Materials Literature
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The density functional theory was used to study systematically the microphase separation of amphiphilic comb block copolymers with hydrophilic backbone and hydrophobic side chains in a selective solvent. The effects of the length of backbone and side chains, the grafted density, as well as solvent quality were investi…
This paper introduces a novel process for well-aligning growth of carbon nanotubes from flames using a uniform magnetic field generated by a permanent magnet. The results show that the magnetic field also improves the crystallinity of graphite sheets. The theoretical calculation revealed that the magnetic force acting…
X-ray diffraction analysis of single crystals of three new arsenates adopting apatite-type structures yielded formula Sr(5)(AsO(4))(3)F for strontium arsenate fluoride, (I), (Sr(1.66)Ba(0.34))(Ba(2.61)Sr(0.39))(AsO(4))(3)Cl for strontium barium arsenate chloride, (II), and Cd(5)(AsO(4))(3)Cl(0.58)(OH)(0.42) for cadmiu…
Abstract The various ratios of recycled polyethylene terephthalate (rPET) into polypropylene (PP) filled with 40 parts chopped rice husk per hundred part of polymer have been studied. Composites were prepared using a corotating twin screw extruder at temperature zones of 165–215, well below 250°C (rPET mp temperature)…
Zinc oxide doped with 1 at.% Eu3+ has been prepared by combustion synthesis using several different reductants. Samples sintered at 800 °C were ∼30 nm in size and Fourier transform IR spectra demonstrated that they were relatively free of contaminants. Ultraviolet and near-ultraviolet laser excited emission spectra sh…
This research aims to propose a continuous micromechanical model for characterizing the mechanical properties of the nanocomposites containing silica nanoparticles embedded in polyimide matrix. The molecular structures of the nanocomposites were established through molecular dynamic (MD) simulation, from which the non…
Polypyrrole-aluminum pillared montmorillonite (PPy-Al-PMMT) clay composites were prepared by in-situ polymerization of pyrrole in aqueous dispersion of aluminum pillared montmorillonite (Al-PMMT) clay using FeCl 3 .6H 2 O as an oxidant. Various composite samples with varying amounts of (Al-PMMT) clay from 0.2 wt% to a…
Abstract We report first results on a new solar cell structure which incorporates n‐type ZnO nanowires, an undoped CdSe layer, obtained from quantum dot precursors, and a p‐type polymer layer as the main components. In the fabrication process the quantum dot layer is converted to a conformal ∼30 nm thick polycrystalli…
Several metals (Sn, Cu and Ag) were coated on the surface of carbon nanotubes (CNTs) by electroless plating to improve the wettability between CNTs and the Sn matrix. The coated CNTs were characterised by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The results reveal that the met…
Al2O3-coated FeCo nanocapsules were synthesized by the arc-discharge method and three-dimensional wire-like macro-aggregates were self-assembled simultaneously by nanocapsules. The electromagnetic (EM) parameters (i.e. the relative permeability and permittivity) were measured at 2–18 GHz. As a consequence of the surfa…
In this work, we examine the dependence of the fluorescence quantum yield of water-soluble CdSe/ZnS quantum dots on the local environment. The hydrophobicity of the local environment was modified by using different alkyl chain lengths in a set of oligo-ethylene glycols. Our results show that the quantum yield of CdSe/…
The photoinduced magnetism in thin films of the Prussian blue analogue A j Co k [Fe(CN) 6 ] l · n H 2 O deposited on Melinex solid supports is anisotropic, exhibiting a photoinduced increase when oriented parallel to the external magnetic field and a decrease when oriented perpendicular. The anisotropic behavior is ob…
We report the synthesis and biochemical evaluation of selective inhibitors of class II (zinc-dependent) fructose bisphosphate aldolases. The most active compound is a simplified analogue of fructose bisphosphate, bearing a well-positioned metal chelating group. It is a powerful and highly selective competitive inhibit…
We have discovered a rare example of a cationically charged inorganic material. The layered structure is an example outside the extensively studied isostructural set of anionic clays/layered double hydroxides and our previously reported lead fluoride nitrate. For the present compound, the antimony oxide hydroxide laye…
Abstract Poly(ethylene oxide) (PEO) based nanocomposites were prepared by the dispersion of multiwall carbon nanotubes (MWCNTs) in aqueous solution. MWCNTs were added up to 4 wt % of the PEO matrix. The dynamic viscoelastic behavior of the PEO/MWCNT nanocomposites was assessed with a strain‐controlled parallel‐plate r…
Abstract Untreated and alkali‐treated fibers from tamarind fruits were analyzed with Fourier transform infrared, chemical, X‐ray, and thermogravimetric methods. The morphology of the fibers before and after the alkali treatment was studied with scanning electron microscopy. The tensile properties of these fibers befor…
Glassy states of three pharmaceuticals, acetaminophen, griseofulvin, and nifedipine, and an acetaminophen-aspirin (1:1 mol) alloy were made by slow cooling of the melt and studied by calorimetry. Measurements were performed by cooling and heating at significantly slow rates of 20 K/h, which were comparable to the rate…
Scanning tunneling microscopy has been used to study the formation of a Bi monolayer deposited on the fivefold surface of $i{\text{-Al}}_{70}{\text{Pd}}_{21}{\text{Mn}}_{9}$. Upon deposition of low submonolayer coverages, the nucleation of pentagonal clusters of Bi adatoms of edge length $4.9\text{ }\text{\AA{}}$ is o…
Molecular simulations are used to shed light on an ongoing controversy over where gases adsorb on single walled carbon nanotube bundles. We have performed simulations using models of carbon nanotube bundles composed of tubes of all the same diameter (homogeneous) and tubes of different diameters (heterogeneous). Simul…
Different polymeric materials have been prepared from the organogels formed by a polymerizable methacrylic mixture (methyl methacrylate/ethylene glycol dimethacrylate, 1:1, w/w) and the macrocyclic pseudopeptide 1. The use of (2,4,6-trimethylbenzoyl)diphenylphosphine oxide as a very efficient radical initiator allows…