Materials Literature
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Abstract This study is focused on wood flour‐reinforced biopolymers for injection molding. Eight commercial biopolymers were compounded with 30 and 50% wood flour and injection molded. Thermal processability via extrusion was evaluated by use of the resulting melt pressure, melt temperature, and machine load, during i…
Thin films of colloidal CdS and ZnS−CdS alloy quantum dots (QDs) were fabricated by layer-by-layer (LBL) self-assembly to synthesize blue luminescent QD thin films. The assembly of negatively charged colloidal QDs and positively charged poly(diallyldimethylammonium chloride) results in QD/polymer multilayers. The rela…
Abstract In Grammmengen gelingt die Enantiomerentrennung eines geringfügig – durch ein Fremdatom im Nanogerüst – chiralen Polyoxometallats (POM) durch Umsetzung mit kleinen Peptiden. Das funktionalisierbare Acylpolyoxowolframat (TBA) 6 [α 1 ‐P 2 W 17 O 61 {SnCH 2 CH 2 C(O)}] (siehe Bild) lässt sich durch kinetische R…
Bisphthalamic acids were prepared by reactions of phthalic anhydride and aromatic diamines. Novel flame-retardant poly(ester-amide) resins (FR-PEAs) were prepared by reactions of brominated epoxy resin (BER) with bisphthalamic acids using a base catalyst. The post reactions of these FR-PEAs were carried out with acryl…
Abstract Multi‐walled carbon nanotubes (MWCNTs)/polyethylene (PE) nanocomposites were prepared via in situ polymerization with MWCNTs supported Bis‐ (cyclopentadienyl) zirconium dichloride (Cp 2 ZrCl 2 ) catalyst. X‐ray photoelectron spectroscopy (XPS) and field emission scanning electron microscope (FESEM) results im…
We show that when bulk graphene breaks into $n$-type and $p$-type puddles, the in-plane resistivity becomes strongly field dependent in the presence of a perpendicular magnetic field even if homogeneous graphene has a field-independent resistivity. We calculate the longitudinal resistivity ${\ensuremath{\rho}}_{xx}$ a…
An active one-dimensional Fibonacci photonic quasi-crystal is realized via spin coating. Luminescence properties of an organic dye embedded in the quasi-crystal are studied experimentally and compared to theoretical simulations. The luminescence occurs via the pseudo-bandedge mode and follows the dispersion properties…
Conducting polymers, especially those template-synthesized on polymer acids, have attracted considerable attention for applications in organic and polymer electronics because of their processability and patternability, excellent mechanical properties, and robust electronic properties. The template synthesis of conduct…
Thermal degradation kinetics of solid-state D-sucrose and D-glucose were studied using differential thermal analysis (DTA) and thermogravimetric analysis (TGA) techniques. The melting and decomposition process of the two sugars were displayed as endothermic peaks on the DTA curve under nonisothermal conditions. It was…
In this paper, it has been found that a small biomolecule adenine can greatly affect the photoluminescence properties and stability of water-soluble CdTe quantum dots. The interaction between CdTe QDs and adenine is characterized by TEM, fluorescence microscope, and photoluminescence (PL), IR, and UV−vis spectra. The…
Comb-like fluorinated polystyrenes with different side chain interconnecting groups between backbone and side chain, such as ether (PST−O), thioether (PST−S) and sulfone (PST−SO 2 ), were synthesized in order to examine the effect of the interconnecting groups on the surface order and properties. Near edge X-ray absor…
Tungsten-doped titanium dioxide has the potential to replace conventional carbon black in catalyst support applications. In this paper, structural and electronic properties of W-doped rutile are theoretically studied. Lattice parameters as well as W−W pairing in models for a range of doping are calculated and match we…
Extended annealing in UHV causes the surface region of SrTiO3(001) to become enriched with TiO2, resulting in the formation of epitaxial islands of anatase TiO2(001). The islands are studied using UHV scanning electron microscopy (SEM), which reveals the changes in morphology during growth induced by misfit strain. St…
We refined crystal structures of newly found members of the Fe-1111 superconductor family, CaFe\_{1-x}Co\_{x}AsF and SrFe\_{1-x}Co\_{x}AsF (x = 0, 0.06, 0.12) by powder synchrotron X-ray diffraction analysis. The tetragonal to orthorhombic phase transitions were observed at ~120 K for unsubstituted CaFeAsF and at ~180…
Measurements of the sound velocities in a single crystal of MnSi were performed in the temperature range 4-150 K. Elastic constants, controlling propagation of longitudinal waves, reveal significant softening at a temperature of about 29.6 K and small discontinuities at ∼28.8 K, which corresponds to the magnetic phase…
Ordered hydration shells: The more ordered hydration shells outside the charged CNT surfaces prevent more compact adsorption of the peptide in the charged CNT systems [picture: see text], but peptide binding strengths on the charged CNT surfaces are stronger due to the electrostatic interaction.Studies of adsorption d…
Abstract This paper presents the results of peculiarity analysis in PL spectra of CdSe/ZnS QDs of different sizes. Commercially available CdSe/ZnS core/shell QDs characterized by emission at 525 nm (2.36 eV), 560 nm (2.22 eV), 605 nm (2.05 eV) and 640 nm (1.94 eV) have been studied. PL spectra were measured at excitat…
The dependence of ZnO surface structure on Pd/ZnO-catalyzed methanol decomposition was investigated by using model catalysts consisting of Pd films and particles on ZnO(101̅0) and ZnO(0001) single crystals. XPS studies showed that vapor-deposited Pd grows two dimensionally at 300 K and agglomerates into particles upon…
This paper reports the detailed studies on phase and morphology transformations and their effects on electrochemical properties of [Ni 4 Al(OH) 10 ]OH during charge−discharge cycles at high current densities. XRD measurements of the electrode at different stages of a charge−discharge cycle show that the material exist…
We have shown that efficient superbroadband near-IR luminescence can be realized in bismuth-doped high-silica nanocrystalline zeolites. The emission band covered the range of 930-1620 nm, with a maximum peak at 1146.3 nm, an FWHM of 152 nm, and a lifetime of over 300 mus under the excitation of a 488 nm laser line. Th…