Materials Literature
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Based on the analysis of the photocurrent behavior of Pt sandwiched Pb(Zr0.2Ti0.8)O3 (PZT) films, the experimental evidence of top Pt/PZT interface layer thickness effect on the photocurrent is reported. It was well established before that the photocurrent of metal/ferroelectric film is attributed to the height of Sch…
This work reports the targeting of the near infrared (NIR) dye indocyanine green (ICG) to the brain using composite nanoparticles. Thermal decomposition of iron pentacarbonyl was used to synthesize monodisperse oleic acid coated magnetic nanoparticles (OAMNP). Synthesized OAMNP and ICG were encapsulated in a poly (lac…
On the basis of the chemistry in solution, the solid-state structures and the corresponding electronic and optical properties of dipyrrolyldiketone boron complexes as π-conjugated acyclic anion receptors have been investigated. Solid-state assemblies of the receptors exhibit anion-dependent properties that are in shar…
We experimentally investigate the phase behavior of a dense two-dimensional system of interacting colloidal particles subjected to a decagonal quasiperiodic potential landscape created by the interference of five laser beams. Upon increasing the intensity I0 of the laser field, we observe the initial triangular crysta…
The aim of this work was to study the cytotoxicity of different fractions of gold nanoparticles prepared by ultrasonic spray pyrolysis from gold scrap. The target cells were rat thymocytes, as a type of nonproliferating cells, and L929 mouse fibroblasts, as a type of continuous proliferating cells. Fractions 1 and 2,…
We show a path for low-temperature crystallization of device-quality solution-processed lead zirconate titanate films. The essential aspect of the path is to circumvent pyrochlore formation at around 300 °C during temperature increase up to 400 °C. By maintaining enough carbon via pyrolysis at 210 °C, well below the t…
More Mn: New perovskite oxides (In1−yMny)MnO3 (1/9≤y≤1/3, see picture) were prepared by using a high-pressure technique. The A site is doped with Mn2+ ions, and (In1−yMny)MnO3 is similar to (Lu1−yCay)MnO3. The B-site-ordered structure is realized through the ordering of Mn3+ and Mn4+ ions. Materials with y≤0.25 demons…
This study presents an improved dynamic average model for brushless excitation system in synchronous generators. The model is based on an efficient voltage-behind-reactance model of the exciter and the average value modelling of rotating rectifier in all rectification modes. The excitation current is assumed to change…
The core/shell-type ZnO nanosphere/CdS nanorod and ZnO nanosphere/CdS nanoparticle composites have been selectively prepared through a simple ultrasound-assisted solution phase conversion process using monodispersed ZnO nanospheres as a starting reactant and in situ template. The formation mechanism of the products is…
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( K 0.5 Na 0.5 ) NbO 3 (KNN)-based ferroelectric thin films were prepared by a chemical solution approach modified with both diethanolamine (DEA) and ethylenediaminetetraacetic acid (EDTA) as the stabilizing agents. The obtained KNN thin films exhibited a remarkably low leakage current and well-saturated polarization…
In this study, thermal conductivity measurements of carbon nanotube (CNT) copper nanocomposite fabricated with a novel electrochemical co-deposition method were carried out. The measured thermal conductivity of a Cu-CNT nanocomposite is about 180% greater than that of pure copper. The resultant thermal conductivity of…
Vom Ring zum Rohr: Eine eindimensionale, n-halbleitende Nanoröhre entsteht durch Stapelung von Ringen, die durch bolaamphiphile Selbstorganisation von 1,4,5,8-Naphthalintetracarbonsäurediimid (NDI) mit L-Lysin-Kopfgruppen gebildet wurden (siehe Bild). Festkörper-NMR-Spektroskopie belegt die außergewöhnliche konformati…
AIM: Investigated the self-assembly and characterization of novel antifouling polyethylene glycol (PEG)-coated iron oxide nanoparticles as nanoprobes for magnetic resonance imaging (MRI) contrast agent. METHOD: Monodisperse oleic acid-coated superparamagnetic iron oxide cores are synthesized by thermal decomposition o…
We investigate the room temperature ferromagnetism in band gap tunable MgxZn1−xO (x≤0.22) alloy thin films and find that ferromagnetism is significantly enhanced in p-type MgxZn1−xO (x≥0.17) compared with the n-type counterparts (x≤0.15). Temperature-dependent photoluminescence measurements reveal the correlation betw…
Alternating-block hyperbranched polymers were synthesized using the highly versatile thiol-yne reaction. Dimethyl acrylamide-styrene and tert-butyl acrylate-styrene polymers were prepared, with subsequent hydrolysis of the tert-butyl ester to acrylic acid. The dimethyl acrylamide-styrene hyperbranched polymers self-as…
Licht ins Dunkel: Ein supramolekulares Hydrogel wird durch das mit α-Cyclodextrinen versehene Glucan Curdlan (CD-CUR) und Azobenzol-modifizierte Polyacrylsäure gebildet (pAC12Azo). Der Sol-Gel-Übergang und die Morphologie des supramolekularen Hydrogels können durch Licht der entsprechenden Wellenlänge geschaltet werde…
We report an investigation on strain-engineered adsorption of metal atoms on graphene and hydrogen storage capabilities of metal-decorated graphene by using first-principles approach based on density functional theory. We show that an applied strain not only stabilizes the supported metal atoms and prevents them from…
In piezoresponse force microscopy a lateral signal at the domain boundaries is occasionally observed. In recent years, a couple of experiments have been reported and varying explanations for the origin of this lateral signal have been proposed. Additionally, elaborated theoretical modeling for this particular issue ha…
We investigate the chemical composition and adhesion of chemical vapour deposited thin-film alumina on TiC using and extending a recently proposed nonequilibrium method of ab initio thermodynamics of deposition growth (AIT-DG) [Rohrer J and Hyldgaard P 2010 Phys. Rev. B 82 045415]. A previous study of this system [Roh…