Materials Literature
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We have demonstrated the fabrication and characterization of hybrid CdSe-ZnS quantum dot (QD)-InGaN-GaN quantum well (QW) red light-emitting diodes (LED). The red-emitting QD-resin blend was dropped on the InGaN blue LED to complete the device fabrication. With proper blend ratio, the blue light from the InGaN QWs can…
CdS/PbS core−shell nanoparticles are grown via ion-exchange reaction route. Devices based on such nanoparticles exhibit electrical bistability and memory phenomena. We show that the bistability is due to charge confinement in the nanoparticles. Here, although the low-bandgap material allows facile carrier injection fr…
The flammability and the thermal oxidative degradation kinetics of expandable graphite (EG) with magnesium hydroxide (MH) in flame‐retardant polypropylene (PP) composites were studied by limiting oxygen index (LOI), UL‐94 test, and thermogravimetric analysis (TGA). The results show that EG is a good synergist for impr…
This paper presents and evaluates the effect of charge/discharge rate on the supercapacitor’s temperature. Experiments show that during charging the temperature rises more than during discharging. The paper also investigates the supercapacitor’s energy efficiency as a function of the discharge time and the level of th…
Abstract Deposition of thin and smooth nanocrystalline diamond films requires a high degree of control of the nucleation stage. The nature of the interface between diamond film and substrate is also important for some applications. The successive steps of the bias‐enhanced nucleation (BEN) process are studied in‐situ…
The dynamics of a laser-induced cavitation bubble created near solid boundary is investigated using a new force sensor together with a hydrophone. The experimental results indicate that liquid-jet formation and acoustic transient emission are general features of bubble dynamics; liquid-jet formation occurs earlier tha…
Histidine phosphatases are a class of enzymes that are characterized by the presence of a conserved RHGXRXP motif. This motif contains a catalytic histidine that is being phosphorylated in the course of a dephosphorylation reaction catalyzed by these enzymes. Prostatic acid phosphatase (PAP) is one such enzyme. The de…
Homogeneous and fine bismuth titanate (BIT) nanoplate‐like powders were synthesized by a modified and simple sol–gel method. The thermal gravimetry‐differential thermal analysis‐derivative differential thermal analysis indicated that BIT gel decomposes in two steps posited at approximately 278° and 432°C, and BIT bega…
Crack-free, lead zirconate titanate (PZT) films with a thickness range of 20–100 µm were deposited on silicon substrate by aerosol deposition (AD) process using powders containing 1–12 wt % of organic species prepared by sol–gel route. The as-deposited films were annealed at 700 °C for 5 min by rapid thermal annealing…
Aligned CdS nanowire arrays have been fabricated directly on a Cd foil via a simple solvothermal method. The metal Cd foil serves as both the Cd source and substrate during fabrication of the aligned CdS nanowire arrays. The morphology, structure, and composition of the samples are characterized by x-ray diffraction,…
The synthesis and magnetic properties of the oxalate-based molecular soluble magnets with general formula [K(18-crown-6)] 3[M (II) 3(H 2O) 4{M (III)(ox) 3} 3] (M (III) = Cr, Fe; M (II) = Mn, Fe, Ni, Co, Cu; ox = C 2O 4 (2-)) are here described. All the reported compounds are isostructural and built up by 2D bimetallic…
We report novel grain-orientation technology, magnetic-field-assisted electrophoretic deposition (B-assisted EPD), for synthesizing bismuth layer–structured ferroelectric ceramics. Grain-oriented Bi4Ti3O12–BaBi4Ti4O15 ceramics obtained by the B-assisted EPD is shown to exhibit enhanced polarization and piezoelectric p…
Electrodeposition of a metallic Al layer on a Mg alloy from a Lewis acidic Al chloride–1-ethyl-3-methylimidazolium chloride (EMIC) ionic liquid has been carried out at room temperature. The effects of the AlCl3 to EMIC molar ratio, in the range from 50%–50% to 60%–40%, on the electrodeposition characteristics were inv…
Flexoelectric effects are studied in the domain walls of a nematic liquid crystal device showing the Freedericksz transition. Walls parallel to the alignment direction have a strong twist distortion and an electro-optic effect dominated by e1-e3 is seen. Walls perpendicular to the alignment direction have a strong spl…
The synthesis and the thermal stability of the high pressure and high temperature perovskite phase BiCrO 3 have been studied. BiCrO 3 can be synthesized in a wide range of pressure (1-6GPa) and temperature (690-865°C). The thermal behavior of BiCrO 3 depends on the atmosphere: it tends to be stable under inert gas whe…
The feasibility of etching Cu/low-k interconnects by using a low global warming potential CF3I plasma was studied. Low-damage etching was done and porous SiOC (p-SiOC, k<2.6) film with low roughness was produced. Exposing p-SiOC film to CF3I plasma was found to suppress the decrease in the CH3 group and the inc…
Al-doped ZnO (AZO) films were deposited onto glass substrates by RF magnetron sputtering for solar cell applications. The effects of the Al 2 O 3 doping concentration on the structural, electrical, and optical properties of the AZO films were investigated. As the Al 2 O 3 doping concentration was increased to 4.0 wt %…
In this report, we discuss the progress in synthesis of new binary phases from B-C-N triangle in DAC under high-pressure and high-temperature (HPHT) conditions: cubic C 3 N 4 ( c -C 3 N 4 ) and diamond-like BC 3 ( d -BC 3 ) phase. These two phases have been synthesized by direct transformation from graphitic phases un…
A new formation method of Ohmic contacts without postannealing was proposed for p-type boron-doped diamond. The diamond surface was partially covered with Au electrodes and then illuminated with vacuum ultraviolet light in an oxygen atmosphere. Through these processes, the hydrogen-terminated diamond surface was oxidi…
Abstract Cyclic 1,3,5,7-tetrakis(trimethylsilyl)tetraphenyltetrasilsesquioxane (T4OTMS), 3,7,14-tris(trimethylsilyl)heptaphenyltricyclo[7.3.3.15,11]heptasilsesquioxane (T7OTMS), and 5,11,14,17-tetrakis(trimethylsilyl)octaphenyltetracyclo[7.3.3.33,7]octasilsesquioxane (DDT8OTMS) were found to be formed by the hydrolysi…