Materials Literature
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We carried out systematic planar Hall effect (PHE) measurements of GaMnAs ferromagnetic semiconductor film as a function of temperature. The two-step switching of the PHE occurring in the magnetization-reversal process was observed to change significantly as the temperature was increased. To investigate the mechanism…
Multiferroic BiFe0.5Cr0.5O3 solid solution epitaxial films were grown by pulsed laser deposition on SrTiO3 (001) substrates with SrRuO3 bottom electrodes. Formation of the metastable composition in the form of high-quality epitaxial films was made possible by a sequential deposition of 0.1 unit cell amounts of BiFeO3…
Make up and break up: A pH-responsive system that displays switchable adhesion in situ is described. Polyacid gels and polybases grafted to a substrate (brushes) strongly adhere in water, but in an acidic environment, the gel and brush dissociate. Adhesion can be controlled by environmental acidity and the process can…
High-performance nitride phosphors, Ba2Si5N8:Eu2+, were prepared by the self-propagating high temperature synthesis method. The broadband absorption in the range of 380–500nm indicated that the resultant phosphors were effectively excited by an InGaN blue light-emitting diode (400∕470nm). The emission peak position of…
Low density composite powders of hollow microsphere/titania/M-type Ba ferrite were prepared using a two-step sol-gel technique. Their electromagnetic wave absorption properties were investigated in the 2–18GHz frequency range. Reflection loss less than −20dB was obtained between 7.5–9.4GHz for paraffin composites cont…
A cubic ordered perovskite $\mathrm{Bi}{\mathrm{Cu}}_{3}{\mathrm{Mn}}_{4}{\mathrm{O}}_{12}$ has been synthesized under $6\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$ and $1000\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$. $\mathrm{Bi}{\mathrm{Cu}}_{3}{\mathrm{Mn}}_{4}{\mathrm{O}}_{12}$ is a fer…
The majority of optical diagnostics presently foreseen for ITER will implement in-vessel metallic mirrors as plasma-viewing components. Mirrors are used for the observation of the plasma radiation in a very wide wavelength range: from about 1 nm up to a few mm. In the hostile ITER environment, mirrors are subject to e…
We report large scale molecular dynamics simulations of dynamic cyclic uniaxial tensile deformation of pure, fully dense nanocrystalline Ni, to reveal the crack initiation, and consequently intergranular fracture is the result of coalescence of nanovoids by breaking atomic bonds at grain boundaries and triple junction…
We observe unidirectional charge density wave (CDW) ordering on the quasi-2D material ${\mathrm{TbTe}}_{3}$ with a scanning tunneling microscope at $\ensuremath{\sim}6\text{ }\text{ }\mathrm{K}$. Our analysis indicates that the CDW is fully incommensurate, with wave vector ${q}_{\mathrm{CDW}}\ensuremath{\approx}0.71\i…
The phosphors of ${\mathrm{Ce}}^{3+}$ activated ${\mathrm{Ba}}_{2}\mathrm{Ca}{(\mathrm{B}{\mathrm{O}}_{3})}_{2}$ with chemical formulas ${\mathrm{Ba}}_{2(1\ensuremath{-}x)}{\mathrm{Ce}}_{x}{\mathrm{Na}}_{x}\mathrm{Ca}{(\mathrm{B}{\mathrm{O}}_{3})}_{2}$ and ${\mathrm{Ba}}_{2}{\mathrm{Ca}}_{1\ensuremath{-}2x}{\mathrm{Ce…
The development of minimally invasive therapeutics for orthopedic clinical conditions has substantial benefits, especially for osteoporotic fragility fractures and vertebral compression fractures. Poly(ester urethane)urea (PEUUR) foams are potentially useful for addressing these conditions because they cure in situ up…
Ceramics with the nominal compositions of CaCu3−xLa2x∕3Ti4O12 were prepared by the conventional solid-state reaction technique. It was found that these ceramics have the properties of rather high dielectric permittivity and sufficiently low dielectric loss. In particular, CaCu2.9La0.2∕3Ti4O12 ceramics sintered at 1050…
Through-wafer interconnects by aligned carbon nanotube for three-dimensional stack integrated chip packaging applications have been reported in this letter. Two silicon wafers are bonded together by tetra-ethyl-ortho-silicate. The top wafer (100μm thick) with patterned through-holes allows carbon nanotubes to grow ver…
Recent progress in the RF low activation structural materials R&D road map towards DEMO via the FBR tests (BOR-60, BN-600, BN-800) and the TBM tests in ITER is overviewed. The properties of the RAFMS RUSFER-EK-181 (Fe?12Cr?2W?Ta?V?B?C) and the V?4Ti?4Cr alloys are presented. The next important steps include further st…
It is shown that the tetragonal (T) and rhombohedral (R) structures of (1−x)BiFeO3–xPbTiO3 are stable for xT⩾0.31 and xR⩽0.27, respectively, giving the narrowest width of 0.03, reported so far, for the morphotropic phase boundary region in this system. The Rietveld refined structure of the T phase for x=0.31 reveals p…
The shell of the Japanese pearl oyster, Pinctada fucata, consists of two layers, the prismatic layer on the outside and the nacreous layer on the inside, both of which comprise calcium carbonate and organic matrices. Previous studies indicate that the nacreous organic matrix of the central layer of the framework surro…
Here, the authors report the energy transfer from rhodamine 6G dyes to gold nanoparticles. There is a pronounced effect on the photoluminescence and a shortening of the lifetime of the dye when interacting with the Au nanoparticles. The calculated distance (d) between the donor and acceptor varies from 86.06to102.47Å…
Conductance measurements of a molecular wire, contacted between an epitaxial molecule-metal bond and the tip of a scanning tunneling microscope, are reported. Controlled retraction of the tip gradually de-hybridizes the molecule from the metal substrate. This tunes the wire into the Kondo regime in which the renormali…
Bamboozled! High-aspect-ratio TiO2 nanowires (see image) that are vertically split off from anodic titanium oxide nanotubes are prepared by anodization of titanium foils. The bamboo-splitting model based on the hydrolysis of a small amount of water in viscous ethylene glycol at high voltage is proposed as the mechanis…
Growing up: The controlled formation of platinum nanoparticles of many shapes (see image) including cubes, rectangular prisms, triangular prisms, rods, tripods, octapods, and polypods have been produced in a simple synthetic protocol by varying reaction parameters.