Materials Literature
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Three novel heteropolyanions [PMo(12)Sb(2)O(40)][Cu(enMe)(2)].4H(2)O (), [PMo(12)Sb(2)O(40)][Ni(enMe)(2)].4H(2)O (2) and [PMo(12)Sb(2)O(40)][Cu(en)(2)].H(3)O.H(2)O (3) (enMe = 1,2-diaminopropane, en = ethylene diamine) have been synthesized and characterized by IR spectroscopy, X-ray photoelectron spectroscopy (XPS),…
Polycrystalline BiFeO 3 –PbTiO 3 (BF–PT) powders with mixed tetragonal and rhombohedral crystal structure (morphotropic phase boundary: MPB) were modified with lanthanum to provide a wide variation in tetragonal distortion. X-ray diffraction from both the powder and the corresponding bulk ceramic demonstrated that the…
Large-scale CeO 2 spherical architectures composed of numerous nanoflakes have been controllably prepared through a simple hydrothermal reaction without any template. The products were characterized with X-ray diffraction, nitrogen adsorption−desorption experiments, transmission electron microscopy (TEM), and high-res…
A homologous series of interhydrogen bonded complexes between p-n-alkoxybenzoic acids (nABA) and alkyl anilines were isolated. The mesogenic nABA (where n represents the alkoxy carbon number from 5 to 12 except 6) formed a hydrogen bond with liquid crystal intermediate 4-hexyl aniline. The homologous series mesogens a…
A density functional theory study of the decomposition of methanol on subnanometer palladium clusters (primarily Pd 4 ) is presented. Methanol dehydrogenation through C−H bond breaking to form hydroxymethyl (CH 2 OH) as the initial step, followed by steps involving formation of hydroxymethylene (CHOH), formyl (CHO), a…
We investigate properties of nonlinear resonant gratings with emphasis on optical bistability. Slab waveguide gratings with various quality factors are designed and their characteristics analyzed with a finite-difference time-domain method. Considerable field enhancements are observed in the gratings and the performan…
The thermal quenching of fluorescence of Ce:Y 3 Al 5 O 12 glass-ceramic (YAG-GC) phosphor was evaluated and compared with those of Ce:Y 3 Al 5 O 12 polycrystal (YAG-PC) and Ce:(Gd,Y) 3 Al 5 O 12 glass-ceramic (GdYAG-GC). The fluorescence intensity of YAG-GC showed a lower temperature dependence than that of GdYAG-GC,…
Abstract The effects of crystallinity and temperature on enzymatic degradation of poly‐ε‐caprolactone (PCL) films and structural changes after degradation have been studied using weight loss, differential scanning calorimetry, and optical microscopy. The weight loss during the enzymatic degradation of PCL suggested th…
We present a low-cost bonding method for polymethylmethacrylate (PMMA) microfluidics that combines elements of solvent bonding, thermal bonding and microwave bonding. Rather than using specialized equipment, we take household equipment and combine it to produce an effective bonding method that borrows from food packag…
Recently synthesized copper octacyanomolybdate molecules present interesting photomagnetic properties. Before irradiation, the molecules behave as noncoupled Cu II paramagnetic ions (with central diamagnetic Mo IV ion), whereas after irradiation (406 nm) they behave as superparamagnetic molecules with Cu II ions coupl…
Consideration of temperature and anisotropy effects in hysteresis modelling allows for tailoring the operation point of magnetic circuits. The recently modified Jiles–Atherton model has been extended to describe the hysteresis loops in MnZn ferrites for two temperatures below the Curie point. Anisotropy is modelled by…
Influence of p-type and n-type dopants on the magnetic properties of ZnCuO based diluted magnetic semiconductor thin films, Zhang, L Q, Ye, Z Z, Lu, J G, Lu, B, Zhang, Y Z, Zhu, L P, Zhang, J, Yang, D, Wu, K W, Huang, J, Xie, Z
Freestanding, thin, and bendable electrodes for supercapacitors are fabricated by filtering DNA-dispersed double walled carbon nanotubes (DWNTs) into a thin film and thermally treating the film in argon. We found that DNA has the ability to disperse the strongly bundled DWNTs and is converted to phosphorus-enriched ca…
p -ZnO / i -CdZnO / n -ZnO was grown on n-type Si substrates by plasma-assisted molecular-beam epitaxy. Rectifying I-V curves show typical diode characteristics. Blue electroluminescence emissions at around 459 nm were observed when the diodes were forward-biased at room temperature. The emission intensity increases w…
Biporous carbon-silica materials (CSM) with molecular sieve properties and high sorption capacity were developed by synthesizing nano-sized carbon crystallites in the mesopores of Al-MCM-41.
We use the magneto-optical Kerr measurement at room temperature to demonstrate an electric-field controlled switching of the local magnetization vector in a very simple multiferroic bilayer made up of an amorphous FeBSiC magnetic layer bonded on a Pb(Zr,Ti)O 3 slab. By applying an electric field on this simple bilayer…
Thin films of block copolymer−surfactant complexes which consist of polystyrene- b -poly(ethylene oxide) (PS- b -PEO) with dodecylbenzenesulfonic acid (DBSA) hydrogen-bonded to the ether group in PEO blocks, are investigated and characterized by FT-IR, DSC, AFM, TEM, GISAXS, and GIWAXD. The films are solvent-annealed…
In the present work, the formation and stabilization of gold nanoparticles in a one-pot water-based synthesis has been achieved in the presence of a four-arm, star-shaped polyoxyethyelene-polyoxypropylene (PEO-PPO) block copolymer, Tetronic T904, which acts as both reductant and stabilizer. The influence of several pa…
Single-crystalline MoO 3 nanobelts were prepared on a wide variety of substrates by a simple evaporation and deposition process using a thermal hot plate. This cost-effective technique has the potential for large-scale production of MoO 3 nanobelts with a unique layered structure. The MoO 3 nanobelts dispersed on sili…
Multiwall carbon nanotubes (MWNTs) are promising candidates for yielding next generation electrical and electronic devices such as interconnects and tips for conductive force microscopy. One of the main challenges in MWNT implementation in such devices is the high contact resistance of the MWNT-metal electrode interfa…