Materials Literature
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Sub-100 nm nanomagnets not only are technologically important, but also exhibit complex magnetization reversal behaviors as their dimensions are comparable to typical magnetic domain wall widths. Here we capture magnetic "fingerprints" of 1 billion Fe nanodots as they undergo a single domain to vortex state transition…
We investigate the bonding of H in O vacancies of ZnO using density functional calculations. We find that H is anionic and does not form multicenter bonds with Zn in this compound.
We investigated the electrical properties of heteroepitaxial oxide Schottky junctions, $\mathrm{Sr}\mathrm{Ru}{\mathrm{O}}_{3}∕\mathrm{Sr}{\mathrm{Ti}}_{1\ensuremath{-}x}{\mathrm{Nb}}_{x}{\mathrm{O}}_{3}$ $(0.0002\ensuremath{\leqslant}x\ensuremath{\leqslant}0.02)$. The overall features agree with those of a convention…
$\mathrm{La}\mathrm{Co}{\mathrm{O}}_{3}$ films grown epitaxially on ⟨001⟩ oriented ${(\mathrm{La}\mathrm{Al}{\mathrm{O}}_{3})}_{0.3}{({\mathrm{Sr}}_{2}\mathrm{Al}\mathrm{Ta}{\mathrm{O}}_{6})}_{0.7}$ substrates by pulsed laser deposition exhibit ferromagnetic ordering below a critical temperature, ${T}_{c}$, of $85\pha…
Two methods, coupling self-assembled monolayer and chemical bath deposition (CBD), were utilized to assemble cadmium sulfide (CdS) quantum dots (QDs) onto mesoporous TiO2 films for dye-sensitized solar cell (DSSC) applications. Colloidal CdS QDs were first self-assembled on the TiO2 surface. CBD was then introduced to…
Abstract The published literature relating to damage to SOFCs caused by redox cycling of Ni‐based anodes is reviewed. The review covers the kinetics of Ni oxidation and NiO reduction (as single phases and as constituents of composites with yttria‐stabilised zirconia, YSZ), the dimensional changes associated with redox…
Fe-doped ZnO nanocrystals are successfully synthesized and structurally characterized by using x-ray diffraction and transmission electron microscopy. Magnetization measurements on the same system reveal a ferromagnetic to paramagnetic transition temperature above $450\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ with a low-…
The zigzag edge of a graphene nanoribbon possesses a unique electronic state that is near the Fermi level and localized at the edge carbon atoms. The authors investigate the chemical reactivity of these zigzag edge sites by examining their reaction energetics with common radicals from first principles. A "partial radi…
The accurate description of chemical processes often requires the use of computationally demanding methods like density-functional theory (DFT), making long simulations of large systems unfeasible. In this Letter we introduce a new kind of neural-network representation of DFT potential-energy surfaces, which provides…
In this paper, the adsorption of human serum albumin (HSA), human serum fibrinogen (HFG) and human serum immune globulin (IG) on surfaces of diamond like carbon film (DLC), diamond film (DF) and graphite has been studied. The adsorption isotherms of single component protein solution and the competitive adsorption of b…
High thermal conductivity, along with good electrical and mechanical properties, makes aluminum nitride a very promising material for electronic packaging and substrates. Much work has been reported on the influence of additions and sintering aids on densification and thermal conductivity. In this paper, the influence…
Certain fundamental aspects of the process of sorption of chromium(VI) ions from aqueous solutions at pH 6 and 2 by VION fibrous anion-exchangers with varied basicity were revealed.
The 10th european ALARA network (EAN) workshop took place in Prague (Czech Republic) in September 2006. This was the 10-year anniversary of the EAN, and unlike the previous workshops that addressed a particular ALARA topic, the aim of this workshop was to consider the implementation of the optimisation principle in al…
Silicon carbide whiskers (SiCw) as a kind of high strength fibrous material are widely used in the reinforcement of metal, ceramic and polymer. In this paper preparation of Silicon carbide whiskers by carbon thermal reduction reaction from the mixture of Silica and carbon was investigated with an emphasis on the study…
Resumen: El comportamiento interfacial de fluidos en contacto con superficies solidas esta delimitado en gran medida por las caracteristicas electroquimicas de sus superficies. El pH del medio que lo rodea, la concentracion de las especies ionicas que se encuentran en la disolucion, asi como la presencia de otro tipo…
Ge nanoparticles (NPs) embedded silicon oxide is expected to be promising light emission source, especially, UV -blue light region.We have tried to form Ge NPs in a 100nm-thick SiO 2 layer on Si substrate by multi-energy implantation of Ge negative ions with energies of 50, 20 and 10 keV and doses of 1.4 x 10 16 , 3.2…
The results of tribotests of a new sheet metal-PTFE material with steel counterbodies having different hardness are reported. They show that the material has a high wear resistance in dry friction. The hardening of the counterface increases significantly the permissible load on the metal-PTFE block. It is found that c…
Lead-free Na1/2Bi1/2TiO3-6BaTiO3 (BNT-6BT) ceramics with different dopants were prepared by a conventional ceramic fabrication technique. The influence of doping CeO2, La2O3, Nb2O5 and Co2O3 on the structure was studied, and the mechanism of soft and hard additives with A-site or B-site substitute changing the piezoel…
In this paper, 3D Cf/Si-Ti-C-O composites were prepared with a polytitanocarbosilane (PTC) via polymer infiltration and pyrolysis (PIP) process, and accordingly the mechanical, oxidation resisting and thermal shock resisting properties were investigated. The composites with density of 1.93g·cm-3 show rather high flexu…
Micrometer‐sized CeO 2 powders with bundle‐ and flake‐like morphologies have been successfully synthesized by a precursor‐pyrolysis approach, in which the precursors are first synthesized by a hydrothermal method and CeO 2 powders are finally obtained through a pyrolysis process. Results reveal that the stoichiometric…