Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTMeasuring Macrodiffusion Coefficients in Microbicide Hydrogels via Postphotoactivation ScanningAnthony R. Geonnotti*†, Matthew J. Furlow†, Tianshi Wu†, Michael G. DeSoto†, Marcus H. Henderson†, Patrick F. Kiser‡, and David F. Katz†§View Author Information Department of Biomedic…
Using electronic structure methods and statistical methods, we have studied theoretically the volume dependence of the exchange interactions and Curie temperatures in the diluted magnetic semiconductors. In both Mn-doped GaAs and Mn-doped InAs, the calculated Curie temperatures from numerical exact Monte Carlo simulat…
We theoretically explore the possibility of a superconducting proximity effect in single-walled metallic carbon nanotubes due to the presence of a superconducting substrate. An unconventional double-gap situation can arise in the two bands for nanotubes of large radius wherein the tunneling is (almost) symmetric in th…
Many ancient Chinese bronze mirrors have survived with a patina that leaves the delicate surface decorations intact. The microstructure of these mirrors is two-phase: Cu-rich α and Sn-rich δ. Although the mirrors have been labeled ‘corrosion-resistant’, the smooth surface includes a corroded layer up to 100 µm thick.…
A methanol extract of the dried bark of Liriosma ovata afforded two new isoprenoid glycosides, a eudesmane sesquiterpene, 1alpha(beta- d-glucopyranosyloxy)eudesma-3alpha,4beta, 11-triol ( 1), and a C 13-norisoprenoid, 3alpha,6alpha-dihydroxymegastigman-7-en-9-one 3- O-beta- d-apiofuranosyl-(1-->6)-beta- d-glucopyranos…
Magnetoelectric polycrystals usually possess antiferromagnetic domains with oppositive magnetoelectric coefficients, and have to be annealed under the appropriate electric and magnetic fields to make the polycrystals macroscopically magnetoelectric. In this paper, we developed an effective medium approximation to calc…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSegmented Polyimides with Poly(ethylene oxide) Blocks Exhibiting Liquid CrystallinityG. Costa, G. C. Eastmond, J. P. A. Fairclough, J. Paprotny, A. J. Ryan, and P. StagnaroView Author Information Institute for Macromolecular Studies, ISMAC−CNR, Via De Marini 6, 16149 Genova, It…
Our aim was to develop novel scaffolds to engineer tissue tubes of smooth muscle-like cells for autologous grafting. Small diameter tubular poly(lactic acid) scaffolds with randomly distributed, interconnected pores up to 100 mum were produced using a thermally induced phase separation method. The scaffolds were surfa…
A series of shock-recovery experiments on a single crystal of silicon up to 38 GPa and characterizations of the recovered samples by x-ray diffraction analysis, Raman spectroscopy, and microscopic observations were performed for a better understanding of residual effects after shock loading by using a propellant gun.…
We discuss the use of rate equations to analyze the sensitization of erbium luminescence by silicon nanoclusters. In applying the general form of second-order coupled rate-equations to the Si nanocluster-erbium system, we find that the photoluminescence dynamics cannot be described using a simple rate equation model.…
The electronic structure of the organic semiconductor copper-phthalocyanine (CuPc) has been determined by a combination of conventional and resonant photoemission, near-edge x-ray absorption, as well as by the first-principles calculations. The experimentally obtained electronic valence band structure of CuPc is in ve…
High-${T}_{C}$ superconductivity is possible upon metallic-element doping into $\ensuremath{\beta}$-rhombohedral boron $(\ensuremath{\beta}\text{\ensuremath{-}}{\mathrm{B}}_{105})$, which is one of the boron icosahedral cluster solids. We attempted magnesium (Mg) doping into $\ensuremath{\beta}\text{\ensuremath{-}}{\m…
Understanding energy transfer among hydroporphyrins is of fundamental interest and essential for a wide variety of photochemical applications. Toward this goal, a synthetic free base ethynylphenylchlorin has been coupled with a synthetic free base bromobacteriochlorin to give a phenylethyne-linked chlorin-bacteriochlo…
The coupling among the spin degree of freedom and the atomic displacements in intermetallic $\mathrm{Gd}{\mathrm{Al}}_{3}$ was investigated by means of synchrotron x-ray diffraction and polarized Raman scattering. In this compound, the $\mathrm{Gd}\phantom{\rule{0.2em}{0ex}}4{f}^{7}$ shell is spherical and the spin-la…
Anisotropic Nd–Fe–B thin films are fabricated by direct current magnetron sputtering on Si substrates heated to temperatures over a wide range. Surface morphology and magnetic domains of the Nd–Fe–B thin films prepared at different sputtering temperatures (25–600 °C) are observed by a scanning probe microscopy. The ma…
Abstract Benzoyl peroxide was used as a novel oxidizing agent in the preparation of a polyaniline (PANI) dispersion. Aniline was oxidized by benzoyl peroxide into a PANI dispersion in the presence of poly(vinyl pyrrolidone) (PVP) as a stabilizer. A pure PANI dispersion in water was prepared by the dispersion of the is…
Zero valent Cu polyamidoamine (PAMAM) dendrimer nanocomposites were synthesized using UV irradiation starting from the aqueous Cu(II)/dendrimer system. The size of the nanoparticles is strongly dependent on the generation of the dendrimers and the pH of the solution. Larger nanoparticles are obtained with higher gener…
Natural cellulose fibres have been employed for packaging applications for a long time. Their use, however, has been hampered by their high hydrophilicity and their moisture sensitivity. It has, thus, been proposed to circumvent this problem through the hydrophobic modification of their surface thanks to the use of mo…
Photoluminescence (PL) and optically detected magnetic resonance are employed to study effects of nonstoichiometry during the growth on defect formation in ZnO epilayers grown by molecular-beam epitaxy (MBE). Several defects are revealed via monitoring the yellow PL emission (∼2.17eV) and their magnetic resonance sign…
We investigated the blue luminescent silicon nanocrystal (Si-nc) preparation in liquid spin on glass (SOG) by nanosecond laser ablation of the Si target in SOG. The confinement of laser-generated plasma in liquids significantly enhanced the formation of Si-nc. Furthermore, the silicon-dioxide-based SOG inhibited Si-nc…