Materials Literature
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The lifetimes of non-equilibrium minority carriers, which bound with the diffusion length, are considered as two important parameters of the low-quality multicrystalline silicon (mc-Si) substrate. Its value defines the quality of the initial substrate. It is also subjected to change as a result of many high-temperatur…
A method is proposed to determine the eigenfrequencies of nanostructures (nanotubes and nanocrystals) by measuring the eigenfrequencies of a “large system” that comprises an array of vertically oriented similar nanotubes or nanocrystals equidistantly grown on a substrate. It is shown that the eigenfrequencies of a sin…
The process for the site-controlled formation of tunnel pits with high aspect ratios by anode etching of Al(100) foil is described. Introduction of a small amount of Cu on the Al foil, which has a patterned thin layer of polymers, initiated the uniform development of pits and generated the tunnel pits with sufficientl…
It was elucidated that treeing lifetime can be drastically extended especially under the condition of electric field as low as design field in epoxy/silica nanocomposites, if nano fillers are properly dispersed in good contact with surrounding polymer matrices. It was actually found that there is a distinctive differe…
Capsules based on sodium alginate (SA) and sodium cellulose sulphate (SCS), have been prepared using polyvinylamines (PVAm) of varying intrinsic viscosities. The resulting capsules are relatively dense in nature, revealing a bursting force which is four times that observed for the classical SA/SCS/polymethylene-co-gua…
In this study, mechanical properties of high density polyethylene (HDPE) and polypropylene (PP)-wood flour composite (WFC) decking boards were evaluated and the effect of maleated polypropylene (MAPP) as a coupling agent was investigated. Decking boards were manufactured using Davis-Standard® WT-94 WoodtruderTM. Flexu…
Compounds with the general formula were prepared by the citrate route for use in solid oxide fuel cells (SOFCs). A solid solution region containing hexagonal perovskite phase was formed when , in which the oxygen content in air changes from oxygen stoichiometry to oxygen excess with Mn doping. The temperature dependen…
A novel trisulfide‐containing thiophene, 1,5‐dihydrothieno[3,4‐e][1,2,3]trithiepine (5), and a disulfide analogue, 1,4‐dihydrothieno[3,4‐d][1,2]dithiine (4), were designed and synthesized. All the compounds were characterized by FT‐IR, NMR, Raman, MS, and elemental analysis, some of which were confirmed by single‐crys…
With the example of two isostructural poly(ether imides), the effects of isopropylidene and hexafluoroisopropylidene groups and hydrogen bonding with chloroform on changes in geometry and energy parameters of polymer chains have been analyzed. The relationship between changes in the geometry characteristics of polymer…
Polycationic water-soluble metallomacrocycles possessing 12 positive charges that facilitate ionic coordination with the carboxylate moieties of Oxi-SWNTs form a nanotube composite en route to tailored electronic properties. The multiple ionic pair interactions between the positively charged metallohexamers and carbox…
The angular distribution of desorbing N(2) was studied in both the thermal decomposition of N(2)O(a) on Rh(100) at 60-140 K and the steady-state NO (or N(2)O) + D(2) reaction on Rh(100) and Rh(110) at 280-900 K. In the former, N(2) desorption shows two peaks at around 85 and 110 K. At low N(2)O coverage, the desorptio…
Co-crystals of L-leucyl-L-leucyl-L-leucine tripeptide (LLL) with pyridine (Py), α-picoline (2-MePy), β-picoline (3-MePy) and γ-picoline (4-MePy) have been prepared and studied. Single-crystal XRD analyses reveal the following formulas: LLL*(Py) (1), LLL*(2-MePy)*0.12(H2O) (2), LLL*(3-MePy) (3), and LLL*(4-MePy)*0.14(H…
Electroluminescence at 1.28mum is observed in a nanopatterned silicon test structure that has been subjected to carbon implantation followed by solid-phase epitaxial regrowth for recrystalization. The sub-bandgap luminescence comes from a di-carbon complex known as 'G center'. Enrichment of silicon with carbon atoms h…
Two kinds of materials, sprayed-on crocidolite and sprayed-on amosite, containing crocidolite and amosite respectively, were treated with aqueous acetic acid solution, the pH of which was adjusted with an ammonium acetate buffer at 5, in order to remove soluble components of cement. The liquids were filtrated with a m…
硫黄ガス環境での銀の腐食を管形容器および箱形容器を用いて検討した．単体硫黄から放出される硫黄ガスは，管形容器内の銀板および箱形容器内の腐食センサの銀電極と反応する．銀板の表面に形成された腐食生成物の厚さはカソード還元法により，銀電極の表面に形成された腐食生成物の厚さはレジストメトリにより測定した．暴露後に銀板および銀電極の表面に形成された腐食生成物を分析し，硫化物であることを確認した．単体硫黄から放出される硫黄ガス環境で銀の腐食速度を決定するのは硫黄ガスの拡散である．単体硫黄から放出される硫黄ガス環境での銀の腐食速度は，腐食反応を考慮した拡散ネットワークモデルを用いて推定される．硫黄ガスは，3×10－5の反応確率に対応する一定速度…
A number of secondary and tertiary chlorin e 6-13-amides were synthesized in high yield by the action of primary and secondary amines on methylpheophorbide a under mild conditions. Unlike the secondary amides, tertiary 13-amides were shown to exist as two stereoisomers differing by orientation of the amide group plane…
We have synthesized three new 1,3-diazaazulene derivatives, namely, 2-(4′-N,N-dimethylaminophenyl)-6-nitro-1,3-diazaazulene (18, DMAPNA), 2-(4′-aminophenyl)-6-nitro-1,3-diazaazulene (19, APNA) and 2-[4′-N-(2-hydroxyethyl)aminophenyl]-6-nitro-1,3-diazaazulene (20, HEAPNA), each of them contains an amino substitute as t…
The Helium Ion Microscope (HIM) offers a new, potentially disruptive technique for nano‐metrology. This methodology presents an approach to measurements for nanotechnology and nano‐manufacturing which has several potential advantages over the traditional scanning electron microscope (SEM) currently in use in integrate…
This paper presents the results of an investigation carried out on the field of short circuit effects upon transformers electromechanical forces calculation. A time domain transformer model based on magnetomotive forces and reluctances is used. This model allows for simulating the transformer transient and steady stat…
and nitrogen-doped films were deposited by dc magnetron sputtering on substrates and the effects of antimony (Sb) and nitrogen (N) doping on microstructure and sheet resistance were investigated. After annealing at various temperatures between 100 and , phase transformations in and nitrogen-doped films were investigat…