Monodisperse CuInS(2) nanocrystals are produced by injecting mixed metal-oleate precursors into hot organic solvents containing the dissolved sulphur sources. A better understanding of the formation mechanism of CuInS(2) has enabled us to tailor anisotropic shapes in the form of triangular-pyramid, circular cone, and bullet-like rods with tunable crystal phases by varying the synthetic conditions.

High surface area highly ordered nanoporous thin films are the current gold standard for gas sensor use, however the nanostructure of such films is prone to collapse at annealing temperatures as low as 250 °C resulting in formation of a dense layer of limited utility. We report on a templating method used to deposit highly ordered nanoporous platinum (Pt)-doped tin dioxide (SnO(2)) thin films that are crystallized by a 100 °C water vapor hydrothermal treatment, with the low temperature process being compatible with a large variety of substrates including plastic. The resulting highly ordered nanoporous, transparent Pt-SnO(2) thin films are mechanically stable and can be annealed, as desired, at temperatures up to 800 °C for removal of the templating materials and tailoring of gas sensitivities without damage to the nanoporous structure. The synthesis method is general, offering a promising strategy for preparing high performance nanoporous metal oxide crystalline films for applications including gas sensing, photocatalysis, and 3(rd) generation photovoltaics. In our example application of the synthesized materials, we find that these Pt-SnO(2) films exhibit exceptional hydrogen gas sensing behavior, rapidly detecting low-level hydrogen concentrations at room temperature; for example, an eight order of magnitude change in electrical resistance is seen in response to 10 000 ppm H(2), with only minimal sensitivity to humidity.

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Structural Systematic Design of Organic Templated Samarium Sulfates and Their Luminescence Property. -Compounds (II)-(V) are structurally characterized by single crystal XRD. (II) crystallizes in the monoclinic space group C2/c with Z = 4 and exhibits a three-dimensional porous structure with intersecting extra-large 20-membered ring channels. (III) crystallizes in the orthorhombic space group Pca21 with Z = 4. It is a two-dimensional corrugated layered sulfate constructed by two different zigzag chains and 12-membered rings. Compounds (IV) and (V) crystallize in the triclinic space group P1 with Z = 2. (IV) exhibits a one-dimensional anionic chain structure with protonated dimethylamine and water molecules occluded in the helical [Sm-O-S]n chains. (V) is a new one-dimensional sulfate constructed by tetrameric [Sm2(SO4)2O10] units and 4-membered rings. Strong luminescence of (IV) in the orange (598 nm) region indicates that it is an excellent candidate for orange fluorescent materials. -(ZHANG, D.; ZHENG, L.; QIU, X.; XU*, Y.; FU, J.; ZHU, D.; RSC Adv. 2 (2012) 1, 217-225, http://dx.

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