Materials Literature
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Cutting costs with copper: Facile dissociation of hydrogen molecules on isolated Pd atoms followed by diffusion to the dominating Cu surface are the two key ingredients for a novel class of bifunctional catalysts. The resulting H atoms are weakly bound to the catalyst surface and are readily available for subsequent s…
The effects of SiC ceramic particles on the macromorphologies, microstructures and mechanical properties of tungsten inert gas welded AZ31 magnesium alloy joints with Cr2O3 flux coating were investigated. The results showed that an increase in the amount of SiC ceramic particles contained in the Cr2O3 flux coating led…
PURPOSE: A simulation of buildup factors for ordinary concrete, steel, lead, plate glass, lead glass, and gypsum wallboard in broad beam geometry for photons energies from 10 keV to 150 keV at 5 keV intervals is presented. METHODS: Monte Carlo N-particle radiation transport computer code has been used to determine the…
Recent electrochemical experiments on gold-based photonic metamaterials have shown a sizable reversible tuning and modulation of plasmonic resonances. Here, we study the mechanism of the electrochemical modulation by measuring the change of the resonance transmittance and resonance frequency during underpotential depo…
Highly transparent ZnO thin films were deposited on glass substrates by using a simple and inexpensive multi-step sol–gel spin coating process. This research investigated the effects of annealing temperature in the range from 350–600°C on the microstructure, surface morphology and optical properties of thin films by u…
Single charge detection is demonstrated in the capacitively coupled integrated single electron transistors (SETs) in single-walled carbon nanotubes (SWCNTs) quantum dots. Two SETs are fabricated based on two different SWCNTs aligned in parallel, by taking advantage of the aligned growth of SWCNTs and subsequent transf…
One of the most challenging open key questions behind the stereoinversion of D-glutamate and L-glutamate catalyzed by glutamate racemases is how those enzymes manage to generate the thermodynamically unfavorable reverse protonation state of the catalytic residue cysteine required for the proton abstraction from the α-…
Abstract A–B–A tri‐block copolymers of poly(L‐lactide) (PLLA: A) and poly(ethylene glycol) (PEG: B) and those of poly(D‐lactide) (PDLA: A) and PEG (B) were prepared and suspended in saline. Mixing suspensions consisting of the enantiomeric copolymers with identical block compositions induced a temperature‐dependent so…
In the present study, a new class of biodegradable graft copolymers of polystyrene (PS) with aliphatic polyester (APE) side chains were synthesized through combination of nitroxide-mediated free radical polymerization (NMRP) and ring-opening polymerization (ROP) with copper (I)-catalyzed ‘click’ chemistry. First, the…
Impact and penetration studies for a wide variety of projectile/penetrator compositions and geometries along with target compositions have demonstrated reasonable if not revealing correlations between two-dimensional (2D) computer simulations of these events and corresponding microindentation measurements and maps. Re…
Magnetic properties of epitaxially grown ultrathin La2/3Sr1/3MnO3 (LSMO) films down to a thickness of one unit cell (u.c.) have been systematically investigated by studying their magnetic behaviors with Co capping layers. For LSMO thickness below 3 u.c., the Co/LSMO bilayers exhibit strong exchange bias (EB) effects a…
Spin selectivity in angle-resolved Auger photoelectron coincidence spectroscopy (AR-APECS) is used to probe electron correlation in ferromagnetic thin films. In particular, exploiting the AR-APECS capability to discriminate Auger electron emission events characterized by valence hole pairs created either in the high o…
We present an analysis of factors influencing carrier transport and electroluminescence (EL) at 1.5 µm from erbium-doped silicon-rich silica (SiOx) layers. The effects of both the active layer thickness and the Si-excess content on the electrical excitation of erbium are studied. We demonstrate that when the thickness…
Abstract A self‐designed rotation extrusion system was adopted to extrude polyethylene (PE) pipe. The experimental results showed that when the mandrel and die rotated in the same directions during the PE pipe extrusion, apart from the axial stress, all polymer melts in PE pipes were also subjected to the hoop stress…
Photoactivatable fluorophores switch from a nonemissive to an emissive state upon illumination at an activating wavelength and then emit after irradiation at an exciting wavelength. The interplay of such activation and excitation events can be exploited to switch fluorescence on in a defined region of space at a given…
Employing a combination of ab initio band-structure theory and dynamical mean-field theory we explain the experimentally observed linear temperature increase of the magnetic susceptibility of the iron pnictide material BaFe${}_{2}$As${}_{2}$. The microscopic origin of this anomalous behavior is traced to a sharp peak…
Abstract Poly(hydroxybutyrate‐co‐hydroxyvalerate) (PHBV) is a natural polyester known for its biocompatibility and biodegradability. The hydrolysis of PHBV nanoparticles (90–150 nm) and microparticles (33–58 µm) was investigated. Particles were formulated from preformed polymer(s) by miniemulsification/solvent evapora…
The development of magnetic nanoparticles with multiple functions has been an ever-growing field because of their diverse applications in drug delivery, biosensing, cell labeling, and so on. In this study, a facile method was developed to construct multifunctional magnetic nanocomposites. The approach is based on the…
Abstract Phase change memory (PCM) has opportunities of various applications on the premise of its high performance operations, which are still to develop with innovations such as change of a memory material. In respects of high‐speed and high‐scalability memory characteristics, δ‐phase Ge‐doped SbTe (GeST) materials…
By in situ uniaxial-tensile tests with dynamic and atomic scale observation, we report the quantitative investigation of strain-induced deformation-twinning process through incoherent twin boundary propagation in nanocrystalline Au. The consecutive and quantitative strain maps revealed that a strong compressive strain…