Materials Literature
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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…
Polyamidoamine (PAMAM) dendrimers of different generations with various terminal groups were analyzed, for the first time, using a combination of high-performance liquid chromatography (HPLC), size exclusion chromatography (SEC), and matrix-assisted laser desorption/ionization-time-of-flight (MALDI-TOF) techniques. Se…
Forming an orderly line: Au nanoparticles can be aligned in one dimension by their incorporation into the helical structure of a natural polysaccharide, schizophyllan (s-SPG, see picture). The hydrophobic inner cavity of the helix hosts the hydrophobic nanoparticles and aligns the guests along its length (≈200 nm).
This work describes the immobilization of glucose oxidase (GOD) in mesostructured silica. The enzyme is incorporated into the silica framework via a direct one-step immobilization method. Results obtained by SAXS and nitrogen adsorption−desorption analysis clearly show that the channel arrangement of the recovered mat…
Unidirectional energy transfer is achieved in bilayers of CdTe nanocrystals of two different sizes produced by electrostatic assembly of oppositely charged particles without the need for an intermediate linker. Within these planar structures with reduced inter-layer distance, transfer rates up to (50 ps)−1 are demonst…
The optical properties of Ba2TiSi2O8 nanocrystals in transparent crystallized glasses were investigated. The transparent nanocrystallized glass with Ba2TiSi2O8 crystals having a particle size of ∼200nm was fabricated by crystallization (at 760 °C for 1 h) of a glass with the stoichiometric composition of Ba2TiSi2O8, i…
A dynamic coordinative-directed solubilization of single-walled carbon nanotubes (SWNTs) in aqueous solutions has been achieved through a combination of a Zn(II) metalloporphyrin complex and a cis-protected Pd(II) complex, which are believed to form charged acyclic and/or cyclic adducts on or around the side walls of…