Materials Literature
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A novel method was developed to produce a porous polymer film with size-tunable pores on its surface. The porous film was produced using polystyrene microspheres as a template and the surface pore size can be tuned without changing the size of the template microsphere. Polystyrene microspheres were self-assembled on a…
Quantum dots (QDs) have been used extensively as fluorescent markers in several studies on living cells. Here, we report the synthesis of conjugates based on glutathione (GSH) and QDs (GSH-QDs) and we prove how these functionalized fluorescent probes can be used for staining a freshwater invertebrate called Hydra vulg…
Microbial amidases belong to the thiol nitrilases family and have potential biotechnological applications in chemical and pharmaceutical industries as well as in bioremediation. The amidase from Pseudomonas aeruginosa isa6 x 38-kDa enzyme that catalyzes the hydrolysis of a small range of short aliphatic amides. The he…
Abstract A novel acrylamide/maleic acid copolymer [P(AM‐MA)] hydrogel nanofibrous membrane with a fiber diameter of ca. 120 nm is prepared by electrospinning an aqueous P(AM‐MA) solution with diethylene glycol as crosslinker, followed by a heat‐induced esterification crosslinking reaction at 145 °C. This hydrogel nano…
A series of tetrathiafulvalene acetylene derivatives, [TTF-Ctriple bondC-A] [A=C6H4N(CH3)2-4 (1), C6H4OCH3-4 (2), C6H5 (3), C6H4F-4 (4), C6H4NO2-4 (5), C5H4N-2 (6), C5H4N-3 (7), and C5H4N-4 (8)], have been designed and synthesized to provide insight into the nature of the donor-acceptor interaction via a pi-conjugated…
The electron-phonon coupling in two-dimensional graphite and metallic single-wall carbon nanotubes is analyzed. The highest-frequency phonon mode at the $K$ point in two-dimensional graphite opens a dynamical band gap that induces a Kohn anomaly. Similar effects take place in metallic single-wall carbon nanotubes that…
We present here the spontaneous formation of nanoporous sheets in aqueous solution without a template to guide them, which is based on the self-assembly of dumbbell-shaped rod amphiphiles driven by a fine balance of anisotropic hydrophobic interactions, and steric constraints endowed with bulky dendritic wedges. These…
Morphology of polystyrene (PS)/poly(methyl methacrylate) (PMMA)/toluene droplets, in which phase separation proceeds, dispersed in SDS aqueous solution was examined. It changed from ex-centered PS-core/PMMA-shell to hemisphere with increasing SDS concentration. At low polymer weight fraction (wp), PS and PMMA phases c…
Complexes of the 4-(2'-pyridyl)-1,2,3,5-dithiadiazolyl radical bidentate ligand with bis(hexafluoroacetylacetonato)manganese(II) and with bis(hexafluoroacetylacetonato)copper(II) have been prepared. Unlike the previously reported cobalt(II) complex, these complexes form dimers via intermolecular S...S contacts in the…
Electronic and magnetic properties of BiCoO(3) have been investigated using the ab initio density-functional calculations with local spin density approximation (LSDA) and LSDA+U methods. The structural stability and the origin of the multiferroism for ferroelectronic and ferromagnetic existence were addressed. It was…
The further, the better! Photoinduced charge separation between a semiconducting nanosheet donor and the acceptor methylviologen (MV2+) is greatly stabilized in the presence of hectorite clay nanosheets. The distance between the donor and acceptor, which results from the formation of hectorite microdomains that select…
AC-impedance spectroscopic studies in the temperature range 550–700 °C are carried out on undoped and Mn doped PZN-PT single crystals grown by the flux method. The variation of dielectric permittivity with temperature at different frequencies shows normal ferroelectric and relaxor-like dependence for the doped and und…
Nachgeahmt: Ein supramolekulares Hydrogel als Strukturkomponente künstlicher Enzyme eröffnet einen Zugang zu biomimetischen Katalysatoren. In Toluol erreicht Häminchlorid, das in ein solches Hydrogel eingeschlossen ist, etwa 60 % der katalytischen Anfangsaktivität von Meerrettichperoxidase. Zudem ist seine Aktivität i…
Despite the industrial importance of the process, the detailed chemistry of the high-temperature oxidation of titanium tetrachloride (TiCl4) to produce titania (TiO2) nanoparticles remains unknown, partly due to a lack of thermochemical data. This work presents the thermochemistry of many of the intermediates in the e…
Abstract 1‐Carboxy‐ N , N ‐dimethyl‐ N ‐(2′‐methacryloyloxyethyl)methanaminium inner salt (CMB) was polymerized by ATRP initiated with a disulfide difunctionalized by 2‐bromoisobutyryl groups. The disulfide‐carrying carboxybetaine polymer (DT‐PCMB) was used for the preparation of PCMB‐protected gold nanoparticles (PCM…
Extracellular matrixes such as bone, skin, cornea, and tendon have ordered structures comprised for the most part of collagen, an elongated protein of well-defined dimensions and composition. Here we show how the cooperative ordering of collagen triple helices in the dense fluid state is exploited to produce dense ord…
Insulated wires: Light harvesting was demonstrated from a macrocyclic “tube” to covalently bound π-conjugated polymers encapsulated within (see picture). The multichromophoric polymer core allows accumulation of excitation energy. The high intramolecular mobility of these excitations leads to a dependence of the emiss…
Thin films were produced by the reactive thermal evaporation of pure silver oxide (AgO) in a background of molecular oxygen. The effects of the deposition rate and oxygen partial pressure on the structural, chemical, electrical and optical properties of the films were investigated. The films were characterized using x…
Pi-conjugated polymers and oligomers show charge transfer (CT) absorption bands when mixed with electron acceptors in chloroform solution. This is attributed to the formation of (ground state) donor-acceptor complexes in solution. By varying the concentration of the donor and acceptor, the extinction coefficient for t…
Bringt Farbe rein: Selbstorganisation eines amphiphilen, stark verzweigten Poly(amidoamins) auf einem festen Substrat liefert Filme mit Honigwabenmuster. Über die Konzentration der Polymerlösung lässt sich die Filmdicke im Bereich von Nano- bis Mikrometern einstellen. In unterschiedlichen Farben lumineszierende Filme…