Materials Literature
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In this letter we report the Raman spectra of vanadate nanotubes (VONTs). The spectra present a clear signature that can be used for probing the tubular structure. The temperature effects on the structure of dodecylamine- and Cu-intercalated VONTs were studied by changing the laser power density during the Raman measu…
In the present study the catalytic activities of several TiO 2 -supported metal and metal oxide catalysts have been tested simultaneously for the selective catalytic reduction of nitrogen oxides with ammonia (NH 3 -SCR) using high-throughput-screening equipment. Two different series of various catalyst samples were ev…
Polyelectrolyte multilayer adsorption on mica was studied by the streaming potential method in the parallel-plate channel setup. The technique was calibrated by performing model measurements of streaming potential by using monodisperse latex particles. Two types of polyelectrolytes were used in our studies: poly(allyl…
The cycloreversion (ring-opening) process of one of the photochromic diarylethene derivatives, bis(2-methyl-5-phenylthiophen-3-yl)perfluorocyclopentene, was investigated by means of picosecond and femtosecond laser photolysis methods. The drastic enhancement of the reaction yield was observed only by the picosecond la…
A protein sensor based on nanostructured adaptive silver films (ASFs) is developed for soft protein adsorption and detection with surface-enhanced Raman scattering (SERS). Under protein deposition, the ASFs modify their local nanostructure so that the conformational state of proteins is preserved and SERS is optimized…
The molecular radical 1,3,2-dithiazolo[4,5-b]pyrazin-2-yl (PDTA) exhibits magnetic bistability just above room temperature, undergoing a well-defined hysteretic phase change with TC downward arrow = 297(1) K and TC upward arrow = 343(1) K. The crystal structures of the two phases of PDTA have been determined by single…
We demonstrate a novel approach for the large-scale, shape-controlled synthesis of one-dimensional (1D) corrugated nanoarrays of Pb(1-x)Mn(x)Se nanocrystals (0.002 < or = x < or = 0.008) through an in-situ self-assembly without using either capping polymer or ionic surfactant. The one-step-prepared 1D nanoarrays exhib…
The monometallic precursors L1Cu and L2Cu (L1H2 standing for 1,3-bis((3-ethoxysalicylidene)amino) propane and L2H2 standing for 1,2-bis((3-methoxysalicylidene)amino) ethane) react with sodium dicyanamide (dca) (NaN3C2), a mixture of gadolinium nitrate, and sodium dicyanamide to yield heterodinuclear L2CuNa(NCNCN) and…
Abstract In contrast to the regular morphologies displayed by synthetic single crystals, biogenic single crystals frequently exhibit unusual forms and curved surfaces. Such controlled mineralization in biology occurs within restricted volumes constructed for this purpose and there is significant evidence that some cry…
Purification of CVD synthesized single-wall carbon nanotubes by different acid oxidation treatments, Yu Li, Xiaobin Zhang, Junhang Luo, Wanzhen Huang, Jipeng Cheng, Zhiqiang Luo, Ting Li, Fu Liu, Guoliang Xu, Xiaoxing Ke, Lin Li, Herman J Geise
A family of binary oxide compositions, including titania−zirconia, titania−alumina, alumina−zirconia, zirconia−silica, and alumina−silica, with a hierarchically bimodal mesoporous−macroporous structure has been prepared. The macropores are in one-dimensional orientation, parallel with each other, and the macroporous f…
A catalyst of copper oxide supported on cerium oxide has been characterized by XRD, Raman, XAFS, XPS, and EPR techniques. Its redox properties under CO/O 2 have been explored with XPS and EPR. The results reveal the presence of mainly CuO-related species highly dispersed over the nanosized ceria support and essentiall…
Cryptocrystal layers of ammonium silicon fluoride (NH4)2SiF6 were grown on silicon wafers by dry etching using the vapors of HF:HNO3 solution at room temperature. As-grown layers are composed of white granular crystalline film with thicknesses of up to 8 micrometer which were synthesized with growth rates of around 1…
Ge x P x S 1−2 x glasses in the compositional range have been synthesized and examined in temperature modulated differential scanning calorimetry (MDSC) and Raman scattering experiments. Trends in the non-reversing enthalpy Δ H nr ( x ) near T g show the term to almost vanish in the 0.090(5)< x <0.135(5) range, and to…
We propose a novel approach to model amorphous materials using a first principles density functional method while simultaneously enforcing agreement with selected experimental data. We illustrate our method with applications to amorphous silicon and glassy GeSe 2 . The structural, vibrational and electronic properties…
X-ray and neutron powder diffraction data as a function of temperature are analyzed for the colossal dielectric constant material CaCu3Ti4O12. The local structure is studied using atomic pair distribution function analysis. No evidence is found for enhanced oxygen displacement parameters suggesting that short-range oc…
Dimensionality is known to play a key role in the solution behavior of nano- and mesoparticles. In particular, the shape and the range of the attractive van der Waals interparticle potential are determined by the number of microscopic versus mesoscopic dimensions. For single-walled nanotubes (SWNTs), where two of the…
A variety of redispersible Eu(3+)-doped LaPO(4) nanoparticles have been prepared in a high-boiling coordinating solvent mixture, and the Eu(3+) lattice sites of these materials have been investigated by luminescence line-narrowing measurements. In this spectroscopic method, Eu(3+) ions occupying different lattice site…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward Systematic Understanding of Diversity of Electronic Properties in Low-Dimensional Molecular SolidsHitoshi Seo, Chisa Hotta, and Hidetoshi FukuyamaView Author Information Correlated Electron Research Center (CERC), AIST Tsukuba Central 4, Ibaraki 305-8562, Japan Depart…
We present a non-mechanical, dynamically programmable, all-optical image rotator, which can rotate an input image to any angle or a grid given by 360°/2<sup>n</sup>, where n is the number of stages. The image rotator uses cascaded stages in which each stage rotates the image by an angle given by half the previous…