Materials Literature
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The electrical conductivity of nanoporous gold was measured in situ during the charging and decharging of the surface of the metal. The nanoporous gold samples were prepared by the process of selective dealloying of Ag from Au–Ag alloy. Charge was induced on the surface by making the sample a working electrode in an e…
Luminescence color multiplexing is one of the most intriguing benefits, which might occur by using semiconductor Quantum Dots (QDs) as labels for biomolecules. It was found, that the luminescence of QDs can be quenched, and replaced by a luminescence peak at approximately 460 nm on hybridization with certain regions o…
Frequency characteristics and their dependence on charge voltage for a packed electric double layer capacitor (EDLC), which consists of a series of connected EDLC cells, are characterized and modeled based on small ac signal analysis. The results indicate that rated capacitance of a packed EDLC is valid only at freque…
The mechanical threshold stress plasticity model of Follansbee and Kocks was designed to predict the flow stress of metals and alloys in the regime where thermally activated mechanisms are dominant and high temperature diffusion effects are negligible.In this paper we present a model that extends the original mechanic…
Response surface methodology (RSM) was used to obtain a more systematic understanding of the electrospinning conditions of polyamide 6 solutions. This method was used to establish a quantitative basis for the relationships between the electrospinning parameters such as applied electric field, the polymer concentration…
Pyrolyses of chemical precursor systems composed of zirconium or hafnium powders dispersed into blends of the polymethylcarbosilane and poly(norbornenyldecaborane) preceramic polymers provide simple efficient routes to new types of ZrB 2 /ZrC/SiC and HfB 2 /HfC/SiC composites. Further extensions of this method should…
The results of investigation of the complex permittivity and permeability of polymer composite materials with different magnetic fillers in the frequency range of 1 MHz to 10 GHz are presented. The possibility of controlling the frequency characteristics of permeability and permittivity and the absolute values of thes…
The structural environment of substitutional Cr 3+ ion in a natural pyrope Mg 3 Al 2 Si 3 O 12 has been investigated by Cr K-edge extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) coupled with first-principles computations. The Cr-O distance is close to that in knorringi…
Since the discovery of vulcanisation, rubber has become an indispensable material for the technological development of civilisation, starting from a simple balloon to complex rocket propellant. Rubber Industry worldwide is using on an average 50% of raw materials. These materials are mostly petroleum-based, except nat…
A novel ldquoshunt attachrdquo configuration for chip-scale thermoelectric (TE) generation of electric power from microprocessor waste heat is described, modeled, and parametrically analyzed. The generated electricity is used to drive a cooling fan that convectively cools the chip. A prototype using heat-driven coolin…
Aluminum oxide nanopowders are prepared by the gas phase method and characterized according to the particle sizes and the phase composition. Samples of the nanostructured ceramic material are produced by pressing and annealing in air. The photoluminescence and cathodoluminescence spectra of the Al 2 O 3 nanostructured…
Abstract The influences of inorganic phosphates, as residuals and/or impurities within starch, on the adhesion of acid‐treated cornstarch phosphates to cotton and polyester fibers were investigated for warp sizing. The phosphate impurities considered included sodium dihydrogenphosphate, sodium hydrogenphosphate, sodiu…
HYPOTHESIS: The immunodeficient (severe combined immunodeficiency beige [SCID/bg]) mouse model provides a useful model for investigating vascular neotissue formation in human tissue-engineered arterial conduits (TEAC). DESIGN: Human aortic smooth muscle cells and endothelial cells were statically seeded on porous biod…
The determination of enzyme activities and the screening of enzyme regulators is a major task in clinical chemistry and the development of new drugs. A broad variety of enzymatic reactions is associated with the consumption or formation of small molecules like H(2)O(2), ATP, pyrophosphate, or phosphate. Luminescent la…
Knoop indenters were prepared from nanopolycrystalline diamonds (NPDs) synthesized by direct conversion sintering from graphite under high pressure and high temperature. Owing to the fine structure (grain size: 10-100 nm) of NPD, high-accuracy sharp edges could be formed at the indenter tips. The indentation tests dem…
The perovskites Sr 2 MnRuO 6 and LaSrMnRuO 6 have been investigated and their properties compared with those of the broader family of A 2 MRuO 6 double perovskites (A=Sr, La; M=Cr, Mn, Fe, Co, Ni). Neutron powder diffraction shows that both phases lack long‐range Mn/Ru order. Sr 2 MnRuO 6 exhibits a cooperative Jahn–T…
The oxidation of MnII carboxylates by (NBu4)Cr2O7 in the presence of different phosphonic acids and chelating ligands results in six CrIII-doped tetranuclear manganese clusters formulated [Mn3CrO2(O2CCH3)4(O3PC5H4N)2(bpy)2] (1), [Mn3CrO2(O2CCH3)4(O3PC5H4N)2(phen)2] (2), [Mn3CrO2(O2CPh)4(O3PC5H4NO)2(phen)2] (3), [Mn3Cr…
Large Microwave Birefringence Liquid-Crystal Characterization for Phase-Shifter Applications, Dubois, Frédéric, Krasinski, Freddy, Splingart, Bertrand, Tentillier, Nicolas, Legrand, Christian, Spadlo, Anna, Dabrowski, Roman
Magnetic, magneto-thermal and magneto-transport properties investigated in R(2)Al compounds reveal interesting aspects regarding the magnetic state of these compounds. The coexistence of ferro and antiferro magnetic order is seen to determine the magnetic and other related properties. The crystal field effect is found…
The part of electronics packaging is steadily forced to adapt the requirements of the microelectronic industry. For future electronics application such needs will be: 1) steady miniaturisation of the electronic devices 2) high pin count up to 5000 i / o per device 3) pitches down to 20 mum 4) higher current density pe…