ester (L4) bearing a chiral group in the 4-position of the pyridine ring has been synthesised and its interaction with trivalent lanthanide ions studied. L4 yields stable [Ln(L4)3]3+ complexes in acetonitrile, with logβ3 in the…