Materials Literature
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In this study, we demonstrated high efficiency InGaN/GaN light emitting diodes (LEDs) with asymmetric triangular multiple quantum wells (MQWs). Asymmetric triangular MQWs not only contribute to uniform carrier distribution in InGaN/GaN MQWs but also yield a low Auger recombination rate. In addition, asymmetric triangu…
This fundamental contribution on time‐of‐flight secondary ion mass spectrometry polymer depth‐profiling by massive argon clusters is focused on the investigation of the influence of the Ar cluster size and the molecular weight of the investigated polymers on the efficiency of the sputtering process. For this purpose,…
The aggregation processes of amyloid-β-(16-22) peptides (Aβ16-22) are investigated by atomic force microscopy (AFM). It is found that Aβ16-22 peptides quickly aggregate from monomers to oligomers and flakelike structures and finally to fibrils. In particular, unusual morphology change is observed in an early stage of…
The influence of substrate miscut on Al0.5Ga0.5 N layers was investigated using cathodoluminescence (CL) hyperspectral imaging and secondary electron imaging in an environmental scanning electron microscope. The samples were also characterized using atomic force microscopy and high resolution X-ray diffraction. It was…
A systematic structural analysis of FePt, CuAu, and Au icosahedral nanoparticles is presented. The uncovered particles are prepared by inert gas condensation and thermally equilibrated through in-flight optical annealing. Aberration-corrected high-resolution transmission electron microscopy reveals that the crystal la…
Titanium and its alloys are widely used in aerospace and medical implants due to their excellent mechanical and chemical properties. Titanium is light, strong, corrosion resistant, and biocompatible; however, it has poor machinability. The low thermal conductivity and high strength result in large cutting forces and e…
Abstract Monodispersed Pt3Sn nanoparticles were prepared through a mild thermal synthesis in the presence of surfactants. The performance of Pt3Sn for the electrooxidation of ethanol and adsorbed carbon monoxide (COad) in acid medium was studied by a combination of electrochemical and in situ spectroscopic methods, na…
Preparation and characterization of soy lecithin (SL) and palm oil (PO) based organogels have been reported in this study. The optimization of the composition of the organogels was carried out by varying the proportions of SL, PO and water. Microscopic studies suggested the presence of aqueous phase either as spherica…
BACKGROUND: Drug-induced pemphigus (DIP) shows clinical, histopathological and immunological features of pemphigus. However, little is known about immunological profiles in DIP. OBJECTIVES: To characterize clinical and immunological profiles in patients with DIP. METHODS: We studied 17 Japanese patients with DIP who w…
In this study, we demonstrate linearly polarized organic photovoltaic cells with a well-controlled level of polarization sensitivity. The polarized devices were created through the application of a large uniaxial strain to the bulk heterojunction poly(3-hexylthiophene):Phenyl-C61-butyric acid methyl ester (P3HT:PCBM)…
The high-frequency mobility of positive charges (holes) moving along the backbones of an extensive data set of 7 oligomers ( n = 2–16) and 6 polymers (⟨ n ⟩ = 26–138) of fluorene was measured using pulse-radiolysis time-resolved microwave conductivity (PR-TRMC) in benzene. As expected, at 8.9 GHz, the measured isotrop…
Electron-deficient Pt 2 M 2 Pt 2 hexanuclear clusters, [Pt 4 M 2 (μ-dpmp) 4 (XylNC) 2 ](PF 6 ) 4 (M = Pt ( 7 ), Pd ( 8 ); dpmp = bis((diphenylphosphino)methyl)phenylphosphine), were synthesized by oxidation of hydride-bridged hexanuclear clusters [Pt 4 M 2 (μ-H)(μ-dpmp) 4 (XylNC) 2 ](PF 6 ) 3 (M = Pt ( 2 ), Pd ( 3 ))…
The intrinsic stress evolution during formation of ultrathin amorphous oxide films on Al(111) and Al(100) surfaces by thermal oxidation at room temperature was investigated in real-time by in-situ substrate curvature measurements and detailed atomic-scale microstructural analyses. During thickening of the oxide a cons…
The objective of this study was to determine the antioxidant activity of different pineapple varieties namely Josephine ( Ananas comosus L. var. comosus cv. Josephine), Morris ( Ananas comosus L. var. comosus cv. Morris), and Sarawak ( Ananas comosus L. var. comosus cv. Sarawak). Different concentrations of methanol,…
Split second: The photocatalytic activity of gallium oxide (β-Ga2 O3) depends strongly on the co-catalysts CuOx and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu(2+) and CrO4 (2-). The water-splitting activity can be tuned by varying the Cu loading in the range 0.025-1.5 wt %…
The band-alignment of atomic layer deposited (ALD)-HfO2/Al0.25Ga0.75N was studied by high resolution x-ray photoelectron spectroscopy measurements for both the non-passivated and SiH4 passivated AlGaN surfaces. The valence band offset and the conduction band offset for the ALD-HfO2/Al0.25Ga0.75N interface were found t…
We have studied ferromagnetic nickel thin films patterned with square lattices of elongated antidots that are negative analogues of square artificial spin ice. Micromagnetic simulations and direct current magnetic moment measurements reveal in-plane anisotropy of the magnetic hysteresis loops, and the formation of a d…
The heteroepitaxy of tetragonal Cu2ZnSnS4 (CZTS) thin films on hexagonal sapphire (0001) single crystal substrates is successfully obtained by radio frequency magnetron sputtering. The sputtered CZTS film has a mirror-like smooth surface with a root mean square roughness of about 5.44 nm. X-ray θ-2θ scans confirm that…
Levodopa-induced dyskinesias (LIDs) represent one major motor disability of Parkinson's disease (PD) therapy. Thus, research effort is still devoted to finding agents that may improve parkinsonism and concomitantly reduce or avoid dyskinesia. Rodent and nonhuman primate models provide useful tools to study the molecul…
Single heterojunction organic photovoltaic cells based on co-evaporated donor–acceptor layers with power conversion efficiencies (η) above 5.5% are demonstrated, using either high (1.8 eV) or low (1.4 eV) optical gap materials. The high energy absorbing cell utilizes a high fullerene-C70 content, in combination with a…