Materials Literature
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Qualität und Ausbeute hoch: Die vorgestellte Synthese liefert CdSe- und CdTe-Halbleiter-Nanokristalle, ohne dass ein Einspritzen der Vorstufen nötig ist. Sie ermöglicht zudem eine genaue Einstellung von Größe und Form der Nanokristalle, wie aus den synthetisierten tetraedrischen CdSe-Nanokristallen ersichtlich ist (TE…
The effect of fractal clusters on magnetic and transport properties of percolative superconductors is considered. The superconductor contains percolative superconducting cluster, carrying a transport current, as well as clusters of a normal phase, which act as pinning centers. A prototype of such a structure is a high…
The optical properties of two-dimensional electron gases in ZnSe/(Zn,Be)Se and ZnSe/(Zn,Be,Mg)Se modulation-doped quantum wells with electron densities up to 1.4x10^{12} cm^{-2} were studied by photoluminescence, photoluminescence excitation and reflectivity in a temperature range between 1.6 and 70 K and in external…
Growth of interfaces during vapor deposition is analyzed on a discrete lattice. It leads to finding distribution of local heights, measurable for any lattice model. Invariance in the change of this distribution in time is used to determine the finite size effects in various models The analysis is applied to the discre…
We have observed the pinned/biased moments in the superlattices consisting of ferromagnetic (FM) SrRuO3 (SRO) and antiferromagnetic (AFM) SrMnO3 (SMO)bilayer. The alternate stacking of SRO and SMO leading to a low field positive magnetoresistance with enhanced hysteretic field dependent magnetoresistance under the app…
It has been known for a long time that the low temperature behavior shown by the dielectric constant of quantum paraelectric $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ cannot be fitted properly by Barrett's formula using a single zero point energy or saturation temperature $({T}_{1})$. As it was originally shown [K. A.…
A theoretical many-body analysis is presented of the electron-electron inelastic lifetimes of Shockley electrons and holes at the (111) surface of Cu. For a description of the decay of Shockley states both below and above the Fermi level, single-particle wave functions have been obtained by solving the Schrödinger equ…
We investigate the role of discrete-particle noise in interface-controlled Ostwald ripening. We introduce the noise within the framework of the Becker-Doering equations, and employ both Monte Carlo simulations and direct numerical solution of these equations. We find that the noise drives the system towards a unique s…
We have performed thermal expansion and compressibility measurements on the recently discovered superconducting material NaxCoO2*4xD2O (x=1/3) using neutron powder diffraction over the temperature range 10-295 K and the pressure range 0-0.6 GPa. Pressure measurements were done in a helium-gas pressure cell. Both the t…
Nonadiabatic behavior of metastable systems modeled by anharmonic Hamiltonians is reproduced by the Fokker-Planck and imaginary time Schrodinger equation scheme with subsequent symplectic integration. Example solutions capture ergodicity breaking, reassure the H-theorem of global stability [M. Shiino, Phys. Rev. A, Vo…
A new process to form fibroin spongy porous 3-D structure is reported herein. The process involves freezing and thawing fibroin aqueous solution in the presence of a small amount of an organic solvent. The process requires no freeze-drying, chemical cross-linking, or the aid of other polymeric materials. The solvent c…
The reaction of hydrogen gas with magnesium metal, which is important for hydrogen storage purposes, is enhanced significantly by the addition of catalysts such as Nb and V and by using nanostructured powders. In situ neutron diffraction on MgNb(0.05) and MgV(0.05) powders give a detailed insight on the magnesium and…
In this paper we report on a systematic investigation, in the $5\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ temperature regime, of the electronic, magnetotransport, thermoelectric, thermal, and elastic properties of four ${M}_{2}\mathrm{Al}\mathrm{C}$ phases…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTUltrasound-Induced Site-Specific Cleavage of Azo-Functionalized Poly(ethylene glycol)Kimberly L. Berkowski, Stephanie L. Potisek, Charles R. Hickenboth, and Jeffrey S. MooreView Author Information The Department of Chemistry & The B…
Double agent: Controlled sulfonation of polystyrene hollow spheres gives hydrophilic layers with sulfonic acid groups that allow the formation of a wide variety of functional composites. In this way, double-shelled hollow spheres have been prepared in one step by using such sulfonated polystyrene hollow spheres as tem…
The differentiation of fibroblasts to contractile myofibroblasts, which is characterized by de novo expression of alpha-smooth muscle actin (alpha-SMA), is crucial for wound healing and a hallmark of tissue scarring and fibrosis. These processes often follow inflammatory events, particularly in soft tissues such as sk…
The sub-wavelength honeycomb-patterned films, which have optical transparency and superhydrophobicity, were fabricated by using condensed water droplets on the surface of a fluorinated polymer solution casting under humid conditions as the template.
We have studied the structural phase transition of multiferroic $\mathrm{Y}\mathrm{Mn}{\mathrm{O}}_{3}$ from first principles. Using group-theoretical analysis and first-principles density functional calculations of the total energy and phonons, we perform a systematic study of the energy surface around the prototypic…
With high quality and in high yield: The synthesis presented here affords CdSe and CdTe semiconductor nanocrystals without the need of a precursor injection. It allows the detailed control of the size and shape of the nanocrystals, as can be seen from the tetrahedral CdSe nanocrystals that have been prepared (TEM imag…
In the 1970s, high chromium (9–12%Cr) ferritic/martensitic steels became candidates for elevated temperature applications in the core of fast reactors. Steels developed for conventional power plants, such as Sandvik HT9, a nominally Fe–12Cr–1Mo–0·5W–0·5Ni–0·25V–0·2C steel (composition in wt-%), were considered in the…