ChemInform Abstract: Noncentrosymmetric Inorganic Oxide Materials: Synthetic Strategies and Characterisation Techniques
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Tunable light diffractor associated with liquid crystal molecular reorientation from homogeneous alignment to periodic twist deformation in micrometre scale
We have demonstrated the formation of a transmissive tunable light diffractor with a fine grating period using a fringe-field switching (FFS) device. The presented device operates as a superposed amplitude and phase grating. The phase grating is formed by a thin slab of a nematic liquid crystal (LC) film and the ampli…
Electrogenerative Removal of Cobalt from Sulfate Solutions Using a Batch Reactor
Abstract The electrogenerative removal of cobalt is conducted in a batch reactor equipped with three‐dimensional electrodes: Reticulated vitreous carbon (RVC) and porous graphite (PG‐25) as cathode materials. In this process, a chemical reaction takes place spontaneously in a divided cell where cobalt is reduced at th…
Ultrafast Charge Separation at the CdSe Quantum Dot/Methylviologen Interface: Dependence on Electron Acceptor Concentration
Abstract Photoinduced charge transfer dynamics between CdSe semiconductor quantum dots (QDs) and the molecular acceptor methylviologen (MV 2+ ) were investigated by time resolved absorption spectroscopy. Biexponential behavior of the charge separation is observed and explained by different donor states involved in the…
A density functional study on dielectric properties of acrylic acid grafted polypropylene
Influence of acrylic acid grafting of isotactic polypropylene on the dielectric properties of the polymer is investigated using density functional theory (DFT) calculations, both in the molecular modeling and three-dimensional (3D) bulk periodic system frameworks. In our molecular modeling calculations, polarizability…
Depth sensitive Fourier-Scatterometry for the characterization of sub-100 nm periodic structures
Recently Fourier-Scatterometry has become of increasing interest for quantitative wafer metrology. But also in other fields the fast and precise optical characterization of periodical gratings of sub 100 nm size is of great interest. We present the application of Fourier-Scatterometry, extended by the use of the coher…
Novel sulfobutyl ether cyclodextrin gradient leads to highly active liposomal irinotecan formulation
OBJECTIVES: Liposomal delivery of irinotecan could provide protection against drug hydrolysis, deliver more active lactone form to tumours and prolong irinotecan exposure time. Nevertheless, conventional drug-loading technologies have typically resulted in undesired drug retention properties. To resolve the problem, a…
Cohesive strength of nanocrystalline ZnO:Ga thin films deposited at room temperature
In this study, transparent conducting nanocrystalline ZnO:Ga (GZO) films were deposited by dc magnetron sputtering at room temperature on polymers (and glass for comparison). Electrical resistivities of 8.8 × 10-4 and 2.2 × 10-3 Ω cm were obtained for films deposited on glass and polymers, respectively. The crack onse…
Immobilization of Polymethyl Methacrylate Brushes on Hydroxyapatite under Molecular Weight Control
Polymethyl methacrylate (PMMA) brushes with a quantitative molecular weight ( M w ) and low polydispersity index are synthesized via atom transfer radical polymerization and grafted onto the surfaces of hydroxyapatite (HA) that were modified with γ-methacryloxypropyl trimethoxysilane (MPTS). The structure and morpholo…
Low cost fabrication of diamond nano-tips on porous anodic alumina by hot filament chemical vapor deposition and the field emission effects
A novel growth method for diamond nano-tips on porous anodic alumina (PAA) by hot filament chemical vapor deposition has been investigated for the first time. Before diamond film deposition could be carried out, nano-diamond particles were deposited onto the pore surface of PAA by electrophoretic deposition at the nuc…
High‐pressure Raman investigation of the semiconductor antimony oxide
Abstract The in situ high‐pressure behavior of the semiconductor antimony trioxide (Sb 2 O 3 ) has been investigated by Raman spectroscopy techniques in a diamond anvil cell up to 20 GPa at room temperature. New peaks in the external lattice mode range emerged at a pressure above 8.6‐15 GPa, suggesting that the struct…
Effect of temperature in synthesis of silver nanoparticles in triblock copolymer micellar solution
Knowing that poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (PEO–PPO–PEO) in aqueous solution is thermoresponsive, the effect of temperature on formation and stabilisation of silver nanoparticles has been investigated systematically. Synthesis of silver nanoparticles was achieved from silver ammonia c…
Enhanced thermal conductivity of semi‐aliphatic liquid crystalline polybenzoxazoles using magnetic orientation
Abstract Polybenzoxazole (PBO) model compounds consisting of benzoxazole mesogenic units linked with long alkyl chains via ether or ester groups were prepared from flexible dicarboxylic acids with two kinds of bis( o ‐aminophenol)s, i.e. 4,4′‐diamino‐3,3′‐dihydroxybiphenyl ( p ‐HAB) and 3,3′‐diamino‐4,4′‐dihydroxybiph…
Nanoveneers: An Electrochemical Approach to Synthesizing Conductive Layered Nanostructures
We report herein a facile electrochemical approach to synthesizing various layered composite films of nanomaterials and conducting polymers, called nanoveneers. Layered structures of polypyrrole film with single-walled carbon nanotubes (SWNTs), graphene, and Au nanoparticles have been obtained by electropolymerization…
Induced electro-optic effects in single-walled carbon nanotubes. I. Polarizability of metallic nanotubes
The polarizability of single-walled carbon nanotubes (SWNTs) results in an induced dipole moment which in turn allows their alignment, when in suspension, in an applied electric field. The consequent introduction of anisotropy into what was a previously isotropic suspension of SWNTs gives rise to induced optical effec…
FIRST PRINCIPLES STUDY OF THE STRUCTURAL, ELASTIC AND ELECTRONIC PROPERTIES OF Ti2InC and Ti2InN
The structural, elastic and electronic properties of Ti 2 InC and Ti 2 InN compounds have been calculated using the full-potential linear muffin-tin orbital (FP-LMTO) method. The exchange and correlation potential is treated by the local density approximation (LDA). The calculated ground state properties, including, l…
Luminescence from laser-induced bubbles in water-glycerol mixtures: Effect of viscosity
The luminescence pulses emitted from collapsing laser-induced bubbles in water-glycerol mixtures are studied as a function of the mixture concentration and applied hydrostatic pressure. The primary effect of increasing the glycerol concentration is to increase the viscosity of the fluid. The pulse duration of the lumi…
Aerobic Oxidation of Cyclic Amines to Lactams Catalyzed by PVP-Stabilized Nanogold
Gold nanoclusters stabilized by poly(N-vinyl-2-pyrrolidone) (Au:PVP) are active and selective catalysts under aerobic conditions for oxidation of cyclic secondary amines at the α-position of the nitrogen atom. The catalyst accelerates the formation of the imines by oxidation of the amines in aqueous solvent to afford…
Modeling three-dimensional network formation with an atomic lattice model: Application to silicic acid polymerization
We present an atomic lattice model for studying the polymerization of silicic acid in sol-gel and related processes for synthesizing silica materials. Our model is based on Si and O atoms occupying the sites of a body-centered-cubic lattice, with all atoms arranged in SiO(4) tetrahedra. This is the simplest model that…
Antiferromagnetic Order in Multiband Hubbard Models for Iron Pnictides
We investigate multiband Hubbard models for the three iron 3d t(2g) bands and the two iron 3d e(g) bands in LaOFeAs by means of the Gutzwiller variational theory. Our analysis of the paramagnetic ground state shows that neither Hartree-Fock mean-field theories nor effective spin models describe these systems adequatel…