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  1. Article

    Open Access

    Raman amplification for trapped radiation in crystalline single Si nanoparticle

    In a single crystalline Si particle, we observed a huge amplification of the Raman peak at 521 cm−1. With an AFM microscope, coupled with a Micro-Raman spectrometer, we investigate a single Si particle at wavelen...

    G. Mannino, M. Condorelli, G. Compagnini, G. Faraci in Scientific Reports (2023)

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  2. No Access

    Article

    Resonant depolarized dynamic light scattering of silver nanoplatelets

    Polarized and depolarized dynamic light scattering (DDLS) methodology was carried out on silver nanoplatelets showing strong plasmon-enhanced scattering. The hydrodynamic properties of the nanoparticles were d...

    M. Zimbone, E. Messina, G. Compagnini, M. E. Fragalà… in Journal of Nanoparticle Research (2015)

  3. No Access

    Article

    Rotational dynamics of gold nanoparticle chains in water solution

    In this work we report a study on the determination of the shape of aggregated gold colloids, obtained by adding pyridine to a solution of pure gold nanoparticles prepared by laser ablation in water studying t...

    M. Zimbone, P. Musumeci, P. Baeri, E. Messina… in Journal of Nanoparticle Research (2012)

  4. No Access

    Article

    Si/SiO2 core shell clusters probed by Raman spectroscopy

    Using a pulsed microplasma source, clusters were produced through the ablation of a Si cathode and successive supersonic expansion. The Si cluster beam was deposited onto different substrates and the partial...

    G. Faraci, S. Gibilisco, P. Russo… in The European Physical Journal B - Condense… (2005)

  5. No Access

    Article

    Formation and characterization of high-density silver nanoparticles embedded in silica thin films by “in situ” self-reduction

    Silver nanoparticles (10–20 nm) embedded into silica thin films have been obtained through the use of a silver organometallic precursor compound dissolved in Spin-On-Glass and subsequently spinned onto suitabl...

    G. Compagnini, M. M. Fragal´, L. D’Urso, C. Spinella… in Journal of Materials Research (2001)

  6. No Access

    Article

    Silver nanoparticles dispersed in polyimide thin film matrix

    A new metallorganic silver precursor, Ag(hfa)tetraglyme, has been used to produce silver aggregates into polymeric thin film matrices by thermal reduction in a temperature range between 200 °C and 300 °C. Here...

    M.E. Fragalà, G. Compagnini, G. Malandrino… in The European Physical Journal D - Atomic, … (1999)

  7. No Access

    Article

    Ion beam enhanced thermal depolymerization of poly(methyl methacrylate)

    Ion beam enhanced thermal depolymerization of poly(methyl methacrylate) thin films, 1–2 µm thick, has been studied in the temperature range 100–400 °C using a 300 keV He+ beam at very low fluence (5 × 1010−5 × 10

    M. E. Fragalà, G. Compagnini, O. Puglisi in Journal of Materials Research (1999)

  8. No Access

    Chapter and Conference Paper

    Silver nanoparticles dispersed in polyimide thin film matrix

    A new metallorganic silver precursor, Ag(hfa)tetraglyme, has been used to produce silver aggregates into polymeric thin film matrices by thermal reduction in a temperature range between 200 °C and 300 °C. Here...

    M. E. Fragalà, G. Compagnini, G. Malandrino, C. Spinella… in The European Physical Journal D (1999)

  9. No Access

    Article

    The Effect of Bonding Disorder on the Vibrational Features of Amorphous Carbon Based Binary Alloys

    In this work we report some results concerning Raman characterisation of covalently bonded amorphous carbon based thin films (∼ 100 nm) of binary alloys, obtained by ion implantation of carbon ions into silico...

    G. Compagnini, G. Foti in MRS Online Proceedings Library (1997)

  10. No Access

    Article

    Surface Enhanced Raman Active Nanoparticles in Plasma Treated Silver surfaces

    A plasma oxidation-reduction process has been found to be suitable to produce silver surfaces showing Surface Enhanced Raman (SER) activity. SER spectra of monodisperse polystyrene films and of other smaller m...

    G. Compagnini, B. Pelligra, B. Pignataro in MRS Online Proceedings Library (1997)

  11. No Access

    Article

    Spectroscopic characterization of annealed Si1−xCx films synthesized by ion implantation

    Amorphous hydrogenated silicon carbon alloys were synthesized by C2H2 ions implantation in a silicon substrate at different fluences to obtain samples with different carbon atomic concentrations (10–50 at. %). As...

    G. Compagnini, L. Calcagno, G. Foti, G. Baratta in Journal of Materials Research (1996)

  12. No Access

    Article

    Optical and structural properties of semi-insulating polycrystalline silicon thin films

    Optical properties of semi-insulating polycrystalline silicon (SIPOS) thin films containing 30 at. % oxygen atoms are investigated in the near ultraviolet, visible and infrared region to improve knowledge on t...

    G. Compagnini, S. Lombardo, R. Reitano, S. U. Campisano in Journal of Materials Research (1995)

  13. No Access

    Article

    The dielectric constant of TCNQ single crystals as deduced by reflection electron energy loss spectroscopy

    The dielectric constant of tetracyanoquinodimethane (TCNQ) single crystals has been obtained by reflection electron energy loss spectroscopy (REELS) over the 0–60 eV energy range, using primary electron energi...

    G. Mondio, F. Neri, G. Curró, S. Patané, G. Compagnini in Journal of Materials Research (1993)

  14. No Access

    Article

    Spectroscopic characterization of cometary samples

    After presenting a summary of what is presently known from cometary vibrational spectroscopy, we discuss briefly some possible results to be anticipated from future non-sample-retum cometary missions which, ho...

    G. Strazzulla, G. A. Baratta, G. Compagnini, G. Foti in Space Science Reviews (1991)

  15. No Access

    Article

    Rheo-Optical Properties of Ion Irradiated Polystyrene Films

    Rheological and optical properties of polystyrene are modified by 200 keV He irradiation because of new molecular bonds induced by ion energy deposition. Total amount of bonds, as calculated by optical measure...

    L. Calcagno, G. Compagnini, G. Foti, A. Mezzasalma… in MRS Online Proceedings Library (1990)