Materials Literature
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Endocytosis or not endocytosis: The pathway of the internalization of single-walled carbon nanotube (SWNT) conjugates into mammalian cells was determined to be energy-dependent endocytosis through clathrin-coated pits.
Today more than 400 light water power reactors (LWRs) operate worldwide providing approximately 17% of the world's electricity demand. One important component for their successful operation is the fuel tube, made out of a zirconium alloy. A huge number of out-of-pile and in-pile experiments have been performed to impr…
Experimental data on the residual electrical resistivity in concentrated Fe-Cr alloys point to strong deviation from Nordheim-like behavior: resistivity stays nearly constant over $10--60\phantom{\rule{0.3em}{0ex}}\mathrm{at.}\phantom{\rule{0.2em}{0ex}}%$ Cr concentration range. These data are compared to the results…
Doping change and distortion effect on the double-exchange ferromagnetism are studied within a simplified double-exchange model. The presence of distortion is modelled by introducing the Falicov-Kimball interaction between itinerant electrons and classical variables. By employing the dynamical mean-field theory the ch…
A study of the Thermus thermophilus chorismate mutase (TtCM) is described by using quantum mechanics (self-consistent-charge density-functional tight binding)/molecular mechanics, umbrella sampling, and the weighted histogram analysis method. The computed free energies of activation for the reactions in water and TtCM…
A highly luminescent zinc(II) complex has been prepared using 3-hydroxypicolinamide; it has a six-coordinated octahedral structure with hydroxides as axial ligands in solution.
Film developments: Multiwalled carbon nanotubes are flexible enough to coat polystyrene microspheres (see image). A monolayer of such spheres can be deposited onto a glass substrate and then coated with a polymeric thin film, which retains the conducting properties of the carbon nanotubes. Such nanoengineered material…
We report a study of the Mn local structure, magnetism, and Ga moments in molecular beam epitaxy grown Mn-doped GaN films. Using x-ray absorption spectroscopy and magnetic circular dichroism, we find two distinct Mn sites and a Ga moment antiparallel to Mn. First-principles calculations reproduce this phenomenology an…
In the form of a tutorial addressed to non-specialists, the article provides an introduction to nuclear reactor technology and more specifically to Light Water Reactors (LWR); it also shows where materials and chemistry problems are encountered in reactor technology. The basics of reactor physics are reviewed, as well…
Abstract Polyaniline (PANI) has attracted lasting interest due to its unconventional electronic, optical, and electro‐optical properties. A rigid backbone polymer, PANI exhibits very strong intra‐ and intermolecular interactions governing its overall behavior. The purpose of this study is to investigate theoretically…
The $\ensuremath{\beta}$ relaxation is a principal source of information about the dynamics in the glassy state; however, the nature of this process remains a controversial issue. In this paper, we show that properties of the $\ensuremath{\beta}$ relaxation measured below ${T}_{\mathrm{g}}$ are sensitive to the struct…
Gut gemischt! Zn1−xCoxO-Nanodrähte wurden mit einem lösungsbasierten Syntheseverfahren erhalten. Gemäß struktureller, optischer und spektroskopischer Charakterisierung ersetzen bei der Cobaltdotierung die Cobaltatome die Zinkkationen im Wirtsgitter (im Bild sind Co-dotierte ZnO-Nanodrähte zu sehen).
The dielectric and conductive properties of Bi3.25La0.75TiO3 ferroelectric films were investigated in the temperature range of 25°C–600°C. A dielectric peak with a relaxation-type characteristic was observed around 400°C. This peak can be greatly suppressed or eliminated by high sintering temperature or annealing in a…
In the first stage, we observed the study of the degradation behavior of alkaline-treated poly(epsilon-caprolactone) (PCL) in two biologically-related media: phosphate buffered saline (PBS) and Dulbecco's modified Eagle's medium (DMEM) for 18 months, finding a much accelerated degradation in the last one. As expected,…
We have investigated the dual functionality of multiferroic YMnO3, which simultaneously possesses antiferromagnetic and ferroelectric properties. When the YMnO3 was used as a pinning layer, it gave rise to an exchange bias and enhanced coercivity in a soft ferromagnetic film which depended on the YMnO3 crystal orienta…
We demonstrate that nonlinear electrical transport through a two-terminal nanoscale sample is not symmetric in the magnetic field B. More specifically, we have measured the lowest order B-asymmetric terms in single-walled carbon nanotubes. Theoretically, these terms can be used to infer both the strength of electron-e…
Plutonium recycling in Light Water Reactors is today an industrial reality. It is recycled in the form of (U, Pu)O2 fuel pellets (MOX), fabricated to a large extent according to UO2 technology and pellet design. The similarity of physical, chemical, and neutron properties of both fuels also allows MOX fuel to be burnt…
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Iodine is a main fission product of the fuel generated during power operation in nuclear power plants (NPPs). A severe NPP accident can cause fuel, containing fission products (FPs), control rod assemblies and core structures to melt and then release into the containment. The key signatures of iodine behaviour during…
The halides ${\mathrm{CaCl}}_{2},{\mathrm{CaBr}}_{2}$, and ${\mathrm{CrCl}}_{2}$ all adopt, at room temperature, the same distorted rutile structure, in orthorhombic space group $\mathit{Pnnm}$, known as the calcium chloride structure. Upon heating, ${\mathrm{CaCl}}_{2}$ and ${\mathrm{CaBr}}_{2}$ each undergoes a cont…