Materials Literature
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Abstract The present paper reports the successful development of a straightforward clay organo‐modification protocol named “Shear Induced Clay Organo‐modification” process, or SICO. To develop such a fast process, natural montmorillonite has been organo‐modified with cationic starch (surfactant) under shearing. Accord…
Series of alkaline earth aluminoborosilicate glasses were prepared by conventional melt quenching technique. Several studies including infrared spectra, density and dielectric properties of these glasses have been carried out. Infrared spectra indicated that with increasing boron oxide, more borate units were connecte…
Abstract Low‐density polyethylene (LDPE)/silicate nanocomposites were prepared by the melt compounding and solution blend methods using unmodified LDPE polymer and layered silicates with different aspect ratio. X‐ray diffraction (XRD) analysis performed on composites obtained by dispersing the organosilicates in molte…
Laying the groundwork: The interfacial self-assembly properties of an amyloid peptide were used to develop crystalline nanostructures at air-water interfaces, which were studied by both AFM microscopy and X-ray diffraction (see image). These structures generate regular arrays of functional groups and pave the way to c…
A novel, versatile functional mesoporous material with the structure of SBA-15 but a specific 3D net-linked morphology has been prepared by using a facile method. This material has been assessed for its ability to reduce the level of nitrosamines in tobacco smoke so that the actual effect of this material in the reduc…
Intensely luminescent fibers are prepared by the self-assembly of hybrid SiO2-coated CdTe nanocrystals (NCs), SiO2 monomers, and a complex of Cd2+ and thioglycolic acid. These fibers exhibit tunable photoluminescent colors (yellow to red) and morphologies (tubal, solid, and belt-like) with an extremely high concentrat…
Linked to the Pentagon: The addition of molybdate to [HBW(11)O(39)](8-) ions leads to the formation of mixed pentagonal units {W(Mo(5))} and {W(WMo(4))} trapped as linkers in the resulting modular assemblies, thus establishing the first link between the conventional Keggin ion derivatives and the giant molybdenum oxid…
Bulking up: The thermal barrier to rearrangement of a vic-disulfoxide is significantly increased through steric buttressing about the (O)S--S(O) bond. Whereas the title compounds represent the most thermally stable vic-disulfoxides known to date, they also undergo a novel photomediated epimerization at room temperatur…
Abstract Diameter separation of single‐walled carbon nanotubes is achieved via the density gradient ultracentrifugation process. Statistical analysis of the separated samples is performed using high‐resolution transmission electron microscopy (HRTEM). The evolution of the diameter distribution with respect to the grad…
We report on the energy-transfer mechanism between amorphous Si nanoclusters and erbium ions in a ${\text{SiO}}_{2}$ matrix. We have studied a set of optimized samples which show maximum ${\text{Er}}^{3+}$ to Si-nc coupling ratio. We demonstrate that the transfer mainly occurs to the ${^{4}I}_{11/2}$ level in less tha…
The structural relaxation of a glass forming liquid, methyl m-toluate, is studied in the deeply supercooled region near glass transition with the calorimetric and dielectric techniques. The thermodynamics and kinetics of the enthalpy relaxation are focused, and the kinetic studies are paralleled with dielectric relaxa…
We derive the effective action for superconducting fluctuations in a four-band model for pnictides, discussing the emergence of a single critical mode out of a dominant interband pairing mechanism. We then apply our model to calculate the paraconductivity in two-dimensional and layered three-dimensional systems and co…
The templated growth of gold nanoparticles in 3D arrays within the nanopores of unicellular diatoms involves pretreament of the skeletons with poly(vinylpyridine) which has a unique dewetting property. This self-assembly provides a nanochemical analogue of lithography for engineering complex nanostructures. The proces…
Motivated by the very recent fabrication of sub-10-nm-wide semiconducting graphene nanoribbons [X. Li et al., Science 319, 1229 (2008)], where some of their band gaps extracted from transport measurements were closely fitted to density-functional theory predictions for magnetic ordering along zigzag edges that is resp…
Four-terminal resistances, both longitudinal and diagonal, of a locally gated graphene device are measured in the quantum-Hall (QH) regime. In sharp distinction from previous two-terminal studies [J. R. Williams et al., Science 317, 638 (2007); B. \"Ozyilmaz et al., Phys. Rev. Lett. 99, 166804 (2007)], asymmetric QH r…
Polyhydroxyalkanoates (PHA) terployesters P(3HB-co-3HV-co-3HHx) consisting of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), and 3-hydroxyhexanoate (3HHx) were produced by wild-type Aeromonas hydrophila 4AK4, its recombinant harboring PHA synthesis genes phaPCJ encoding PHA binding protein phasin, PHA synthase, and…
Abstract Composites with polyvinyl chloride (PVC) as major matrix constituent, ethylene vinyl acetate (EVA) as polymeric plasticizer and wood flour (WF) and fly ash (FA) as filler were extruded. Morphology of the samples was studied using scanning electron microscopy (SEM). Morphological study indicated good dispersio…
We report the synthesis, as well as the complex thermal and assembling properties, of a series of three triblock copolymers 1 − 3, each of which is based on aliphatic polyether third-generation dendron ends that contain tetradecyl peripheries and a hydrophilic linear poly(ethylene oxide) (PEO) middle block. Because of…
Single-walled carbon nanotubes (SWCNTs) were synthesized using ethanol CVD to study the nucleation kinetics of nanotube growth. By counting the number density of SWCNTs, i.e., the number of nanotubes per unit area on the substrate, the nucleation process of SWCNT growth was studied extensively within a wide range of g…
Abstract The structure and magnetic properties of double azido‐bridged Cu II binuclear complex 1 with the chelating chiral ligand ( S , S )‐2,2′‐isopropylidenebis(4‐phenyl‐2‐oxazoline) were analyzed by combining experimental and theoretical techniques. The Cu II ions adopt a square pyramidal geometry with different de…