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。
The reaction of low-spin [FeIICl(cyclam-ac)] with NO in CH3CN yields the octahedral, non-heme (nitrosyl)iron complex [Fe(NO)(cyclam-ac)](PF6) (2), S = 1/2, which can be one-electron oxidized with (tris(4-bromophenyl)ammoniumyl)hexachloroantimonate to the complex [Fe(NO)(cyclam-ac)](PF6)2 (1'), S = 0, or complex [Fe(NO…
Oriented liquid-crystalline network films with various cross-linking densities were prepared by polymerization of mixtures of mono- and diacrylates, both of which contain azobenzene chromophores. The optical anisotropy in the films was evaluated by polarizing optical microscopy and polarized IR spectroscopy. The dichr…
We examine the influence of surface and grain-boundary scattering on the total electrical resistivity of copper as dimensions are reduced close to the bulk electron mean free path (39 nm). Through resistivity and grain size characterization on copper wires with sizes down to 95×130 nm2 in a temperature range of 4.2 to…
Novel polyisobutylene-based thermoplastic elastomers are introduced as prospective implant materials for soft tissue replacement and reconstruction. In comparison, poly(ethylene terephthalate) (PET), poly(tetrafluoroethylene) (PTFE), polypropylene (PP), polyurethanes (PU), and silicones are outlined from well-establis…
Polar surface dominated ZnO nanopropeller arrays were synthesized by a two-step high temperature solid-vapor deposition process. The axis of the nanopropellers is a straight nanowire along the c axis and enclosed by {21̄1̄0} surfaces, which grew first; the sixfold symmetric nanoblades are later formed along the crysta…
We have investigated nitrogen doping effects on the structure and crystallinity of bamboo-shaped multiwalled carbon nanotubes (BS-MWNTs) by means of x-ray photoemission spectroscopy (XPS) and transmission electron microscopy. By controlling the NH3/C2H2 flow ratio during the chemical vapor deposition, the nitrogen con…
Environmentally friendly thermoplastic nanocomposites were successfully developed using a colloidal suspension of chitin whiskers as a filler to reinforce soy protein isolate (SPI) plastics. The chitin whiskers, having lengths of 500 +/- 50 nm and diameters of 50 +/- 10 nm on average, were prepared from commercial chi…
Hairy polymers from MWNTS: Surface-initiated polymerization (SIP) of methyl methacrylate (MMA) and styrene (S) has been performed from the surfaces of multiwalled carbon nanotubes (MWNTs) by using a covalently attached atom-transfer radical initiator. The initiator is grafted to the surface of the MWNTs through carbox…
Out of the blue: (CdS)ZnS nanocrystals suitable for display applications have been prepared and exhibit a narrow, blue luminescence from 460 to 480 nm (FWHM ≤28 nm; see picture), with quantum efficiencies of 20–30 %. It is possible to demonstrate blue electroluminescence from these core–shell nanocrystals by embedding…
We study both theoretically and experimentally the transmission properties of a lattice of split ring resonators (SRRs) for different electromagnetic (EM) field polarizations and propagation directions. We find unexpectedly that the incident electric field E couples to the magnetic resonance of the SRR when the EM wav…
The Ba3MgSi2O8:Eu2+, Mn2+ shows three emission colors: 442, 505, and 620 nm. The 442 and 505 nm emission originate from Eu2+ ions, while the 620 nm emission originates from Mn2+ ions. The excitation bands of three emission colors are positioned around 375 nm. Electron paramagnetic resonance measurement demonstrates th…
Abstract For Abstract see ChemInform Abstract in Full Text.
You have accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article Richards David and Zayats Anatoly 2004PrefacePhil. Trans. R. Soc. A.362699–700http://doi.org/10.1098/rsta.2003.1366SectionYou have accessPreface David Richards D…
Abstract For Abstract see ChemInform Abstract in Full Text.
The Lemlich law provides a simple estimate of the relative conductivity of a three-dimensional foam, as one third of its liquid fraction. This is based on an expression for the conductivity of a network of uniform wires (conducting lines). We show this to be an exact upper bound for the conductivity, orientationally a…
We report first-principles density-functional calculations of the electronic structure of ${\mathrm{YFe}}_{2}$ and ${\mathrm{YFe}}_{2}{\mathrm{H}}_{4}.$ The electronic structure is strongly affected both by band narrowing associated with the lattice expansion upon hydriding and the changes in band filling and covalenc…
UPF0040 is a family of proteins implicated in a cellular function of bacteria cell division. There is no structure information available on protein of this family. We have determined the crystal structure of a protein from Mycoplasma pneumoniae that belongs to this family using X-ray crystallography. Structural homolo…
Dramatic fluorescence bursts (see Figure and cover) from conjugated polymers are observed upon exposure to air. The burst occurs prior to photo‐oxidation and is imaged in single molecules of a ladder‐type polymer, but is also found in bulk films. Triplet shelving is identified as an important mechanism limiting the fl…
Abstract The structure–property relationship of sugarcane bagasse fiber‐filled polyamide 6 blends at different blend compositions has been investigated. Blends were prepared in the composition of wt % PA6/wt % bagasse as follows: 98/2, 95/5, and 90/10 for three fiber length ranges (<100, <250, and <500 μm) us…
Abstract Small‐angle neutron scattering (SANS) and light scattering studies were carried out on an organogel consisting of a gelator, coded P‐1, and dimethyl sulfoxide (DMSO). The gelator was made of an oligosiloxane stem and about eight branches of an amino acid derivative combined with a long alkyl chain. The amino…