Materials Literature
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Novel PS composites with improved combustion properties were prepared by using OctaTMA-POSS and OctaTMA-POSS-based lamellar hybrids. The lamellar hybrids were prepared via template-directed synthesis from OctaTMA-POSS and surfactants. The microstructures of composites were characterized by TEM, which showed that POSS-…
The La0.65Sr0.35MnO3 (LSM)/SrTi0.2Fe0.8O3 (STF) multilayer is observed using scanning probe microscopy following a focused-ion beam milling process with shallow incidence angle. Although the nominal thickness of each layer is about 5 nm, the exposed layers are magnified by several orders of magnitude on the surface af…
The physicomechanical properties of new polyurethanes (PUs) derived from toluene diisocyanate, poly(propylene glycol), and cured by third‐generation hyperbranched polyester polyol (HB3), trimethylolpropane (TMP), or glycerol and their nanocomposites have been investigated. An apparent microphase‐segregated morphology…
This investigation systematically studies the lattice dynamics and crystalline properties in Zn 1– x Mg x O using high-pressure Raman spectroscopy. The incorporation of Mg and the application of external pressure cause distinct phonon vibrational behaviors in ZnO. Accordingly, the 202.7, 332.7, and 511.5 cm –1 phonons…
Abstract Novel materials and methods of synthesis in the field of energy conversion and economy are reported. The main goal is to prepare and characterize Li (4 − x ) Mn (5 − 2 x ) Fe 3 x O 12 compounds. These compounds crystallize in a spinel‐type structure, AB 2 O 4 , in which the cationic location in the A and B su…
We synthesized new amphiphiles comprised of a single diacetylenic chain and an oligoethylenoxide polar chain linked by an amide bond. In aqueous medium, they are not soluble at room temperature but form weak gels. Electron microscopy studies have shown that they self-assemble into helical tapes or nanotubes with lengt…
In the companion paper [T. S. Ingebrigtsen, S. Toxvaerd, O. J. Heilmann, T. B. Schrøder, and J. C. Dyre, "NVU dynamics. I. Geodesic motion on the constant-potential-energy hypersurface," J. Chem. Phys. (in press)] an algorithm was developed for tracing out a geodesic curve on the constant-potential-energy hypersurface…
Using ab initio density-functional theory, we study the role of interstitial hydrogen on the energetics of the phase transformation of iron from bcc to hcp along Bain's pathway. The impurity creates an internal stress field that can be released through a tetragonal distortion of the lattice, promoting the bcc (ferroma…
We have developed a white organic light-emitting diode featuring a double emission layer comprising a blue light-emitting conductive polymer as a host material for Cadmium Selenide (CdSe) quantum dots as red light emitters and tris-(8-hydroxyquinoline) aluminium thin layer for green light emission. The Commission Inte…
We study the electronic properties of two-dimensional electron gas (2DEG) with quadratic dispersion and with relativistic dispersion as in graphene in the inhomogeneous magnetic field consisting of the Aharonov-Bohm flux and a constant background field. The total and local density of states (LDOS) are obtained on the…
Polyacrylonitrile (PAN)/clay nanocomposites were synthesized with different concentrations of clay by an emulsifier-free emulsion polymerization technique. PAN/clay nanocomposites were characterized by X-ray diffraction (XRD) study, Transmission Electron Microscopy (TEM) analysis, Fourier Transform Infrared (FTIR) and…
Theoretical first-principles studies of the effect of oxidation on the atomic and electronic structure of a Pd 4 cluster and the nature of cluster support interactions have been carried out by investigating a Pd 4 cluster deposited on a rutile TiO 2 (110) surface. Our studies based on a gradient-corrected density func…
The growth of epitaxial ultrathin BaTiO(3) films on a Pt(100) substrate has been studied by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and x-ray photoelectron spectroscopy (XPS). The films have been prepared by radio-frequency-assisted magnetron sputter deposition at room temperature…
In this paper, we report on a new method of synthesis for ZnO nanowires on arbitrary substrates and nanowalls on aluminum coated substrates at ambient conditions. Our method is based on sonochemical reaction of Zinc acetate dihydrate (Zn(O2CCH3)2-2H2O) Zinc nitrate hexahydrate (Zn(NO3)2-6H2O) and hexamethylenetetramin…
Using fast lattice Monte Carlo (FLMC) simulations both in a canonical ensemble and with Wang-Landau–transition-matrix sampling, we have studied a model system of homopolymer brushes in an implicit, good solvent. Direct comparisons of the simulation results with those from the corresponding lattice self-consistent fiel…
3D-nanostructured ensembles of silicon nanocrystals forming inverse opals, directly prepared by magnesioreduction, exhibited intense photoluminescence in a broadband range (visible and NIR). Light emission, which strongly diminished under photoexcitation, was preserved by engineering the nanocrystals interface with at…
UV-curable coating of unsaturated polyester/epoxy resin (UP-ER) modified with methylacryloylpropyl polyhedral oligomeric silsesquioxanes (MAP-POSS) was prepared. The UV-cured process, kinetics, and some properties of coating were investigated. The results show that this coating has a better UV-curing property. The cur…
The measurements of neutron diffraction patterns of commercially product and 10 hour mechanically milled cathode material lithium cobaltites (LiCoO 2 ) have been performed. Rietveld analysis using FullProf does not show the change of crystal structure due to milling process, but the diffraction pattern has a lower int…
Thermoelectric materials have received renewed interest in the current search for renewable energy. The Harman method is commonly used to determine thermoelectric properties of materials, but due to parasitic heat losses the accuracy of this method is poor at elevated temperatures. Here, we present a simple and effect…
Zelle in der Zelle: Die Bildung von Membranen an Grenzflächen durch Kationenaustausch von Polyoxometallaten ergibt modulare anorganische chemische Zellen mit einstellbaren Morphologien, Eigenschaften und Zusammensetzungen (siehe Bild). Diese anorganischen chemischen Zellen (iCHELLs) sind redoxaktiv, können chiral sein…