Materials Literature
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Shape controlled synthesis of inorganic nanocrystals is one of the important issues in materials chemistry due to their novel shape dependent properties. Although various shapes of nanocrystals have been developed, a systematic account on the shape control of these nanocrystals still remains an important subject in ma…
The formation of clusters with crystal-like order in two dimensions is studied using Monte Carlo simulations. We find that the necessary conditions to induce the formation of clusters of one component is to add a second component that has a larger size and that has a long-range soft repulsive interaction with its own…
The influence of different factors on the overall mass transfer coefficient of liquid−liquid extraction was investigated, employing single-drop experiments with mass transfer in either direction. The chemical system of toluene−acetone−water was used with the advantage of high accuracy and repeatability when using gas…
Magnetoimpedance (MI) and hysteresis loops were studied in electroplated Ni79.1Fe20.9/Cu, Ni75.64Fe24.26Ru0.10/Cu, Ni79.51Fe20.31Ru0.18/Cu and Ni75.99Fe23.66Ru0.34/Cu wires. Scanning electron micrographs showed that crack-free electroplated wires were obtained with a smooth surface. The average grain size varied betwe…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Krishnan Chari, Charles M. Rankin, David M. Johnson, Thomas N. Blanton, Robert G. Capurso; Single…
This paper analyzes the observed phenomenology of the fluorescence time trace of collections of quantum dots (QDs) in terms of the model parameters that characterize the fluorescence blinking statistics of single QDs. We demonstrate that the non-universal dynamics that appear in fluorescence time traces of collections…
Implantation with low-energy (80 keV) oxygen ions and subsequent rapid thermal annealing at 800 °C are used to induce intermixing in a stack of 19 ZnO/Zn0.7Mg0.3O multiple quantum wells grown on sapphire by molecular beam epitaxy. Large blue shifts of more than 300 meV have been observed for doses up to 1 × 1016 cm-2,…
An unexpected feature common to 2H transition metal dichalcogenides ( 2H TMDs) is revealed with a first-principles Wannier function analysis of the electronic structure of the prototype 2H TaSe2: The low-energy Ta "5d(z2)" bands governing the physics of a charge-density wave (CDW) is dominated by hopping between next-…
GeO3S-Tetraeder und quadratisch-pyramidale VO5-Einheiten sind die primären Baueinheiten von zwei neuen Verbindungen, die das ungewöhnliche Anion [V14Ge8O42S8]12− enthalten (siehe Ausschnitt aus der Struktur; Ge schwarz, O rot, S gelb, V grau). Beide Verbindungen wurden unter Solvothermalbedingungen synthetisiert. Star…
In this paper, a method of improving the characteristics of complementary metal–oxide semiconductor (CMOS) on Si(111) wafers is presented. The combination of fluorine (F) implantation and long-time hydrogen annealing was applied to (111)CMOS devices for the first time. The interface state density in a (111)MOS device…
The cubic perovskite related material CaCu3Ti4O12 has attracted a great deal of attention due to the high values of the static dielectric constant, of order 104, approximately constant in the temperature range 100-600 K. The substitution of Ca by Cd results in a similar temperature dependence but a static dielectric c…
Charging and discharging currents have been measured in a diglycidyl ether of bisphenol-A epoxy resin with and without silica fillers, below and above its glass transition temperature T g = 65 °C. Both transient and steady-state current densities have been analysed. The average applied fields ranged from 3 to 35 kV mm…
alpha-Si(3)N(4) whiskers with novel saw-toothed and riblike structures have been synthesized in a high yield by a carbothermal reduction and nitridation route. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electr…
Auf amphiphilen Blockcopolymeren wurde ein CoIII-Salen-Komplex immobilisiert. Die Selbstorganisation dieser Co-Salen-Makromoleküle in Wasser führte zu Micellen mit einem {Co(salen)}-Kern und einer wasserlöslichen Hülle (siehe Bild). Die kinetische Racematspaltung aromatischer Epoxide in diesen Micellen gelang mit bis…
GeO3S tetrahedra and square-pyramidal VO5 units are primary building units of two new compounds containing the unusual anion [V14Ge8O42S8]12− (see section of the structure; Ge black, O red, S yellow, V gray). Both compounds were prepared under solvothermal conditions. Strong antiferromagnetic exchange interactions bet…
Isotactic polypropylene ( i -PP) films containing additives such as the commercial α -nucleation agent NA11 and the anorganic filler particles CaCO 3 and Al 2 O 3 were biaxially stretched. As a result, the films assume a cellular morphology with oblong cavities extending in the direction of the film elongation. In the…
Analysis of expressed sequence tags (ESTs) was performed to gain insights into cold adaptation in the polar diatom Fragilariopsis cylindrus Grunow. The EST library was generated from RNA isolated 5 days after F. cylindrus cells were shifted from approximately +5° C to −1.8°C. A total of 1376 ESTs were sequenced from a…
The pi-cell is studied as a function of its pretilt angle. It is shown experimentally and theoretically that the critical holding voltage decreases as the pretilt angle increases. At high pretilt angles, the critical holding voltage becomes zero and the bend cell becomes stable. The measured total response time of the…
Einblick in supramolekulare Objekte: Mit optischen Methoden und konfokaler Rastermikroskopie wurde der intermolekulare Energietransfer (ENT) in gemischten Vesikeln aus Donor/Acceptor-Oligo(p-phenylenvinylenen) (OPVs) in Wasser verfolgt (siehe Bild). Diese Beobachtung des Austauschprozesses zwischen getrennten Donor- u…
Recent phylogenetic studies of the diatoms indicate that members of the order Thalassiosirales occupy an interesting position in the diatom evolutionary tree. Despite their radial morphology and scaly auxospores, they are consistently recovered in molecular analyses as a member of subdivision Bacillariophytina and a s…