Materials Literature
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This chapter discusses various aspects of nanoparticulate systems in the context of drug delivery. Lipophilic drugs can be codissolved with the lipids during liposome preparation. Hydrophilic drugs can be passively entrapped into liposomes during liposome formation. The application of liposomes as a drug-delivery syst…
A commercially available urea-formaldehyde (UF) resin was blended with a hyperbranched polyether (HBP) obtained from glycerol being a by-product in biodiesel production. The mechanical properties of the cured polymeric blends are described in this article. It was found that low addition (3 wt%) of the modifier signifi…
The low-cost chemical bath deposition (CBD) technique is used to prepare CBD-ZnS films as antireflective (AR) coating for multicrystalline silicon solar cells. The uniformity of CBD-ZnS film on large area of textured multicrystalline silicon surface is the major challenge of CBD technique. In the present work, attempt…
The molecular dynamics of pyridine adsorbed onto dry high-surface-area silica gel was studied using solid-state deuterium NMR spectroscopy. Selectively and totally deuterated pyridine samples were used to identify the spectral signatures associated with each ring location and to identify the dynamical modes present in…
Abstract Novel bis‐4,9‐diazapyrenium dication has shown reversible pH dependent formation of 4,9‐ diazapyrenium pseudobase in water characteristic for most 4,9‐diazapyrenium derivatives. The compound has formed non‐covalent complexes with nucleotides in water, whose stability is controlled dominantly by aromatic stack…
Mn-doped indium-tin oxide (ITO) films were deposited on glass substrates using radio-frequency magnetron sputtering. The magnetization as a function of magnetic field showed hysteretic behavior at room temperature. According to the temperature dependence of the magnetization, the Curie temperature is higher than 400K.…
Using a combination of local and global magnetometry, dimensional analysis and numerical simulations we investigate the dynamics of magnetic phase cluster formation across the first-order magnetic-field-driven magnetostructural transition in Gd 5 Ge 4 at 6 K, where the transformation is completely irreversible, and at…
This work compares the dynamic mechanical behavior of piassava fiber–reinforced polyester composites with the behavior of the neat resin matrix. The results obtained confirm previous data showing that the interface of piassava/polyester composites is stronger than the usual interfaces found when untreated lignocellulo…
The catalytic mechanism of Bacillus subtilis guanine deaminase (bGD), a Zn metalloenzyme, has been investigated by a combination of quantum mechanical calculations using the multilayered ONIOM method and molecular dynamics simulations. In contrast to a previously proposed catalytic mechanism, which requires the bound…
An, aus und wieder an: Hochwertige CePO4:Tb3+-Nanodrähte, die auf einfache Weise und in hohen Ausbeuten bei Raumtemperatur erhalten wurden, zeigen eine Ce3+-sensibilisierte Terbium(III)-Lumineszenz (grün). Nach Oxidation von Ce3+ findet kein Energietransfer (ET) von Ce4+ zu Tb3+ statt, sodass die grüne Emission der Pr…
One strategy in creating functional nanostructures is templating where active nanoparticles are arranged on a regular nanoscale array of anchor sites on an inert substrate. An extraordinarily well ordered substrate with a 4.2 nm template periodicity is an alumina (aluminum oxide) film grown on a Ni3Al(111) metallic al…
We have investigated the electronic and magnetic properties of Co- and Fe-doped SnO2 by first-principles methods. The obtained results show that the ferromagnetic order is energetically much favored relative to the antiferromagnetic order in all the considered models of Co- and Fe-doped SnO2. The exchange interaction…
This work focuses on the synthesis of tetragonal zirconia (ZrO 2 ) nanocrystallites with diameters of 5 nm by a simple hydrothermal process in the presence of hydrazine hydrate. Structural characterization of the ZrO 2 products using X‐ray diffraction and Raman spectroscopy revealed that the predominant crystal phase…
(1− x )Pb(Mg 1/2 Nb 2/3 )O 3 − x PbTiO 3 (PMN–PT) ceramics of stoichiometric composition were fabricated by conventional pressureless sintering (CS) and spark plasma sintering (SPS). The CS ceramics exhibited a change from relaxor to normal ferroelectric behavior (FE) with increasing PT content. However, low dielectri…
The effects of the residual stress (either compressive or tensile) induced during the heat‐treatment process on the electrical properties of Pb(Zr 0.52 Ti 0.48 )O 3 (PZT) films were investigated. The PZT films were deposited on platinized silicon substrates by the rf‐magnetron sputtering method using a single oxide ta…
Simultaneous surface enhanced Raman scattering (SERS) and fluorescence is demonstrated from single conjugated polymer chains. As resonance enhancement of SERS depends on the spectral overlap of the polymer's absorption and the incident laser, resonance Raman and fluorescence effectively probe the absorbing and emittin…
Two new three-dimensional open frameworks, {[Cu 4 V 13 IV V 5 V O 42 (NO 3 )(C 3 H 10 N 2 ) 8 ]·10H 2 O} n ( 1 ) and {[Cu 4 V 12 IV V 6 V O 42 (SO 4 )(C 3 H 10 N 2 ) 8 ]·10H 2 O} n ( 2 ), have been hydrothermally synthesized. Structural analysis indicates that both complexes are isomorphic and are constructed from a c…
Kooperative Kristalle: In ferroelektrischen Cokristallen von Iodanilsäure (siehe Bild, orange) und 5,5′-Dimethyl-2,2′-bipyridin (grün) sind die Moleküle durch OH⋅⋅⋅N- und N+H⋅⋅⋅O−-Wasserstoffbrücken zu polaren Ketten verknüpft. Anlegen eines kleinen elektrischen Feldes E bewirkt einen kooperativen Protonentransfer übe…
The influence of the rigidity of polymer backbones on the side-chain crystallization and phase transition behavior was systematically investigated by a combination of differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), Fourier transform infrared spectroscopy (FTIR), and high-resolution solid-…
A novel method for producing full‐dense nano‐grained alumina was reported. The heat generated by the combustion reaction (or self‐propagating high‐temperature synthesis (SHS)) was applied to act as a heating source. An alumina compact was loaded inside the combustion reactants. After reaction, the temperature of the a…