Materials Literature
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Spin doctoring: The already high spin of S=51/2 of a Mn25 complex has been pushed even higher, by approximately 20 %, to S=61/2 by targeted substitution of the azide ligands with an N,O-chelating group. This significant adjustment, or tweaking, of the spin suggests the general possibility that a given type of complica…
Colloidal hollow nanoparticles (NPs) of Ni2P have been prepared by a one-pot reaction from a mixture of nickel acetate, oleylamine, trioctylphosphine (TOP), and 1-octadecene. The mechanism to the hollow structure is related to the nanoscale Kirkendall effect. The process contains two important steps. First, oleylamine…
Because the field of plastics is one of the fastest changing areas today, the need arises to offer relevant, comprehensive material on polymers. An established source of information on modern plastics, the Plastics Technology Handbook continues to provide up-to-date coverage on the properties, processing methods, and…
Self-healing is receiving an increasing amount of worldwide interest as a method to autonomously address damage in materials. The incorporation of a self-healing capability within fibre-reinforced polymers has been investigated by a number of workers previously. The use of functional repair components stored inside ho…
Nitrogen oxides (NOx) are the key air pollutants emitted by mobile and stationary sources, and are a major cause of adverse health and environmental effects. One promising alternative material to conventional noble metal-based catalysts for NOx emission control is the group of transition metal oxides, in particular, C…
peer reviewed
( 00 l ) epitaxial AgTaO3 and AgNbO3 thin films were prepared on (001)SrRuO3∕(001)LaAlO3 substrates by chemical solution deposition. The dielectric constants and loss of ∼300nm thick films were 110±10 and 0.025±0.005 for AgTaO3 and 550±55 and 0.020±0.005 for AgNbO3 at room temperature. In both films, the temperature c…
In this communication we present an estimation of the concentration of single substitutional nitrogen atoms (P1 centre) from EPR data in Kokchetav diamonds. We first performed an analysis of local P1 centre concentrations using van Wyks treatment (van Wyk <i>et al</i>., 1997) of the line width of the resol…
We applied x-ray absorption spectroscopy and x-ray magnetic circular dichroism (XMCD) at the Mn $2p\text{\ensuremath{-}}3d$ resonances to study the Mn $3d$ electronic configuration and the coupling of Mn $3d$ magnetic moments in various ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ films. The homogene…
Allanpringite is a new ferric iron phosphate with the ideal formula Fe3(PO4)2(OH)3·5H2O, and is closely related to wavellite, Al3(PO4)2(OH)3·5H2O. Type locality is the dump of the abandoned Grube Mark near Essershausen, ca. 5 km SE of Weilburg/Lahn, Taunus, Hesse, Germany. The mineral occurs as pale brown-yellow, 010]…
Rosemaryite, ideally NaMnFe 3+ Al(PO 4 ) 3 , has been collected in the Buranga pegmatite, Rwanda. A single-crystal structure refinement was performed to R 1 = 4.01 %, in the P2 1 /n space group, with a = 12.001(2), b = 12.396(1), c = 6.329(1) , = 114.48(1), Vol. = 856.9(2) 3 , Z = 4. The crystal structure and cation d…
We report on a comparative investigation of the structural and magnetic properties of three oxygen-bridged polynuclear ( N = 6, 8, 10) Cu(II) cyclomethylsiloxanolate complexes, Cu 6 [(MeSiO 2 ) 6 ] 2 ·6DMF ( 1 ), {Cu 8 [(MeSiO 2 ) 8 ] 2 ·8DMF}·EtOH ( 2 ) and {Cu 10 [(MeSiO 2 ) 10 ] 2 ·10DMF}·6DMF ( 3 ). All three mole…
Electron effective attenuation lengths (EALs) for SiO2 films on Si are reported that were obtained from Monte Carlo simulations of substrate Si 2p3∕2 photoelectron transport for x-ray photoelectron spectroscopy (XPS) with AlKα and MgKα x rays and SiO2 films of varying thicknesses. These EALs show a stronger dependence…
We show that the size of a lanthanide-ion doped nanoparticle can be accurately determined from its luminosity. The optically determined size distribution is in very good agreement with the distribution obtained from transmission electron microscopy. These data confirm that single nanoparticles are visualized in micros…
The synthesis, structure and magnetic properties of [Mn(13)O(8)(OEt)6(O(2)CC(6)H(4)OPh)12] are reported as the first example of a high nuclearity manganese complex with 2-phenoxybenzoate: the complex possesses S6 symmetry and an S = 11/2 ground state.
Abstract The application of lasers for processing diamond has revolutionized the diamond industry and its applications in microelectronics, microelectromechanical system (MEMS) and microoptoelectromechanical system (MOEMS) technologies. The process quality can be evaluated using spectroscopic techniques. In the presen…
Translational diffusion of fluorescent tracer molecules in azobenzene polymer layers is studied at different temperatures and under illumination using the method of fluorescence recovery after photobleaching. Diffusion is clearly observed in the dark above the glass transition temperature, while homogeneous illuminati…
Electron emission current degradation is often observed from printed single wall carbon nanotube emitters during field emission process. After a highly imposed emission, structural deformation of emitters from thin crystalline nanotube bundle to thick amorphous-type carbon fiber was observed. This deformation seems to…
Abstract The pressure–volume–temperature ( PVT ) dependencies of several amorphous polymers (PS, PC, PPE, and PPE/PS 1:1 blend) in the glassy and molten state were studied. The Simha–Somcynsky ( S –S) lattice‐hole equation of state (EOS) was used. Fitting the PVT data in the molten state to the EOS yielded the free vo…
In this work the effects of the wall-fluid interaction on the critical point shift are studied by using a discrete and attractive wall-fluid interaction and density functional theory. In contrast to the previous assumption, it is found that the dependence of critical temperature shift on the wall-fluid interaction doe…