Materials Literature
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Liquid crystal polymer (LCP) and Cu thin film cleaned with radio frequency (RF) plasma in a vacuum pressure of 3.0/spl times/10/sup -3/ Pa followed by Cu deposition on LCP were bonded at room temperature. Immediately after bonding, the samples were unloaded, heated in air, argon, nitrogen, hydrogen, and oxygen gases,…
We report the results of the first-principles calculation on the hydrogen storage material CaSi. The stability and bonding nature of CaSi hydride have been investigated theoretically with the ultrasoft pseudopotential method based on the density functional theory before experimentation. Theoretical prediction has sugg…
Abstract The crystal structure of the ordered double perovskite Sr 2 MnTeO 6 has been refined at ambient temperature from high resolution neutron and X‐ray powder diffraction data in the monoclinic space group I 1 2/m 1 with a = 5.6166(1) Å, b = 5.5807(1) Å, c = 7.8797(1) Å and β = 90.048(2)°. The structure is the res…
The impact of photodynamic processes induced by pump radiation in crystals doped with rare-earth (RE) ions on the possibility of generating stimulated radiation in the UV and VUV spectral ranges is analyzed. It is shown that, in addition to objective factors, one of the main causes preventing the lasing effect from be…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
The microscopic mechanism of appearance and evolution of pores and cracks is proposed to investigate the process of micropore nucleation in solids under impact and fixed loadings. The size distribution function and the critical size of pores are defined. The dependencies between the rate of pore nucleation and the rat…
We have investigated the change of the intercalated amount and conformational behavior of dodecyldiamine (C(12)H(28)N(2), di-C(12)amine) inside the confined space of the montmorillonite (MMT) intergallery at different pHs of the intercalation solution (H(2)O/ethanol/Na(+)-MMT/di-C(12)amine), and these results were com…
Dielectric measurements on molecular liquids just above the glass transition indicate that alpha relaxation is characterized by a generic high-frequency loss varying as ω −1/2 , whereas deviations from this come from one or more low-lying beta processes (Olsen et al. , Phys. Rev. Lett. 86 (2001) 1271). Assuming that l…
Natural rubber was reinforced with various concentrations of sisal and coir fibres. Green strength measurements were carried out to determine the fibre orientation. The rubber–fibre interfacial bond was improved by a resorcinol-hexamethylene tetramine dry bonding system. The composites were vulcanized at 150°C, and th…
A micro- or nanopatterned planar-aligned cell ordinarily requires a pair of mirror-image patterned substrates that must be aligned in register to ⪡1μm. As an alternative we examine the director orientation profile of a nematic liquid crystal in a cell composed of one substrate whose easy axis is patterned on micromete…
An inducible phenylserine aldolase (L-threo-3-phenylserine benzaldehyde-lyase, EC 4.1.2.26), which catalyzes the cleavage of L-3-phenylserine to yield benzaldehyde and glycine, was purified to homogeneity from a crude extract of Pseudomonas putida 24-1 isolated from soil. The enzyme was a hexamer with the apparent sub…
Jojoba oil containing polyamide microcapsules having diameter of approximately 5 microm were prepared by inter-facial polycondensation by direct method (oil-in-water). Qualitative effects of both the formulation and the process parameters on microcapsules characteristics were investigated by SEM observations. Morpholo…
Abstract In this study, biodegradable poly(caprolactone) (PCL) hybrids with two types of organoclays: Cloisite 30B (30B) and Cloisite 93A (93A) have been prepared by melt mixing and their barrier performance to air permeation and mechanical properties were investigated. The hybrids of PCL/30B were found to be nanocomp…
The effects of rare-earth oxides (Yb 2 O 3 , Ho 2 O 3 , Er 2 O 3 ) on the temperature stability of acceptor doped BaTiO 3 dielectrics were studied. The samples doped with 1 mol % rare-earth oxides exhibited the highest dielectric constants. Substantial reductions in grain size were observed in the specimens with 1 mol…
Copolymers of styrene‐maleic anhydride, SMA, and maleic anhydride‐α‐olefins (1‐hexene, 1‐octene, 1‐decene, 1‐dodecene, 1‐tetradecene and 1‐hexadecene) have been synthesized by free radical polymerization, using azobisisobutironitrile and benzoyl peroxide as initiators. Copolymers were characterized by gel permeation c…
Deposition of copper thin films was achieved by a photocatalytic reaction of site-selectively adsorbed TiO(2) nanocrystals for direct fabrication of copper circuit patterns on glass substrates. The nanocrystal monolayers absorbed on hydrophobic surface templates serve as an effective photocatalyst, producing metallic…
We demonstrate a polarization-invariant liquid-crystal (LC) grating in an oppositely twisted and mutually orthogonal configuration. The polarization-invariant LC grating with high diffraction efficiency is fabricated using a single-masking process with two-step exposure of a linearly polarized ultraviolet light. It is…
Extended abstract of a paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4, 2005
Abstract Powder patterns of samples resulting from ferroelastic phase transitions generally show typical line profiles: asymmetry into the direction of the position of the corresponding hypothetical high symmetry reflection and strongly anisotropic line broadening. An approximate model is presented that describes the…
Because of the localized field amplification that occurs, excitation of surface plasmons (SPs) in metal nanoparticle-based current-carrying nanoelectronic devices is expected to lead to new and interesting applications. We report a simple way to prepare surface plasmon resonance (SPR)-mediated colloid Au monolayer jun…