Materials Literature
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Fein säuberlich aufgereiht zu einer Kette werden Au-Nanopartikel, die in der helicalen Struktur des natürlichen Polysaccharids Schizophyllan (s-SPG, siehe Bild) eingeschlossen sind. Das hydrophobe Innere der Helix nimmt die hydrophoben Nanopartikel über die gesamte Länge von ca. 200 nm auf.
We studied the dynamics of dissolved water in aluminosilicate glasses with the compositions ${\mathrm{NaAlSi}}_{3}{\mathrm{O}}_{8}\ifmmode\cdot\else\textperiodcentered\fi{}0.3{\mathrm{H}}_{2}\mathrm{O}$, ${\mathrm{NaAlSi}}_{3}{\mathrm{O}}_{8}\ifmmode\cdot\else\textperiodcentered\fi{}1.3{\mathrm{H}}_{2}\mathrm{O}$ and…
The World Health Organization (WHO) rules (1996) recommend in chapter 3 “Technical data for regulatory assessment” that information for marketing authorization should contain among others in-documentation, equivalence data (comparative bioavailability, pharmacodynamic or clinical studies), and comparative in vitro dis…
The morphology of silver crystals grown at the liquid−liquid interface between silver nitrate and ascorbic acid solutions was investigated in the presence of various organic molecules. The addition of ethylenediamine tetraacetate changed the morphology from dendrites and plates into single-crystalline wires with a wid…
The surface effect on the electrical and optical properties of tetragonal barium titanate at room temperature is investigated theoretically by using a microscopic model based on the orbital approximation in correlation with the dipole--dipole interaction. Both the first-, second-, and third-order electronic polarizabi…
Structural speciation of glasses in the systems PbO−B 2 O 3 −SiO 2, PbO−B 2 O 3 −Al 2 O 3 −SiO 2, and PbO−Al 2 O 3 −SiO 2 were studied using solid state 29 Si, 27 Al, 11 B, and 207 Pb nuclear magnetic resonance (NMR) and Raman spectroscopy. Application of these methods provided insight into the role of Al 2 O 3 incorp…
Peculiar low-temperature electronic properties induced by the filling change from a half-filled band realized in $\ensuremath{\kappa}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{4}{\mathrm{Hg}}_{2.89}{\mathrm{Br}}_{8}$ and $\ensuremath{\kappa}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensur…
The electronic structures of several possible nitrogen-related centers on the diamond surface and in the diamond grain-boundary have been studied using density functional theory approaches with cluster models. The results indicate that the nitrogen-vacancy related complex may be the shallow donor center, and the compl…
Derivatives of (nitro)cobalt picket fence porphyrin with oxygen-donating ligands have been prepared in solution and in the solid state. Crystal structures of two of these derivatives, (H2O)CoTpivPP(NO2) and (CH3OH)CoTpivPP(NO2), have been determined. The ethanol complex (C2H5OH)Co(TPP)(NO2) has been obtained and spect…
Loading and release behaviors of compressed polyelectrolyte multilayers composed of poly(styrenesulfonate sodium salt) and poly(diallyldimethylammonium chloride) were investigated using fluorescein and rhodamine 6G as indicators by confocal laser scanning microcopy, fluorescence spectroscopy, and UV-vis spectroscopy.…
Poly(4‘-fluoro-2,5-benzophenone) was synthesized by Ni(0) catalytic coupling and was reacted with various nucleophiles by aromatic substitution (S N Ar) to produce substituted poly( p -phenylene) thermoplastics. Substitution by the nucleophiles was determined in most cases to be nearly quantitative by gel permeation c…
Graphitische Kohlenstoffnanoröhren aus Graphenschichten, die senkrecht zur Röhrenachse orientiert sind (siehe Bild; der Pfeil zeigt die Achse an), wurden durch schrittweise Verkokung vororganisierter scheibenförmiger Moleküle in einem porösen Aluminiumoxidtemplat erhalten. Die Ausrichtung der Schichten sowie Größe, Wa…
In this study, we rely on low-angle annular dark-field scanning transmission electron microscopy to probe the interface strain profile in epitaxial PbTiO3∕SrTiO3 thin-films. All samples displayed a compressively strained layer at the PbTiO3∕SrTiO3 interface, with the strain vector parallel to the polarization directio…
Thermal and microwave reactions between [PcSn(IV)Cl2] (1) and the potassium salts of eight fatty acids (2 a-h) led to cis-[(RCO2)2Sn(IV)Pc] compounds (3 a-h) in yields ranging from 54 to 90 %. Compounds 3 a-h were fully characterized by elemental analysis, spectroscopy (IR, UV/Vis, multinuclear NMR), and seven X-ray d…
The composite nanoparticles of Au-core capped by CdS shells of different thickness were prepared and assembled into densely packed 3-dimensional films by the layer-by-layer self-assembly (LBL) technique. These films exhibited the 3-dimensional structure of densely packed Au@CdS composite nanoparticles and the shell th…
We have investigated the manganese diffusion depth and the tunneling magnetoresistance (TMR) properties in ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$/GaAs/AlAs/GaAs/${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ tunnel junctions. Auger electron spectroscopy and transmission electron…
Two one-dimensional (1D) azido-bridged coordination polymers of formula [Cu(L 1 )(μ-1,1-N 3 )(N 3 )] n ( 1 ) and [Cu(L 2 )(μ-1,1-N 3 )(N 3 )] n ( 2 ) have been synthesized and structurally characterized, and their magnetic properties have been studied, where L 1 and L 2 are the bidentate Schiff bases obtained from the…
In an effort to achieve high performance and low cost manufacturing of composite structures, this study focuses on the resin film infusion (RFI) process and the three-dimensional (3-D) textile preform, which consists of in-plane and out-of-plane fibers for the near net-shape. Bismaleimide resin system is selected for…
Extradick und wohlsortiert: Mithilfe eines neuen Verfahrens werden beim Anodisieren von Titan bis zu 2.5 μm dicke, hoch geordnete Oberflächenschichten aus einseitig offenen TiO2-Nanoröhren erhalten (siehe Bild). Parameter wie die Polarisationsvorschubgeschwindigkeit und die Elektrolytkonzentration sind entscheidend fü…
Sol-gel-driven ZnGa2O4:Mn2+ phosphors are annealed at various temperatures. As an increase of the annealing temperature of as-grown ZnGa2O4:Mn2+ phosphors, their lattice constants and crystallinities are increased. The resonance signal intensity of Mn2+ ions on Td sites is drastically increased whereas that of Mn2+ io…