Materials Literature
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Abstract The FT‐IR and FT‐Raman spectra of anilinium sulfate were recorded and analyzed. The surface‐enhanced Raman scattering (SERS) was recorded from a silver electrode. The vibrational wavenumbers of the compound have been computed using the Hartree‐Fock/6‐31G* basis and compared with the experimental values. The m…
The in vitro hydrolytic degradation of irradiated biodegradable polymers was studied. Poly(L-lactide), poly(lactide-co-glycolic acid) (PLGA)(80:20), and PLGA(50:50) polymers were first electron beam irradiated at 5 Mrad before hydrolytic degradation. Hydrolysis of these films was characterized through their physical p…
A solution based hydrothermal method is used for the preparation of LaPO4:Yb–Tm doped and LaPO4:Yb/Tm core-shell upconverted nanorods. The morphologies, structure, formation mechanism, and upconversion emission properties of these nanocrystals are investigated in detail. Tensile strain is observed for LaPO4:Yb–Tm dope…
Abstract The authors have published several papers on the rotating disk apparatus (RDA) in recent years. The RDA is used to measure acid reaction rates, reaction order and activation energy of acidizing fluids with carbonate reservoir rock. This paper summarizes the different ways that acid reaction rates are measured…
We investigated the relationships between fluctuations in environmental factors and blooms of the diatom Stephanodiscus hantzschii by bi-weekly monitoring from February 2001 to February 2002 and from February 2004 to February 2005, in the eutrophic lower Han River (LHR), South Korea. With the exception of the summer r…
Abstract Smooth and micro/nano‐structured fluorocarbon coatings are obtained by radio frequency (RF), 13.56 MHz, glow discharges fed with hexafluoropropylene oxide (C 3 F 6 O, HFPO) both in glow and in afterglow. It is shown that the extent of micro/nanostructuring, as well as the F/C ratio of the coatings, can be pre…
To demonstrate that barium titanate‐based ceramics could be sintered at a low temperature thus reducing the cost of capacitor production, systematic investigation has been made on the structure and dielectric properties of barium titanate‐based X8R ceramics, doped with various Nd 2 O 3 content and different ZnO–B 2 O…
A peptide-amphiphile (C12-Abeta(11-17)) was constructed with a key fragment of amyloid beta-peptide (Abeta(11-17)) attached to dodecanoic acid through an amide bond. The self-assembly behavior of C12-Abeta(11-17) in aqueous solution is studied at 25 degrees C and at pH 3.0 and 10.0. Abeta(11-17) cannot form ordered se…
The effect of 1 at.% N addition on the shape memory effect of Ti – Nb alloys was investigated. The shape memory effect and superelasticity were observed in Ti –(18–20) Nb –1.0 N and Ti –(21–25) Nb –1.0 N alloys, respectively. The Ti –23 Nb –1.0 N alloy exhibits the best superelastic properties with almost perfect reco…
Plasma species that form plasma polymer deposits readily penetrate through small openings and are therefore well suited to coat the interior of porous objects. Here, we show how the size of the cross section of square channels influences the penetration of active species from a hexane plasma and how it affects the for…
AIM: The piezoelectric properties and cytotoxicity of a porous lead-free piezoelectric ceramic for use as a direct bone substitute were investigated. METHODOLOGY: Cold isostatic pressing (CIP) was applied to fabricate porous lithium sodium potassium niobate (Li0.06Na0.5K0.44) NbO3 specimens using a pore-forming method…
Polymer insulating materials installed in electrical and electronic devices are widely used in spacecraft and nuclear power stations where the polymers are exposed to energetic radioactive rays. The chemical structure can be changed by radiation induced reactions that possibly gives rise to the alteration of character…
This paper discusses the necessity and ways of replacing batteries in BSNs and other wearable devices with energy scavengers. The stresses are made on thermoelectric energy converters of human body heat into electrical power and on rules of their designing. The reasons for and possible ways of hybridizing wearable the…
A facile hydrothermal route was adopted for synthesis of lead‐free piezoceramics (K, Na)NbO 3 powders. The influences of temperature and KOH/NaOH concentration on the resultant powders were investigated. Although two similar perovskite phases appeared when K/Na ratio tended toward 1:1, the two‐phase coexistence tenden…
Raman and IR spectroscopies, X-ray diffraction and chemical analysis have been used to characterize synthetic compounds of the alunite supergroup of formula AB3(SO4)2(OH)6, with A = Na+, K+, H3O+ and B = Al, Cr3+, Fe3+, V3+. For each A-site cation, the proportion of B-site vacancies decreases in the same order as the…
We surveyed a panel of 13 metal nanoparticle (NP) catalysts for their antifungal activities against Candida albicans ATCC 90028. Initial characterization using scanning electron microscopy (SEM) suggested that our ability to detect NP binding to Candida surfaces with this method was impeded by preparation artifacts. A…
A study of the recovery of the hydrophobicity of high temperature vulcanized (HTV) silicone rubber (SIR) after immersion for 3000 h in saline solutions of different conductivities (0.005-100 mS/cm) and at different temperatures (0-98 °C) as a function of time (0 to 3000 h) is reported. The hydrophobicity characterized…
A limiting mean free path was considered in order to better understand the temperature and wire diameter dependence of the resistivity and Seebeck coefficient of bismuth microwire and nanowire samples. The mean free path limited mobility was numerically calculated from experimentally measured mobility in a bulk bismut…
We report the ferromagnetism of La0.67Ca0.33MnO3 in bulk polycrystalline, nanocrystalline, and amorphous phases. The structural change from crystalline phase to amorphous phase exhibited a systematic decrease in TC (paramagnetic to ferromagnetic transition temperature) and spontaneous magnetization (MS). The experimen…
Data pertaining to the mechanical properties of the fuel cladding in the hoop direction are required for the analysis of high burn-up fuel behavior under reactivity-initiated accident (RIA) conditions. In the present study, by minimizing undesirable effects of friction and bending, the ring tensile test method was opt…