Materials Literature
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Gold colloids with nanoparticles of different sizes were found to enhance the chemiluminescence (CL) of the luminol-H2O2 system, and the most intensive CL signals were obtained with 38-nm-diameter gold nanoparticles. UV-visible spectra, X-ray photoelectron spectra, and transmission electron microscopy studies were car…
Abstract Co‐continuous amorphous copolyester (PETG)/polyoxymethylene (POM) (50/50 wt%/wt%) blends were prepared using a twin screw extruder followed compression molding. Two types of thermoplastic polyurethane (TPU) (i.e., polyester‐based and polyether‐based) were used to compatibilize the blends system. The thermal p…
Thermally curable hybrid high refractive index polymer solutions have been developed. These solutions are stable up to 6 months under room temperature storage conditions and can be easily spin-coated onto a desired substrate. When cured at elevated temperature, the hybrid polymer coating decomposes to form a metal oxi…
Abstract Although many novel approaches for producing small‐caliber arterial grafts have been developed, problems with mechanical properties and blood compatibility have up to now prevented clinical implementation. Blending anticoagulant agents with natural biomaterials having excellent cell attachment and growth prop…
Abstract In this paper, a nonlinear peak‐fitting program is proposed based on the Bevington method, which would be helpful for the decomposition of relaxation peaks in the investigation of both internal friction and dielectric relaxation. Using this program, two severely overlapped relaxation peaks of internal frictio…
We present a monopole-dipole model to compute the polarization of metallic carbon nanotubes. The parameters of this model are adjusted on experimental data. In particular, we aimed at reproducing the mean polarizability of C60 and C70, the transverse polarizability of some carbon nanotubes, as well as the internal ove…
The ab initio phase diagram determines the energetic stability of the icosahedral TiZrNi quasicrystal. The complete ab initio zero-temperature ternary phase diagram is constructed from the calculated energies of the elemental, binary and ternary Ti-Zr-Ni phases. For this, the icosahedral $i$-TiZrNi quasicrystal is app…
Bionanopartikel wie der Augenbohnen-Mosaikvirus können Öltropfen in wässriger Lösung durch Selbstorganisation an der Flüssig-flüssig-Grenzfläche stabilisieren. Anschließende Vernetzung der Bionanopartikel liefert robuste Membranen mit kovalenten Verknüpfungen zwischen den Partikeln. Diese Membranen haben einen Durchme…
Abstract Surface‐modified CdS nanoparticles selectively dispersed in hexagonally packed poly(ethylene oxide) (PEO) cylinders of poly(styrene‐ b ‐ethylene oxide) (PSEO) block copolymers were prepared. The photoluminescence and ultraviolet–visible characteristics of the presynthesized CdS nanoparticles in N,N ‐dimethylf…
Two-dimensionally well-ordered, large-area arrays of epitaxial, ferroelectric, La-substituted Bi4Ti3O12 (BLT) nanostructures are prepared using gold nanotube membranes as a liftoff mask. Epitaxial nanostructures with a height of about 65nm and a lateral size of about 150nm, with either (001) (“c-axis”) orientation, or…
Abstract Polycrystalline samples of [Pb 0.92 (La 1– z Ga z ) 0.08 ][Zr 0.65 Ti 0.35 ] 0.98 O 3 (PLGZT) for z = 0.0, 0.3, 0.6, 0.9, and 1.0 were prepared by a solid‐state reaction technique. The single‐phase formation of the new compounds with tetragonal crystal structures was established by the room‐temperature X‐ray…
Dipole–dipole interactions in nanostructured materials deeply affect their magnetic properties, and detailed studies are still required to fully understand them. In this work, the dependence of magnetic properties on particle size has been evaluated in powder samples of Fe oxide nanoparticles produced by colloidal met…
Festhalten: Die Dynamik und nicht die Thermodynamik reversibler Verknüpfungen bestimmt vor allem die makroskopische Viskosität in einer Familie supramolekularer Netzwerke. Dies folgt aus einer Untersuchung, in der eine Reihe strukturell ähnlicher Pinzettenkomplexe (siehe Bild, OTf=CF3SO3−) mit unterschiedlicher Ligand…
The glass transition process gets affected in ultrathin films having thickness comparable to the size of the molecules. We observe systematic broadening of the glass transition temperature (T(g)) as the thickness of an ultrathin polymer film reduces below the radius of gyration but the change in the average T(g) was f…
Jamming, or dynamical arrest, is a transition at which many particles stop moving in a collective manner. In nature it is brought about by, for example, increasing the packing density, changing the interactions between particles, or otherwise restricting the local motion of the elements of the system. The onset of col…
A facile, parallel, and controllable approach to fabricating three-dimensional microscale structures with highly fluorescent quantum dots (QDs) over centimeter-sized surface regions is presented. Highly selective layer-by-layer assembly on a surface patterned by microcontact printing produces features of up to twenty…
A self-assembled hybrid of ultrananocrystalline diamond (UNCD) and carbon nanotubes (CNTs) is successfully prepared by their simultaneous growth in an argon-rich Ar/CH4 plasma (see Figure and cover). Control of the relative fractions and configurations of UNCD and CNTs in the hybrid material is demonstrated. This new…
We report on direct measurements of the impurity band hole polarization in the diluted magnetic semiconductor (Ga,Mn)As. The polarization of impurity band holes in a magnetic field is strongly enhanced by antiferromagnetic exchange interaction with Mn ions. The temperature dependence of the hole polarization shows a s…
Ist da noch ein Platz frei? Für die Bildung von Methanol aus CO und H2 an ZnO-Oberflächen wird auf der Grundlage von Rechnungen und Experimenten ein Mechanismus vorgeschlagen, bei dem CO an Sauerstoff-Fehlstellen des Heterogenkatalysators adsorbiert (siehe Bild; C rot, H weiß, O grau, Zn schwarz). Beigemischtes CO2 bl…
We demonstrate complete reversal of a full magnetic hysteresis loop of the magnetic semiconductor (Ga,Mn)As by ultrashort optical excitation with a single subpicosecond light pulse, with obvious implications for ultrafast magneto-optical recording. Our approach utilizes the fourfold magnetic anisotropy of (Ga,Mn)As, i…