Materials Literature
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We have performed an angle-resolved photoemission spectroscopy study of ${\mathrm{La}}_{0.6}{\mathrm{Sr}}_{0.4}{\mathrm{FeO}}_{3}$ using in situ prepared thin films and determined its band structure. The experimental band dispersions could be well explained by an empirical band structure assuming the $G$-type antiferr…
ZnO nanostructures, including nanotowers, nanovolcanoes, nanorods, nanotubes, and nanoflowers, have been grown by using the hydrothermal technique. Most of the ZnO nanostructures show the perfect hexagonal cross section and well-faceted top and side surfaces. The basic chemistry and growth mechanism are discussed. By…
We demonstrate visualization of localized intense electromagnetic fields in real space in well-tailored dimeric and trimeric gold nanospheres by using near-field optical techniques. With two-photon induced luminescence and Raman measurements, we show that the electric field is confined at an interstitial site in the a…
Abstract Recently, a new hybrid supercapacitor, integrating both the advantages of supercapacitors and lithium‐ion batteries, was proposed and rapidly turned into state‐of‐the‐art energy‐storage devices with a high energy density, fast power capability, and a long cycle life. In this paper, a new hybrid supercapacitor…
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The effect of different dopant cations on the phase transformations of the initially stabilized supersaturated tetragonal ZrO(2) phase during various heat treatments has been studied. The obtained fraction of monoclinic grains develop twinned structures, but there is still a lack of information about the character of…
It is a well-known fact that the mechanical properties of polymeric materials deteriorate rapidly under the influence of certain chemicals. Hence, the lubrication of thermoplastic materials such as polyacetale, polyamide or polycarbonate poses a big challenge for the development of lubricants. Also the lubricants and…
The presence of zirconia grains in alumina matrix as a discrete second phase plays an important role in the development of high performance ceramics subjected to intensive thermal as well as mechanical stress. The recent development on transformation toughening by addition of CeO2, Y2O3, MgO or CaO to zirconia in alum…
A generalized approach is proposed for the structure description of the homologous series Ga(4)Ti(m-4)O(2m-2) with crystallographic shear (CS) structures based on that of rutile. A (3 + 1)-dimensional model for an ideal CS structure is built up in connection with the CS operation in three-dimensional space. Its struct…
We propose an optical configuration of a horizontal-switching liquid-crystal cell, consisting of a splayed liquid-crystal cell and uniaxial films, to improve the viewing angle characteristics by compensating for the phase dispersion in a diagonal direction. The optical design of the proposed configuration was performe…
During the last decade, worldwide attention of researchers has focused on nano-ceramic composites with superior mechanical behavior and improved reliability for structural applications. Here we report the development of a multi-layer composite (MLC) of tape cast nano zirconia with high failure energy. The MLC samples…
The use of shape memory alloys for a large number of applications in many fields of engineering has given rise to a great interest of researchers on an exhaustive modeling of their macroscopic behaviour. Most of the models proposed in the literature, however, consider a perfect pseudo-elastic behaviour (i.e. no residu…
High resolution transmission electron microscopy has provided direct experimental evidence of monocrystalline, single-phase zinc-blende MgS. The authors report the first high resolution images of a metastable β-MgS epilayer. This material naturally has rocksalt crystalline structure, but β-MgS was grown in this work b…
No suitable method for the coloration of unmodified polypropylene using aqueous dye solution has yet been found. Currently, the only viable method is the incorporation of pigments during the extrusion of filaments. In this study, two different commercially available forms of pigment (powder and masterbatch) were incor…
Bulk nanocrystalline Ni and Ni-15wt%Fe alloy were fabricated via electrodeposition techniques. The nominal grain size of nickel samples was varied from 15 to 200 nm by employing different deposition parameters. The grain size was further reduced to 9 nm by alloying nickel with iron. The tensile properties were evaluat…
The crystal structure of TlH(2)PO(4) (TDP) has been studied at low temperature. The lattice parameters were derived from high-resolution X-ray powder diffraction in the temperature range between 8 and 300 K. A detailed crystal structure analysis of the antiferroelectric low-temperature phase TDP-III has been performed…
Transition metal-boron complexes BnM have been predicted at density functional theory level to be molecular bowls (n = 8-14) hosting a transition metal atom (M) inside or molecular tires (n = 14) centered with a transition metal atom. Small Bn clusters prove to be effective inorganic ligands to all the VB-VIIIB transi…
A method for the fabrication of n-type porous silicon (n-PS) is developed. The Hall effect is applied in the fabrication process. The majority carriers in n-type Si (electrons) are swept down by the Lorentz force. Enough holes continuously appear on the surface layer to participate in chemical reaction during the etch…
Polycrystalline sample of Pb2Bi3SmTi5O18, a member of tungsten–bronze (TB) family, was prepared using a high temperature solid state reaction technique. X-ray diffraction (XRD) analysis indicated the formation of a single phase orthorhombic structure. AC impedance plots were used as a tool to analyse the electrical be…
The structure of synthetic levyclaudite-(Sb), approximately (Pb(1 - y)Sb(y)S)(1.357)[Sn(1 - x)(Cu(2))(x)S(2)], has been determined by single-crystal X-ray diffraction on the basis of the (3 + 2)-dimensional superspace approach. This misfit-layer compound, of the cylindrite type, results from the combination of two hea…