Materials Literature
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The atomic mechanism of liquid-glass transition for Ca(7)Mg(3) alloy during the rapid quenching processes is studied by the molecular dynamics simulations. The temperature dependences of structural, thermodynamic, and dynamic properties during the liquid-glass transition have been investigated. It is found that onset…
Low temperature specific heat has been measured in optimally doped and highly overdoped nonsuperconducting Ba(Fe${}_{1\ensuremath{-}x}$${\mathit{TM}}_{x}$)${}_{2}$As${}_{2}$ ($\mathit{TM}$ $=$ Co and Ni) single crystals. By using the data of the overdoped samples, we successfully removed the phonon contribution of the…
The minerals belonging to the tobermorite group differ essentially by their basal spacing (approximately 14, 11, and 9 Å), related to their water content; additionally, the phases with an 11 Å periodicity differ in their behaviour upon heating, which can be "normal" if they collapse to form a 9 Å phase or "anomalou…
Quantitative analysis of Cu(In,Ga)Se2 thin films by secondary ion mass spectrometry using a total number counting method, Jang, Jong Shik, Hwang, Hye Hyen, Kang, Hee Jae, Suh, Jung Ki, Min, Hyung Sik, Han, Myung Sub, Cho, Kyung Haeng, Chung, Yong-Duck, Cho, Dae-Hyung, Kim, Jeha, Kim, Kyung Joong
To obtain the accurate magnetic properties of Nd-Fe-B sintered magnets with high coercivity (HcJ), we have compared a pulsed-field magnetometer (PF) method with a hysteresis graph (HG) method using an extra large-sized electromagnet. To prevent the effects of machining on magnetic properties in small samples when maki…
Abstract Structural and optical properties of Ba 1− x Eu x Si 2 S 5 are investigated for 0 ⩽ x ⩽ 1. A monoclinic structure similar to SrSi 2 S 5 is maintained for the whole range of x . With the increase in x , continuous and isotropic decrease of lattice constants appears because of the replacement of Ba 2+ by smalle…
Abstract Magnetic nanoparticles (NP) have found various important applications in nanotechnology and nanomedicine, because they can be manipulated by external magnetic field and can be functionalized on their surface. Although a variety of magnetic core shell NP are known present research focuses on new NP with better…
The incommensurate stripelike magnetic ordering in two single-layered manganites, Nd0.33Sr1.67MnO4 and Pr0.33Ca1.67MnO4, is found to exhibit an hourglasslike excitation spectrum very similar to that seen in various cuprates superconductors, but only for sufficiently short correlation lengths. Several characteristic fe…
Bringing it all together: Synthesis of a dimeric micelle (see scheme) is shown to produce specifically linked Janus-like micelles. The reaction conditions for dimeric micelle formation were optimized and the resulting micelles characterized. Trimeric, tetrameric, and multimeric micelles were also synthesized using the…
We demonstrate a high-power UV 278 nm laser by fourth-harmonic generation (FHG) of a 1112 nm Nd:YAG laser in a nonlinear optical (NLO) crystal CsB3O5 (CBO) for the first time, to our best knowledge. A 30 W level diode-pumped Q-switched Nd:YAG laser at 1112 nm with beam quality factor M2=1.2 was used as the fundamental…
A method for synthesizing highly strained cyclic structures by combining photochromic and synthetic reactions is described. Tightly linked azobenzene-binaphthyl dyads (R)-4 and (R)-6 could not be obtained by conventional cyclization, but continuous application of photoirradiation, which induced (E)→(Z) isomerization o…
Design, synthesis and electropolymerization of a new hybrid material based on terthienyl system bearing BODIPY appendage are reported. This electrochemically polymerized unique combination readily gives an electrochromic polymer with a narrow optical band gap (1.71 eV). The electrochrome exhibits purple color when neu…
Selected thermophysical properties are reported for VX ( O -ethyl- S -[2(diisopropylamino)ethyl] methylphosphonothiolate) and its isomer, RVX ( O -isobutyl- S -[2(diethylamino)ethyl] methylphosphonothiolate). Several properties have been reported previously for both compounds; the focus of the current work has been th…
The biosynthesis of gold nanoparticles using catclaw buttercup (Radix Ranunculi Ternati) and their stability have been reported in this paper. The aqueous catclaw buttercup was used as mild reducing agent for gold nanoparticles synthesis from HAuCl4 solutions. The influence of reaction time, temperature and mass ratio…
Surface dynamics is sometimes used to determine the rheological properties of soft materials. In typical data analyses, surface capillary waves are included without incorporating thermal noise. A phenomenological expression for the time-dependent power spectral density has been proposed to account for thermal noise an…
Abstract In this study, thiol–ene photocurable highly hydrophobic and oleophobic coatings were prepared and characterized. Trimethylolpropane tris(3‐mercaptopropionate) and triallyl 1,3,5‐triazine‐2,4,6(1H,3H,5H)‐trione were used for the preparation of the base formulation. Highly hydrophobic and oleophobic coatings w…
Neste trabalho foram desenvolvidos biocompósitos baseados em acetato de celulose e fibras curtas de Curauá tratadas com dióxido de carbono supercrítico. O tratamento das fibras resultou na extração parcial de lignina, sendo este um método interessante pois não resulta em rejeitos químicos. Duas séries de biocompósitos…
Sorption and desorption isotherms of four gelatin powder from different sources (Bovine B-225, Pig skin A-270, Fish FG-260 and Poultry PG-240) were determined at 25°C by using the DVS machine at wide relative humidity range (0% to 90%). Data were fitted with the GAB and Peleg models. The isotherms showed the character…
We carry out a molecular dynamics simulation of the first stages of constrained melting in crystalline polyethylene (PE). When heated, the crystal undergoes two structural phase transitions: from the orthorhombic (O) phase to the monoclinic (M) phase, and then to the columnar (C), quasi-hexagonal, phase. The M phase r…
The glass cooling rate during forming process has significant effect on the crystallization behavior and structural uniformity of Li2O-Al2O3-SiO2 (LAS) glass-ceramics. Finite element analysis indicated that the cooling rate of 10 mm thick glass was notably lower than that of 2 mm thick glass. The central temperature o…