Materials Literature
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Abstract New hydrosoluble magnetic resonance imaging (MRI) macrocontrast agents are synthesized by reversible addition fragmentation chain transfer (RAFT) copolymerization of poly(ethylene oxide) methyl ether acrylate (PEOMA) with an acrylamide bearing a ligand for gadolinium, followed by the complexation of Gd 3+ . T…
A family of liquid-crystalline polymers (LCPs) containing a block mesogenic side group was synthesized by varying the hydrophilic moiety (oligooxyethylene) ratio. As the oligooxyethylene content increased, the range of the LC phase narrowed or vanished. The polymers were subjected to annealing and exposed on the surfa…
The thermoelectric properties of the fluorite‐related oxide, In 4 Sn 3 O 12 , have been investigated by studying the system In 4− x Ga x Sn 3 O 12 , with 0 ≤ x ≤ 0.15. It has been shown that Ga does not enter the In 4 Sn 3 O 12 matrix, and two secondary phases form via the Ga introduction: SnO 2 and Ga 2 In 6 Sn 2 O 1…
다양한 억제제의 농도, 온도, 유속에서 중량 분석과 변전위 분극법을 이용하여 0.25 M 황산 용액상에 있는 연강철에 대한 imatinib mesylate (IMT)의 부식 억제를 연구하였다. 억제제의 농도가 증가함에 따라 억제 효과가 증가한다는 결과를 얻었다. 연강철 표면 위의 흡착 과정은 Langmuir 흡착 등온선을 따른다. 얻어진 흡착 깁스 자유 에너지의 값은 연강철 위의 IMT의 흡착 과정이 화학흡착이라는 것을 보여준다. 열역학 변수들이 계산되고, 논의되었다. IMT의 HOMO와 LUMO의 전자궤도 밀도 분포는 억제 메커니즘을 논의하는데 이용되었다. FT-…
This work reports the study of silver ion dynamics in Ag 2 S-doped silver molybdate–glass nanocomposites of compositions x Ag 2 S–(1 – x )( y Ag 2 O–(1 – y )MoO 3 ). The volume fraction of crystalline phases in these glass nanocomposites increases with the increase of Ag 2 S content and considerably influences the dc…
Several kinds of bent-shaped molecules with different lengths of the terminal chain are doped in chiral nematic liquid crystals (LCs), respectively, to induce the blue phase. The effects of the terminal chain length on the blue phase range are studied. The mechanisms of the phenomena are investigated through molecular…
Defects in low-k organosilicate glass produced during air and nitrogen plasma exposure were investigated. The defects, through the measurements of electron-spin resonance and Fourier-transform infrared spectroscopy, were found to be silicon-dangling bonds. Air-plasma exposure increases the defect concentrations by bre…
Abstract In the present work the influence of the amount and size distribution of blowing agent particles (magnesium hydride, MgH 2 ) on the resulting pore structure of aluminum foams is studied. A modified die casting process called integral foam moulding (IFM) is used where aluminum melt mixed with blowing agent is…
Abstract Sea urchin spines combine extreme lightweight construction with impact resistance and improved mechanical strength although being made of presumably brittle calcium carbonate (calcite). Lance and pencil sea urchins (Phyllacanthus imperialis and Heterocentrotus mammillatus) are of particular interest as they e…
AIMS: Polyhydroxyalkanoate (PHA) with enhanced physicochemical properties will be ideal for a wide range of practical applications. The incorporation of 3-hydroxy-4-methylvalerate (3H4MV) into the polymer backbone is known to improve the overall properties of the resulting polymer. However, the most suitable micro-org…
Seeing double: The synthesis of hydrogen peroxide, an environmentally benign oxidizing agent, from methane in a plasma reactor is investigated. The selectivity of the methane oxidation can be shifted away from H2O and COx towards high yields of H2O2 and organic oxygenates by changing the structure of plasma reactor, f…
It is well known that two regular tetrahedra can be combined with a single regular octahedron to tile (complete fill) three-dimensional Euclidean space . This structure was called the "octet truss" by Buckminster Fuller. It was believed that such a tiling, which is the Delaunay tessellation of the face-centered cubic…
A path-folded infrared image spectrometer with five sub-gratings and five linear-array detectors was applied to a broadband optical monitoring (BOM) system for thin film deposition. Through in situ BOM, we can simultaneously acquire the thickness and refractive index of each layer in real time by fitting the measured…
In this paper, we report for the first time the synthesis, growth and characterization of a new organic NLO single crystal of 4 choloro-4-methyl benzylidene aniline. The title compound is synthesized and single crystals were grown by the slow evaporation technique at constant temperature. The grown single crystals hav…
We present the synthesis and structural characterization, assessed by various techniques (FTIR, TGA, UV-vis, elemental analysis, single-crystal X-ray diffraction for three compounds, magnetic susceptibility, and electrochemistry) of five manganese-containing Wells-Dawson sandwich-type (WDST) complexes. The dimanganese…
In this work, we report on the temperature‐dependent crystal structures of the isostructural, layered hexagonal phases Ti 2 AlN and Cr 2 GeC determined by Rietveld analysis of high temperature neutron powder diffraction data of fully dense, polycrystalline, bulk samples in the 100° to 1100°C temperature range. For bot…
We report a highly sensitive surface-enhanced Raman scattering (SERS) platform for the selective trace analysis of mercury (II) ions in drinkable water using aptamer-conjugated silver nanoparticles. Here, an aptamer designed to specifically bind to <TEX>$Hg^{2+}$</TEX> ions in aqueous solution was labelled with a TAMR…
Bulk 0.7 PbZr 0.52 Ti 0.48 O 3 –0.3NiFe 2 O 4 nanoceramic composites with a grain size of ~50 nm were fabricated using chemical synthesis, high‐energy ball‐milling, and spark plasma sintering. The composite produced broad dielectric constant peaks and frequency dispersion, similar to relaxor ferroelectrics, and was fe…
To determine how effectively transition metal nanoparticles can couple with a noble metal substrate to induce higher electromagnetic fields, we examined the surface-enhanced Raman scattering (SERS) characteristics of 4-aminobenzenethiol (4-ABT) positioned in the gaps formed by a flat Ag substrate and 20–150 nm Pt nano…
A drastic improvement in oxidation resistance of SmCo7 nanocrystalline magnet was achieved by alloying silicon at 500 °C. The maximum energy product (BH)max loss of SmCo6.1Si0.9 nanocrystalline magnet was about 5.6% after oxidation at 500 °C for 500 h, which was significantly less than 52.1% of SmCo7 nanocrystalline m…