Materials Literature
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Wiring systems powered by highly efficient superconductors have long been a dream of scientists, but researchers have faced practical challenges such as finding flexible materials. Here we report superconductivity in Nb2PdxS5-δ fibers with transition temperature up to 7.43 K, which have typical diameters of 0.3-3 μm.…
Due to high incidence of vascular bypass procedures, an unmet need for suitable vessel replacements exists, especially for small-diameter (<6 mm) vascular grafts. Here, we developed a novel, bilayered, synthetic vascular graft of 1-mm diameter that consisted of a microfibrous luminal layer and a nanofibrous outer laye…
The great potential of magnetic field enriched surface enhanced resonance Raman spectroscopy (SERRS) for early malaria diagnosis has been demonstrated previously. This technique is able to detect β-hematin, which is equivalent to a malaria biomarker (hemozoin) in Raman features, at a concentration of 5 nM. In this stu…
Submicrometer, porous polymeric vesicles, composed of an amphiphilic di-block copolymer, polystyrene-b-polyisocyanoalanine (2-thiophene-3-yl-ethyl) amide, are used to encapsulate an enzyme, alkaline phosphatase, and a fluorescent reporter polymer poly 1(3((4methylthiophen-3-yl)oxy) propyl) quinuclidin-1-ium. Passive d…
We present a real-space imaging study of homogeneous and heterogeneous crystal nucleation and growth in colloidal suspensions of slightly charged and polydisperse particles. Heterogeneous crystallization is observed close to curved surfaces with radii of curvature, R, in the range from 4 to 40 particle diameters, d. C…
Microcosm experiments were conducted along the Washington and Oregon coasts in May 2009, May 2010, and July 2010 to determine whether variation in the supply of silicic acid from the Columbia River could influence the silicification and sinking potential of coastal diatom blooms. The chlorophyll a concentration increa…
We have developed a loss estimation method that is applicable to three-phase ac reactors using amorphous cores in a 400-kVA UPS. The method is based on measured the B–H curves and iron losses of the cores, modeled with magnetic simulations of a finite-element method considering the directions of the amorphous ribbon p…
Abstract BACKGROUND Copolymer poly(3‐hydroxybutyrate‐ co ‐4‐hydroxybutyrate), P( 3HB ‐ co ‐ 4HB ) has gained importance in biotechnological processes due to its potential as an absorbable material in biopharmaceutical applications. The aim of the present study was to investigate the implementation of mixed substrate c…
The spectral phonon transport properties of bulk wurtzite GaN are investigated with the Monte Carlo method on the basis of the first principle calculations. Contributions of different phonon modes to the thermal conductivity with respect to the phonon frequency, mean free path, and wavelength are studied and the effec…
Abstract We have applied a phenomenological two‐level Ising‐like model to study the case of 3D coordination polymers showing strongly cooperative but incomplete spin‐transition behaviour. Our numerical results focus on nanoparticles of the cyanide‐bridged 3D network Fe(pyrazine)[Pt(CN) 4 ], considering several factors…
Two new disc-like heptanuclear complexes [Ni7(mmimp)6(MeO)6]·2(ClO4) (1), [Ni7(mmimp)6(MeO)6]·2(NO3) (2) were synthesised, where Hmmimp is 2-methoxy-6-methyliminomethyl-phenol. The two compounds were characterised by elemental analysis, IR and X-ray single-crystal diffraction. Compounds 1 and 2 are heptanuclear cluste…
Azo-based compounds are a class of switchable systems that have been widely investigated. Furthermore, they are also important for the construction of macrocycles with photoresponsive characteristics. In recent years, there have been many reports describing versatile photoswitchable azo-macrocycles. In addition, the p…
We have used first-principles calculations to investigate the trends in mixing thermodynamics of ScN-based solid solutions in the cubic B1 structure. 13 different Sc1−xMxN (M = Y, La, Ti, Zr, Hf, V, Nb, Ta, Gd, Lu, Al, Ga, In) and three different ScN1−xAx (A = P, As, Sb) solid solutions are investigated and their tren…
Cu-Ni alloy layers with a bimodal porosity -a spongy material made of submicron dendrites, featuring macroscopic pores tens of microns large -can be deposited from baths containing the metal ions, sodium citrate and ammonium sulfate, using large current densities (-3 A cm -2 ) producing vigorous hydrogen evolution.All…
A hydrothermal synthesis of densely packed ZnO nanowires was realized in a confined space via forced circulation of the heated growth solution through microfluidic channels formed primarily by a set of high aspect ratio trenches in a Si substrate. A uniform and conformal seeding layer of ZnO was deposited to cover the…
We present ultraviolet–visible (UV/vis) range photodetectors (PDs) based on thin film ZnO (n)/Si (p) heterojunction diodes. ZnO films are grown by the atomic layer deposition (ALD) technique at growth temperatures of 80, 150, 200 and 250 ° C. The fabricated ZnO (n)/Si (p) photodetectors (ZnO–Si-PDs) show good electric…
Propagation of an optical pulse through a diffraction grating that has a resonance near the pulse central wavelength is discussed. We show that under definite conditions the envelopes of reflected and transmitted pulses may represent the derivative of the incident pulse envelope. Based on the resonance representation…
A microfluidic-based directed assembly strategy is employed to form highly aligned supramolecular structures. Formation of aligned synthetic oligopeptide nanostructures is accomplished using planar extensional flow, which induces alignment of underlying material suprastructures. Fluidic-directed assembly of supramolec…
Spiders in the Orbiculariae spin orb webs that dissipate the mechanical energy of their flying prey, bringing the insects to rest and retaining them long enough for the spider to attack and subdue their meals. Small prey are easily stopped by webs but provide little energetic gain. While larger prey offer substantial…
Yttrium vanadate nano-particles doped with single and multi ions (Sm 3+ , Eu 3+ , Bi 3+ ) have been successfully synthesized at room temperature by optimized co-precipitation method. Doped orthovanadate forms monophasic nanocrystals in the 10–50 nm size range. Photoluminescence (PL) excitation shows broad band in the…