Výsledky vyhledávání - "Riccardo Polloni"

Synthesis and luminescence properties of ZrO2 and ZrO2/SiO2 composites incorporating Eu(III)–phenanthroline complex prepared by a catalyst-free sol–gel process

Autor: Stefania Bucella, Adolfo Speghini, Pietro Riello, Marco Bettinelli, Barbara Federica Scremin, Alvise Benedetti, Riccardo Polloni, Paolo Calvelli

Publikováno v: Optical Materials. 27:249-255

Class I organic–inorganic hybrid materials consisting of zirconia and zirconia/silica matrices doped with europium(III)–1,10-phenanthroline complex were prepared by a catalyst-free sol–gel route. Two different experimental procedures were devel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1766ec042aad4e229e2e6401b5bfb23
https://doi.org/10.1016/j.optmat.2004.05.001

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RF magnetron co-sputtering deposition of Cu-based nanocomposite silica films for optical applications

Autor: Riccardo Polloni, Francesco Gonella, Giovanni Mattei, Barbara Federica Scremin, Giancarlo Battaglin, Elti Cattaruzza, Cinzia Sada, Paolo Mazzoldi, Valentina Bello

Publikováno v: Journal of Non-Crystalline Solids. :689-693

The size, the size distribution, the structure and the concentration of the metallic particles embedded in a host dielectric matrix determine the linear and non-linear optical properties of this kind of composite glasses. In this work, copper-contain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c3578f0b23de5120174f7c0a85a3cb8
https://doi.org/10.1016/j.jnoncrysol.2004.08.156

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Luminescence time decay from Cu+ ions in sol–gel silica coatings

Autor: J. Llopis, Marina Villegas, M.A Garcı́a, E. Borsella, Riccardo Polloni, S.E. Paje

Publikováno v: Journal of Luminescence. 93:253-259

UV photo-excited luminescence from Cu-doped sol–gel silica coatings has been investigated. The intense emission in the visible part of the spectrum is assigned to electronic transitions 3d 9 4s 1 →3d 10 in Cu + ions. Photoluminescence time decay

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e25bb698020aeb8e0595e92ebd5e72ff
https://doi.org/10.1016/s0022-2313(01)00185-5

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Spectroscopic investigation of silver in soda-lime glass

Autor: Alberto Quaranta, Francesco Gonella, Giancarlo Battaglin, Riccardo Polloni, P. Mazzoldi, Elisabetta Borsella

Publikováno v: Scopus-Elsevier

Spectral and time-resolved luminescence of silver in ion-exchanged soda-lime glass are investigated for samples with different Ag concentrations. The evolution of the observed spectroscopic features are correlated with structural changes in the silve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7303eda2406bb77e1f4c9914bdcce695
https://doi.org/10.1016/s0009-2614(97)01445-0

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Z-scan study on the nonlinear refractive index of copper nanocluster composite silica glass

Autor: Francesco Gonella, Giovanni Mattei, Elti Cattaruzza, Giancarlo Battaglin, Paolo Calvelli, Riccardo Polloni, Paolo Mazzoldi

Publikováno v: Applied Physics Letters. 78:3953-3955

We used the Z-scan technique for measuring the nonlinear refractive index n2 of a thin composite film formed by copper nanoparticles embedded in silica glass. By varying the number of pulses of the laser shot, we evidenced heating effects induced by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5cac790ca0751313ed523e670669874
https://doi.org/10.1063/1.1380243

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A new pyrolyzer for laser pyrolysis—gas chromatography/mass spectrometry experiments

Autor: Pietro Traldi, Francesco Cecchinato, Walter Cecchetti, Silvia Catinella, Roberta Seraglia, Riccardo Polloni, Gino Bergamasco

Publikováno v: Journal of Analytical and Applied Pyrolysis. 23:165-173

In order to study molecules of relatively large molecular weight, pyrolysis techniques can be combined with mass spectrometry methods. In the past, pyrolysis—MS and pyrolysis—gas chromatography/mass spectrometry experiments on melanins and glycat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3cebd69a6f7868a5946c5f362e187a39
https://doi.org/10.1016/0165-2370(92)85004-5

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Comparison of hard vaporization and soft ionization techniques in the mass spectrometry of some palladium(II) and platinum(II) complexes with C-bonded heterocyclic ligands

Autor: Bruno Crociani, Roberta Seraglia, Roberta Bertani, Riccardo Polloni, Pietro Traldi, W. Cecchetto

Publikováno v: Inorganica Chimica Acta. 174:61-66

Electron impact, fast atom bombardment and laser induced vaporization techniques are compared in the mass spectrometric behaviour of some palladium(II) and platinum(II) complexes with C-bonded heterocyclic ligands of the type trans -[MCl(R N )(PPh 3

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99ff75352952fd8a505f9366424e1926
https://doi.org/10.1016/s0020-1693(00)80279-0

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Au–Cu nanoparticles in silica glass as composite material for photonic applications

Autor: Francesco Gonella, Giovanni Mattei, Elti Cattaruzza, Cinzia Sada, Bf Scremin, Riccardo Polloni, Paolo Mazzoldi, Giancarlo Battaglin

Publikováno v: Applied surface science 254 (2007): 1017–1021. doi:10.1016/j.apsusc.2007.07.158
info:cnr-pdr/source/autori:Cattaruzza E.; Battaglin G.; Gonella F.; Polloni R.; Scremin B.F.; Mattei G.; Mazzoldi P.; Sada C./titolo:Au-Cu nanoparticles in silica glass as composite material for photonic applications/doi:10.1016%2Fj.apsusc.2007.07.158/rivista:Applied surface science/anno:2007/pagina_da:1017/pagina_a:1021/intervallo_pagine:1017–1021/volume:254

In the framework of metal nanocluster composite glasses for photonic application, (gold + copper)-containing silica films were synthesized by radiofrequency co-sputtering deposition technique by varying the Au/Cu ratio. To obtain the formation of met

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79e18759f347ebae53b30438af14816b
http://hdl.handle.net/10278/37820

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Large third-order optical nonlinearity of nanocluster-doped glass formed by ion implantation of copper and nickel in silica

Autor: Francesco Gonella, Giovanni Mattei, Riccardo Polloni, Elti Cattaruzza, Mauro Falconieri, P. Mazzoldi, M. Piovesan, Giancarlo Battaglin, G. Salvetti

Publikováno v: Applied Physics Letters. 73:288-290

Composite glasses containing different metal nanoclusters were obtained by implanting copper, nickel, or copper+nickel ions in SiO2 glass. The nonlinear refractive index of the composites was determined by the Z-scan method at a wavelength of 770 nm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9ee55db48fe9cfdf701a2de3e67686b
https://doi.org/10.1063/1.121797

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Effect of the microstructure on concentration quenching in heavily doped Tb2O3-ZrO2 nanoparticles embedded in silica

Autor: Enrico Trave, Pietro Riello, Davide Cristofori, Riccardo Polloni, Paolo Mazzoldi, Stefania Bucella, Alvise Benedetti

Tb 3+ -doped ZrO 2 samples were prepared both as pure compounds and as a nanocomposite made up of sub-5 nm crystalline nanoparticles developed in an amorphous silica matrix. The materials were characterized by using HRTEM, XRD and luminescence spectr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7a85a4231acceee0f129199cc1bf490
http://hdl.handle.net/10278/28534

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