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  1. No Access

    Article

    Control of the Luminescence Properties in Polythiophenes Solutions by Interring Rotational Disorder

    The photoluminescence properties of thiophene-based polymers obtained by the random copolymerization of 3,4s-dibutylthiophene and 3s-butylthiophene are reported. Optical absorption spectra, cw photolumninescen...

    S. Luzzati, G. Bongiovanni, M. Catellani, M. A. Loi… in MRS Online Proceedings Library (1997)

  2. No Access

    Article

    Photoexcitation Dynamics in Polymeric Heterostructures

    We investigate the dynamics of photoexcitations in thiophene-based copolymers by site-selective and time-resolved photoluminescence spectroscopies. We attribute the large Stokes-shift observed between the abso...

    G. Bongiovanni, S. Destri, A. Mura, A. Piaggi, R. Tubino in MRS Online Proceedings Library (1995)

  3. No Access

    Chapter

    Photoexcitations in Polydiacetylenes

    Recent progress in the field of information processing has encouraged the search for new conjugated polymers with low energy gaps and large third order cubic susceptibilitiesl, 2. Among these materials, polydiace...

    G. Dellepiane, C. Cuniberti, D. Comoretto… in Frontiers of Polymers and Advanced Materia… (1994)

  4. No Access

    Article

    Influence of annealing temperature on structural, electrical and optical properties of WSi2

    WSi2 polycrystalline films of different thicknesses were prepared by low pressure chemical vapor deposition on silicon wafers, and their crystallization properties were studied as a function of the annealing temp...

    M. Amiotti, E. Bellandi, A. Borghesi, A. Piaggi, G. Guizzetti, F. Nava… in Applied Physics A (1992)

  5. No Access

    Article

    Ellipsometry with fourier transform spectrometer: An application to TaSi2 films

    Ellipsometric measurements on TaSi2 polycrystalline films are presented in this paper. The optical functions are directly obtained in the wavenumber range from 400 to 3000 cm−1 using an infrared ellipsometer coup...

    A. Röseler, F. Marabelli, G. Guizzetti, A. Borghesi, A. Piaggi in Il Nuovo Cimento D (1991)

  6. No Access

    Chapter

    Raman Cross-Sections of Highly Oriented CIS-Polyacetylene

    It is well known that resonance Raman scattering, obtained by exciting wavelengths close to the lowest allowed optical transition of semiconducting polymers, provides a great amount of information concerning s...

    G. Lanzani, A. Piaggi, A. Borghesi… in Lower-Dimensional Systems and Molecular El… (1990)

  7. No Access

    Article

    Oxygen and Iron Redistribution upon Thermal Treatment in Iron Implanted Silicon

    In order to study the iron-oxygen interaction and their redistribution in silicon, different doses of 100 keV iron ions have been implanted into CZ silicon substrates, and subsequently annealed. The redistribu...

    B. Pivac, A. Borghesi, L. Ottolini, M. Geddo, A. Piaggi… in MRS Online Proceedings Library (1989)