1,721,073 research outputs found
Efficient Charge storage in photoexcited TiO2 nanorod-noble metal nanoparticle composite systems
No full textFollowing UV-illumination, TiO2 nanorod-stabilized noble metal (Ag, Au) nanoparticles dispersed in deaerated organic mixtures can sustain a higher degree of conduction band electron accumulation than that achievable with pristine titania
Synthesis of TiO2-Au Composites by Titania Nanorod-Assisted Generation of Gold Nanoparticles at Aqueous/Nonpolar Interfaces
No full textHydrophobically coated anatase TiO2 nanorods can assist the reduction of AuCl4-ions at aqueous/nonpolar solvent interfaces, which results in the generation of organic-soluble Au nanoparticles with tunable size in the absence of any metal ligands and/or phase-transfer agents. The titania-nanorod-driven modulation of interfacial energy and catalysis of gold nucleation provide straightforward access to nanocomposite solutions of TiO2-stabilized Au nanoparticles. Among colloidal approaches, this method represents a unique tool for the surfactantless, large-scale preparation of nanostructured semiconductor-metal hybrid systems with relevant technological potential in catalysis, photocatalysis, and charge-storage processes
Photoelectrochemical sensitisation process at photosynthetic pigments/Q-sized colloidal semiconductor hetero-junctions
No full textHeterojunctions based on photosynthetic pigments/oxide nanocrystals for photovoltaic application
No full textLow-Dimensional Chainlike Assemblies of TiO2 Nanorod-Stabilized Au Nanoparticles
No full textA simple and versatile light-based strategy to grow low-dimensional gold superstructures is presented; prolonged UV-irradiation of TiO2 nanorod-stabilized Au nanoparticles in organic media promotes the progressive formation of distinctive chainlike metal assemblies, namely segments of a few gold particles, 2D or quasi-1D large structures composed of interlacing lines of hundreds of metal units over areas of about 500 nm
Shape and phase control of colloidal ZnSe nanocrystals
No full textShape- and phase-controlled ZnSe nanocrystals are synthesized in hot mixtures of long-chain alkylamines and alkylphosphines. The variation in the rate of precursor addition, down to low and controlled levels, allows the nucleation, as well as the growth of the nanocrystals, to switch between the wurtzite and the zinc blend structures. Such a level of control leads to a variety of shapes, from spheres to rods to three-dimensional structures formed by rod sections interconnected through branching points. The temperature- and time-dependence of the chemical potentials for the monomer species in solution are the most relevant parameters involved in the growth mechanis
Semiconductor nanocrystals/M(II)-phthalocyanine heterojunctions:spectroscopic and photoelectrochemical properties
No full textChemica characterisation of ancient pottery from South Italy by ICP-OES. Statistical multivariate analysis of data
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