Materials Literature
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The rate and temperature dependent shear deformation behaviour of biomedical titanium alloy (Ti–15Mo–5Zr–3Al) is investigated using a torsional split Hopkinson pressure bar at strain rates ranging from 1·2 × 10 3 to 2·8 × 10 3 s –1 and temperatures of –150, 25 and 300°C. It is found that both the strain rate and the t…
A thin-film of dielectric on a reflecting surface constituting a multilayer substrate modulates light intensity due to the interference effect. A nanostructure consisting of randomly oriented silver particles of different shapes, sizes, and interparticle spacings supports multiple plasmon resonances and is observed to…
Aqueous chemical coprecipitation methods have been developed to produce large quantities, 12 g per batch, of pure‐phase Ba 2 Co 2 Fe 12 O 22 Y‐type hexaferrite powders. X‐ray diffraction studies showed that sintering temperatures as low as 900°C were sufficient to produce a single‐phase Y‐type hexaferrite material. Th…
We report on magneto-transport measurement in disordered graphene under a pulsed magnetic field of up to 57 T. For large electron or hole doping, the system displays the expected anomalous integer quantum Hall effect (IQHE) specific to graphene down to the filling factor ν=2. In the close vicinity of the charge neutra…
Ceramic foams are being used in numerous industrial applications such as high‐temperature thermal insulation, hot gas particulate filters, molten metal filters, catalyst support, and cores in high‐ temperature structural panels. The growing usage ceramic foams stems from the favorable properties such as low density, l…
Si-rich erbium silicate (SRES) films were deposited on p-type Si substrates by the magnetron sputtering technique and then annealed at 850 and 1000 °C in N 2 . Rutherford backscattering spectroscopy and Raman spectroscopy indicate that erbium silicates and Si excess, both in the amorphous phase, coexist in the SRES fi…
Real-time evolution of nanoparticles grown at the semiconductor/electrolyte interface formed between a single crystalline n-type GaAs wafer and an aqueous solution of AgNO(3) has been studied by using high-energy synchrotron X-ray diffraction. The results reveal the distinct nucleation and growth steps involved in the…
Abstract Y 2 O 3 :Eu and Y 2 O 3 :Eu,Zn nano powders were prepared by both conventional combustion and microwave assistance combustion (MAC) methods. The nanopowders obtained here were investigated by means of X‐ray diffractometry (XRD), Photoluminescence spectroscopy (PL) and scanning electron microscopy (SEM). The c…
Thermoelectric performance peaks up for intermediate Mg(2)(Si(1-x)Sn(x)) alloys, but not for isomorphic and isoelectronic Mg(2)(Si(1-x)Ge(x)) alloys. A comparative study of the equation of state parameters is performed using density functional theory, Green's function technique, and the coherent potential approximatio…
We extend our previous application of the convergent close-coupling (CCC) and time-dependent close-coupling (TDCC) methods [Phys. Rev. A 81, 023418 (2010)] to describe energy and angular resolved double photoionization (DPI) of lithium at arbitrary energy sharing. By doing so, we are able to evaluate the recoil ion mo…
In nanodispersed semiconductors, no signifi cant space charge layer can be established within particles whose dimensions are inferior to the Debye length. Rather than relying on an electric fi eld, sustained light-induced charge separation in bulk heterojunction photovoltaic devices is based on the kinetic competition…
Perlenketten aus farbigen Zeolithkristallen: Die Kanaleingänge mit Farbstoff beladener roter und grüner Zeolith-L-Kristalle wurden ortsspezifisch entweder mit Alkoxyaminen oder mit Nitroxiden modifiziert. Eine milde radikalische Austauschreaktion alkoxyaminmodifizierter „grüner“ Zeolithe mit nitroxidmodifizierten „rot…
UV laser irradiation of PMMA films containing Cd thiolate precursors results in the spatially selective formation of CdS crystalline nanoparticles in the host matrix. Here we investigate the effect of the irradiation wavelength on the quality of the formed nanocrystals. Fluorescence topography and XPS studies reveal t…
A physically-based, rate and length-scale dependent strain gradient crystal plasticity framework was employed to simulate the polycrystalline plastic deformation at the microscopic level in a large-grained, commercially pure Ni sample. The latter was characterised in terms of the grain morphology and orientation (in t…
Effects of solvents on segmental dynamics of polystyrene (PS) at the chain end have been studied by the site-specific spin-label method of electron spin resonance (ESR). PS’s having similar number-average molecular weight (ca. 25 kDa) but labeled with a nitroxde at the chain end (E-PS) or midchain segments (M-PS) indi…
By Fourier transform infrared and optical spectroscopy, it has been observed that interactions of dimethyl sulfide and tetrahydrothiophene with nitrosyl and nitro complexes of meso-tetra-p-tolylporphyrinatocobalt [Co(TTP)] lead to the formation of previously unknown six-coordinate species. Nitrosyl complexes of the ge…
A solution precursor plasma spray (SPPS) technique has been used for direct deposition of cerium oxide nanoparticles (CNPs) from various cerium salt solutions as precursors. Solution precursors were injected into the hot zone of a plasma plume to deposit CNP coatings. A numerical study of the droplet injection model h…
The energetic and electronic structures of V-doped anatase TiO(2) have been investigated systematically by the GGA+U approach, including replacement of Ti by V in the absence and presence of oxygen vacancies and the presence of an interstitial site. It was found that V should exist as a V(4+) ion in the replacement of…
The development of core-shell nanoparticles has shown a wide range of new applications in the fields of chemistry, bioscience, and materials science because of their improved physical and chemical properties over their single-component counterparts. In the present work, we took the core-shell nanoarchitectures as an e…
Abstract C3‐vinyl and C13‐keto‐carbonyl groups of methyl pyropheophorbide‐ a , a chlorophyll‐ a derivative, were systematically modified to investigate the substituent effects along the y ‐axis of chlorin macrocycles. C13 1 deoxygenation resulted in blueshifts of the Q y absorption maxima and a large reduction of thei…