Materials Literature
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A study was conducted to clarify phylogenetic affiliations of polyhydroxyalkanoate (PHA)-accumulating microorganisms in full-scale activated sludge processes. Activated sludge samples obtained from three full-scale activated sludge processes were aerobically incubated with excess acetate to increase their PHA content.…
Cyclization and cycloreversion reactions of a photochromic diarylethene derivative, bis(2-methyl-5-phenylthiophen-3-yl)perfluorocyclopentene, in crystalline phase were investigated by means of picosecond laser spectroscopy. Rapid cyclization within a few picoseconds, as comparable to that in solution phase, was confir…
Using an oblique angle deposition technique, an array of well-aligned and tilted TiO2 nanorods has been fabricated by electron-beam evaporation method. The as-deposited TiO2 nanorod array is amorphous and porous with fibrous fine structures on the surface of individual nanorods. After annealing, the amorphous TiO2 cry…
Two self-complementary phenanthroline-strapped porphyrins bearing imidazole arms and C 12 or C 18 alkyl chains were synthesized, and their surface self-assembly was investigated by atomic force microscopy (AFM) on mica and highly ordered pyrrolitic graphite (HOPG). Upon zinc(II) complexation, stable porphyrin dimers f…
Mn-doped ZnS nanorods synthesized on zinc foils by a solvothermal approach exhibited white light emission upon excitation in the UV range (300−330 nm). X-ray diffraction studies coupled with energy-dispersive X-ray analysis and X-ray photoelectron spectroscopy indicated the presence of a thin oxide layer on the Mn-dop…
The split-ring resonator (SRR) with a rotated inner ring is analyzed to assess the controllability of its magnetic resonant frequency. Numerical simulations were carried out to verify the proposed theory and the controllability. The results show that by rotating the inner ring, magnetic resonant frequency of SRR incre…
The size controllability of oxide nanowires formed via vapor-liquid-solid (VLS) mechanism is desired for the oxide nanowire-based device applications. However, the complex nature of oxide nanowire VLS growth has held back such size controllability. Here we demonstrate the critical size effect of a Au catalyst on MgO n…
Magnetoresistance (MR) behavior of vinyl ester monomer stabilized iron nanoparticles and heat-treated vinyl ester resin nanocomposites reinforced with iron nanoparticles were investigated. Vinyl ester monomer serves as a coupling agent with one side covalently bound onto the nanoparticle surface by a displacement reac…
This paper presents a comprehensive optical study of double-wall carbon nanotubes (DWNTs) grown by chemical vapor deposition, using optical absorption, photoluminescence (PL), and Raman spectroscopies. Extending the spectral ranges of absorption and PL measurements beyond 2300 nm made it possible to detect signals bot…
Computational investigations into the ground and singlet excited-state structures and the experimental ground-state absorption spectra of N-confused tetraphenylporphyrin tautomers 1e and 1i and N-confused porphines (NCP) 2e and 2i have been performed. Structural data for the ground state, performed at the B3LYP/6-31G(…
We describe herein studies on as-prepared hydrophobic ZnS-CdSe quantum dots (QDs) at the air-water interface. Surface pressure-area (pi-A) isotherms have been used to study the monolayer behavior. Uniform, lamellar multilayer thin films of QDs were deposited by the Langmuir-Blodgett (LB) technique. The role of two dif…
This study prepared (1−x)BaTiO3–xCaTiO3 (x=0–1) (denoted as BCT), (0.95−x)BaTiO3–xCaTiO3–0.05SrTiO3 (x=0.00–0.95) (denoted as BS5CT), and (0.90–x)BaTiO3–xCaTiO3–0.10SrTiO3 (x=0.00–0.90) (denoted as BS10CT) ceramics. Their preparation and structural and dielectric properties were characterized. The results show that th…
IR and Raman data were obtained from α-, β-, and mixed (β,γ)-Ca(BH 4 ) 2 samples and from the deuterated β,γ phase mixture. The results obtained with α phase indicate that the DFT calculated values for the B−H stretching modes and the lattice vibrations are fairly close to the experimental values. The spectral behavio…
We report fabrication of phase change random access memory (PRAM) using nanowires (NWs) of GeTe and In2Se3. NWs were grown by a vapor-liquid-solid technique and ranged from 40 to 80 nm in diameter and several micrometers long. A dynamic switching ratio (on/off ratio) of 2200 and 2 times 105was realized for GeTe and in…
Abstract Molybdenum-base alloys have excellent high temperature mechanical properties and joining of these alloys as heat sink materials is envisaged in many structural applications of fusion reactors. TZM is an important Mo-base alloy and diffusion bonding experiments were carried out in a hot vacuum press by sandwic…
A new yield loss mechanism is described that is related to the etching of Cu in deionized water. Water that contains high concentrations of dissolved oxygen can etch Cu at the bottom of vias during pre-metallization wet cleans. The etching creates voids in the Cu which remain after metallization, resulting in high res…
By taking advantage of short-line reliability improvements in circuit-level reliability analyses and in modified layout strategies, the severe reliability constraints on future interconnect technology can be significantly addressed. To do this though, the effective length of laid-out interconnect trees must be used in…
This project focuses on the effect of annealing temperature to electrical properties of deposited Zinc Oxide (ZnO) thin film. ZnO solutions made from Zinc acetate dehydrate (ZnAC), 2-Methoxyethanol and monoethanolmine (MEA) are deposited onto glass substrates using spin coating technique. Deposited films are annealed…
Material microstructure is a significant determinant of the tensile stress at which materials fail. Using a high-energy laser to drive shocks in thin slabs, we have explored the role material microstructure plays on the spall strength of high-purity and alloyed aluminum at strain rates of (2–7.5)×106s−1. Slabs of pure…
The hydrogen embrittlement susceptibility of high strength TRIP/TWIP steels with the tensile strength of 600Mpa to 900Mpa grade was investigated using cathodically hydrogen charged specimens. TWIP steels with full austenite structure show a lower hydrogen content than do TRIP steels. The uniform distribution of strong…