Materials Literature
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Mechanisms of the hole trap and detrap on the oxygen-terminated diamond surfaces measured by diamond in-plane-gated field-effect transistors (FETs) have been investigated. Reproducible hysteresis characteristics are observed in the IDS-VGS characteristics of the diamond in-plane-gated FETs. They are caused by carrier…
The dominant oscillation shown in the laser-excited photoluminescence spectrum of the porous alumina film can be ascribed to the interference within a Fabry-Pérot optical cavity where the separation between two neighboring oscillations is highly sensitive to the film’s thickness and refractive index. The method, desig…
Microscale models of foam structure traditionally incorporate a balance between bubble pressures and surface tension forces associated with curvature of bubble films. In particular, models for flowing foam microrheology have assumed this balance is maintained under the action of some externally imposed motion. Recentl…
Solute microsegregation always takes place during dendritic crystal growth. Although this may be reduced with the increase of crystal growth velocity, the realization of segregationless dendritic growth is quite difficult. Here the authors present the results of remarkable solute trapping within the rapidly growing de…
Pr x Tb 1 − x Fe 1.9 (0⩽x⩽1) magnetostrictive alloys with cubic Laves phase have been synthesized by a high-pressure synthesis method. Crystal structure, magnetic properties, magnetocrystalline anisotropy, and the magnetostriction of PrxTb1−xFe1.9 (0⩽x⩽1) alloys are investigated. Composition anisotropy compensation is…
A series of cyclic hydrocarbons analogs where a carbon displays unusual planar tetracoordinate structure is proposed, employing hybrid density functional theory calculations using B3LYP functional and 6-311+G** basis set. Various strategies were employed to design the neutral planar tetracoordinate hydrocarbon analogs…
Regular arrays of freestanding Cu nanostructures were grown on patterned Si substrates using glancing angle deposition (GLAD) from two oppositely positioned sputtering sources. Continuous azimuthal substrate rotation during deposition leads to the formation of vertical 430-nm-wide rods, which broaden anisotropically d…
Sb-doped Zn1−xMgxO films were grown on c-plane sapphire substrates by radio-frequency magnetron sputtering. The p-type conduction of the films (0.05⩽x⩽0.13) was confirmed by Hall measurements, revealing a hole concentration of 1015–1016cm−3 and a mobility of 0.6–4.5cm2∕Vs. A p-n homojunction comprising an undoped ZnO…
The authors present an exact, analytic study of oscillatory modes guided by generalized asymmetric two-dimensional planar heterostructures with negative refractive index in either the core or the cladding. It is shown that, in sharp contrast to normal dielectric configurations, these waveguides always possess a freque…
Abstract Water‐soluble, stable, and easily synthesizable 1:4 complexes of rare‐earth ions with 8‐hydroxy‐5‐nitroquinolinate ligands have been prepared. These complexes can be sensitized by visible light with wavelengths up to 480 nm and show near‐infrared emission in aqueous solution. The incorporation of a nitro grou…
An effective field emitter has been developed by modifying an individual multiwalled carbon nanotube (MWCNT) tip with LaB6. The modified emitter possesses the merits of both the MWCNT and LaB6, which presents a significant low turn-on voltage, good emission properties, and long lifetime. As a result, a total current o…
Trägerlos: Nicht trägerfixiertes, nanoporöses Gold mit einer schwammartigen Morphologie (siehe Abbildung), das durch selektives Herauslösen des Silbers aus einer AgAu-Legierung hergestellt wurde, weist eine hohe katalytische Aktivität für die CO-Oxidation bei tiefen Temperaturen bis zu −20 °C auf und bietet interessan…
Abstract The effect of gamma irradiation has been probed by transmission measurements before and after γ‐irradiation on lead borate and bismuth borate glasses of varying composition by exposing with 60 Co radioisotope of absorbed dose 2.5 kGy. The induced absorption coefficient, effect of irradiation on optical band g…
The field of carbon nanotube-amphiphile self assembly has been reviewed to address the ongoing debate regarding their binding. Based on our spectrophotometry and transmission electron microscopy studies, this report shows the binding of lysophospholipids onto carbon nanotubes is dependent on the charge and geometry of…
Abstract Summary: Monte Carlo method was used to simulate the degradation of porous PLA scaffolds. The simulated volume was assumed to be divided homogeneously between the pore and solid PLA with the ratio equal to the bulk porosity of the scaffold. The volume was divided into surface and bulk elements where the surfa…
Abstract Aromatic carboxylates of the rare earths are known for highly efficient luminescence, thus holding the promise of applicability in optical devices, but may be problematic to apply as such due to their structure, which is polymeric in nature. Therefore, means of conversion into molecular species or eventually…
We investigate a family of molecular crystals containing noninteracting Ni10 magnetic molecules. We find slow relaxation of the magnetization below a temperature as high as 17 K and we show that this behavior is not associated with an anisotropy energy barrier. Ni10 has a characteristic magnetic energy spectrum struct…
Local vibrational modes of boron (B) in silicon nanowires (SiNWs) synthesized by laser ablation were observed at about 618 and 640cm−1 by Raman scattering measurements. Boron doping was performed during the growth of SiNWs. Fano [Phys. Rev. 124, 1866 (1961)] broadening was also observed in the Si optical phonon peak.…
Viel Wirbel: Ein Vergleich der Entwicklung von J-Aggregaten der Porphyrin-Titelverbindung in unbewegten und verwirbelten Lösungen ergab, dass das Vorzeichen der Chiralität von der Wirkung hydrodynamischer Gradienten (Scherströmungen) auf die Teilchenfaltung abhängt. Brownsche Bewegungen (unbewegte Lösung) ergeben irre…
Abstract Summary: The morphologies of diblock copolymers confined in a cylindrical tube have been investigated by the dissipative particle dynamics (DPD) method. Results indicate that the morphology depends on the volume ratio of the immiscible blocks, the diameter of the cylindrical tube and the interactions between…