Ultrathin films and hollow shells with pillared architectures fabricated via layer-by-layer self-assembly of titania nanosheets and aluminum Keggin ions

Article Abstract:

Inorganic multilayer films and hollow shells with pillared architectures are fabricated layer-by-layer on spherical poly(methyl methacrylate) (PMMA) templates as well as flat substrates through the electrostatic self-assembly technique. Positively charged polyoxocations of aluminum Keggin ions are employed both as inorganic binder and as pillaring agent in electrostatic self-assembly with exfoliated unilamellar crystallites of Ti(sub 0.91)O2, which yielded new types of ultrathin films and core-shell composites.

Aluminum, Thin films, Multilayered, Multilayered thin films, Chemical properties, Methyl methacrylate

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IR-Luminescence PbS-polystyrene nanocomposites prepared from random ionomers in solution

Article Abstract:

A study of PbS nanoparticles having a fairly narrow size distribution (10 -12 %) prepared in situ within a sulfonated polystyrene random ionomer is reported. Photoluminescence (PL) analysis showed that the nanocomposites emit in both the visible and near-infrared regions, with the infrared PL size-tunable in the range 1100-1500 nm.

Observations, Spectra, Optical properties, Chemistry, Physical and theoretical, Physical chemistry, Lead compounds, Photoluminescence

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