Materials Literature
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Halbschwergewichte: Chemisch vernetzte Dendrimernanocluster (DNCs) wurden als Plattform für die Herstellung von Kontrastmitteln für die Kernspintomographie entwickelt. Die sehr hohe Beladung mit Gadolinium führt dazu, dass der Tumor mit deutlich stärkerem Kontrast abgebildet wird (siehe Bild).
Surface-initiated vapor deposition polymerization (SI-VDP) is a very effective approach to synthesize grafted poly(amino acids). In this study, we developed an SI-VDP system with pressure and temperature control and demonstrated highly efficient surface-grafting of poly(gamma-benzyl-L-glutamate) (PBLG) on a silicon wa…
Thin ( to 65 nm) films of amorphous cobalt–phosphorus alloys are grown on by chemical vapor deposition from dicobaltoctacarbonyl and trimethylphosphine at 250, 300, and . Films incorporate C as an impurity, as both carbidic and graphitic C; Co and P, however, do not form phosphide compounds, as indicated by X-ray phot…
The distribution of carbon deposition on the cross section of a nickel/yittria-stablized zirconia (Ni/YSZ) anode after an accelerated degradation test in dry methane was analyzed using a scanning electron microscope equipped with an energy dispersive X-ray. The area near the anode top surface side was favored for carb…
The excited-state photodynamics of the neutral and one-electron-oxidized forms of five porphyrin dyads were studied in benzonitrile containing tetrabutylammonium hexafluorophosphate as the supporting electrolyte. Each dyad contains a zinc porphyrin (Zn) and a free base porphyrin (Fb) joined by a linear biphenylene (Ph…
A Suzuki reaction performed as a selective stepwise substitution of two boryl groups on a diarylporphyrin precursor is reported for straightforward construction of a porphyrin trimer, modeling photosynthetic donor-acceptor systems.
ABSTRACT A supercritical fluid extrusion (SCFX) process has been successfully developed for the production of a novel healthy snack containing 40–60 wt% protein with unique porous structure and texture. Supercritical carbon dioxide (SC-CO2) injection rate and product temperature at the die were found to be critical to…
Abstract The introduction of an ultrathin zinc oxide (ZnO) layer formed by the atomic layer deposition (ALD) technique was found to improve the operation parameters of nickel phthalocyanine (NiPc) based photovoltaic cells with a transparent bottom electrode, indium tin oxide (ITO). This improvement is attributed to se…
Ni–P alloy–multiwalled carbon nanotube (MWCNT) composite films were fabricated by an electrodeposition technique, and their microstructure, hardness, and frictional properties were analyzed. Ni–P alloy–MWCNT composite films containing 20–22 atom % P and 0.7–1.2 mass % MWCNTs were electrodeposited from a composite plat…
In this work, blue-emitting phosphors were synthesized by firing powder mixtures of , AlN, , and at for 2 h under 1.0 MPa . The resultant phosphors were characterized by phase identification, diffuse reflectance spectra, photoluminescence spectra, quantum efficiency, and temperature-dependent luminescence. The samples…
Ein Elektron mehr oder weniger: Um Radikalzentren in neutralen binären Zirconiumoxid-Clustern zu generieren, wird in kationischen oder anionischen Clustern mit einem Radikalzentrum ein Zr-Atom gegen ein Metallatom mit einem Elektron mehr (Nb) bzw. weniger (Sc) ausgetauscht. Diese isoelektronischen Systeme vermitteln ä…
We present a study of microphase separation induced by competitive hydrogen bonding in A-b-B/C diblock copolymer/homopolymer complexes where the diblock copolymer A-b-B is immiscible and the homopolymer C can interact unequally with both A and B blocks through hydrogen bonding. A model system containing poly(2-vinyl p…
We report a new type of molecular sensor using a Au nanowire (NW)-Au nanoparticles (NPs) conjugated system. The Au NW-NPs structure is fabricated by the self-assembly of biotinylated Au NPs on a biotinylated Au NW through avidin; this creates hot spots between NW and NPs that strongly enhance the Raman signal. The num…
A series of V-shaped, shape-persistent thiadiazole nematogens, based on an oligo(phenylene ethynylene) scaffold with ester groups connected via alkyloxy spacers, was efficiently prepared by a two-step procedure. Phase engineering results in an optimum of the mesophase range and low melting temperature when the nematog…
Shape memory alloys (SMAs) can be exploited successfully to reduce the complexity and the weight of actuators, but the main drawbacks that limit the use of SMAs are the low bandwidth, poor energetic efficiency, and unsatisfactory stroke. This article contributes to enhancing the mechanical, thermal, and electric perfo…
Abstract Sunflower oil‐based HBTPU/Ag and LTPU/Ag nanocomposites have been prepared by in situ catalytic reduction of a silver salt. The virgin polymer and their nanocomposites are soluble in various polar organic solvents and amenable for both solution‐casting and hot pressing. XRD, TEM, and UV spectroscopic analyses…
Shear stress, as temperature, induces particle motion, and affects the jamming transition from a fluid to a disordered solid state. Here, we show that at finite shear stress, the jamming transition is characterized by the presence of hysteresis, as in a given range of control parameters a flowing or a jammed state can…
Multilayered hydrogel coatings can be developed on the surface of glass slides via layer-by-layer deposition of hydrogen-bonded interpolymer complexes formed by poly(acrylic acid) and methylcellulose. Chemical modification of the glass surface with (3-aminopropyl)triethoxysilane with subsequent layer-by-layer depositi…
Nanoporous oxide coatings, such as anodic aluminum oxide (AAO), are utilized as drug-release platforms for up to weeks of delivery (see picture for doxorubicin, Dox). A burst-release phase is followed by sustained release, the kinetics of which is described by an activated surface-density-dependent desorption model.
The highly toxic oxyanion tellurite has to enter the cytoplasm of microbial cells in order to fully express its toxicity. Here we show that in the phototroph Rhodobacter capsulatus, tellurite exploits acetate permease (ActP) to get into the cytoplasm and that the levels of resistance and uptake are linked.