Materials Literature
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Many studies of the elegant architectures of orb webs are conducted in controlled laboratory environments that remove environmental variability. The degree to which spider behavior in these circumstances resembles that of spiders in the wild is largely unknown. We compared web architecture and silk investment of furro…
Nickel-copper compositions for catalytic oxidation of carbon(II) oxide to carbon(IV) oxide were prepared by impregnation of oxide films on titanium surface, obtained by plasma electrolytic oxidation followed by annealing. Plasma electrolysis oxide coatings with a layer thickness of 5 to 50 μm were generated using diff…
For the past decade TNO has been involved in the research and development of atmospheric pressure CVD (APCVD) and plasma enhanced CVD (PECVD) processes for deposition of transparent conductive oxides (TCO), such as tin oxide and zinc oxide. It is shown that by combining precursor development, fundamental gas phase and…
The deposition of ultrananocrystalline diamond (UNCD)/amorphous carbon composite films using a coaxial arc plasma gun in vacuum and, for comparison, in a 53.3 Pa hydrogen atmosphere was spectroscopically observed using a high-speed camera equipped with narrow-band-pass filters. UNCD crystallites with diameters of appr…
The structure and crystal phase of the nanocrystalline powders of Ni1–xCdxFe2O4 (0≤x≤0.5) mixed ferrite, synthesized by wet chemical co-precipitation method, were characterized by X-ray diffraction. Results showed that the lattice parameter increased with increasing Cd concentration. Microstructure was studied by scan…
The electronic properties of armchair graphene nanoribbons (AGNRs) can be significantly modified from semiconducting to metallic states by applying a uniform perpendicular magnetic field (B-field). Here, we theoretically study the band gap modulation induced by a perpendicular B-field. The applied B-field causes the l…
Development of biodegradable tough elastomeric scaffolds are important for engineering tissues such as myocardium and heart valves that experience dynamic environments in vivo. Biomaterial scaffolds should ideally provide appropriate physical, chemical and mechanical cues to the seeded cells to closely mimic the nativ…
We investigated the responses of several solarization-resistant (SR) multimode optical fibers to high dose-rate (> 100 Mrad/s), low dose-rate (5 krad/s) X-rays and very low dose-rate (0.3 rad/s) 1 MeV γ-rays. We characterized the radiation-induced attenuation (RIA) and radiation-induced emission (RIE) phenomena in the…
A 10-layer recordable optical disc with an inorganic recording material, Bi–Ge–O, was fabricated and the recording characteristics were measured using a Blu-ray Disc-based apparatus with a wavelength of 405 nm and a numerical aperture of 0.85. Practical signal quality was obtained from all the layers at densities of 2…
Radionuclide incorporation into the alteration products of corroded UO 2 in used nuclear fuel may control the release and mobility of key radionuclides, such as the very long-lived minor actinide, 237 Np (τ 1/2 = 2.1 Ma). Studtite, [UO 2 (O 2 )(H 2 O) 2 ](H 2 O) 2 , may form in the presence of peroxide produced by rad…
This paper deals with the dynamic analysis of carbon nanotube with surface deviation along its axis. The type of carbon nanotube used in this analysis is a single-walled carbon nanotube that is doubly clamped at a source and a drain and this type of nanotube is used to represent a single mode resonator. In previous st…
We present the results of measuring the strength properties of metals and alloys with face-centered cubic lattice (copper, aluminum), body-centered cubic structure (Armco iron, tantalum), hexagonal close-packed structure (titanium and titanium alloy BT6) in the original coarse-grained and submicrocrystalline state und…
Evolution of the microstructure that is formed in a coarse-grained commercial Al-6% Mg-0.4% Mn-0.3% Sc alloy upon equal-channel angular pressing (ECAP) in the temperature range from 200 to 450°C (∼0.5–0.8T m) has been studied. The samples were deformed through route A up to a true strain ɛ ∼ 12 and quenched in water a…
The X-ray electron photoemission spectra of a Tl 0.7 Bi 0.3 Sr 1.6 Ba 0.4 CaCu 2 O y superconductor were measured with Al K and Mg K radiation at room temperature. The Bi 4f spectrum was compared to the same spectra of Bi 1.75 Pb 0.35 Sr 1.9 Ca 2.05 Cu 3.05 O y and Tl 0.6 Pb 0.4 Sr 1.6 Ba 0.4 Ca 2 Cu 3 O y superconduc…
Nitrous oxide (N2O) emissions from nitric acid production worldwide have been estimated at about 400,000 t/a, equivalent to 120 million t/a CO2e, making nitric acid manufacture the largest single industrial process source of N2O. Uhde's NOX and N2O abatement technology has been developed to permit high rates of N2O ab…
The hysteretic differential susceptibility in both cases magnetization and demagnetization processes was modeled for Ni 0.58 Zn 0.42 Fe 2 O 4 nanocrystalline and Fe 3 O 4 nano wire arrays. It was formulated hysteretic loop of nanoscale magnetic materials in both magnetization and demagnetization processes. Energy loss…
Ottoite, Pb 2 TeO 5 , is a new tellurate from Otto Mountain near Baker, California. Most of the mining on Otto Mountain occurred between 1940 and 1970 and is attributed to Otto Fuetterer, for whom the mountain is now named. The new mineral occurs on fracture surfaces and in small vugs in brecciated quartz veins, which…
Abstract Cobalt titanate (CoTiO 3 ) powder was prepared by a modified sol‐gel method. The precursor solution could be prepared by cobalt acetate and titanium isopropoxide using various solvents either with or without HCl. After post‐heat treatment in air from 500 to 900 °C, CoTiO 3 powder with increasing crystallinity…
We report a miniature rotary-linear piezoelectric actuator with a single cubic stator of side length 3.5 mm which can generate rotary motion around the center axis and linear motion in the axial direction. The stator is fabricated as a single metallic cube of side length 3.5 mm with a 2.5-mm diameter through-hole and…
The efficiency of multi-watt ultraviolet radiation generation by harmonics processes in β-BaB 2 O 4 (BBO) can be improved by reducing thermal dephasing. The dephasing arises from local heating of BBO by the linear absorption of green (second harmonic) and ultraviolet (fourth harmonic) radiation by crystal defects that…