18 Result(s)

Article

Raman spectral map** reveal molecular changes in cellulose aging induced by ultraviolet and extreme ultraviolet radiation

In the framework of a study on the aging phenomena of textiles we used Raman spectral map** to analyze changes in the chemical bonds of cellulose of flax fabrics exposed to ultraviolet (UV) radiation in air,...

S. Botti, P. Di Lazzaro, F. Flora, L. Mezi, D. Murra in Cellulose (2024)

Article

Association of phytoplasmas and viruses with malformed clovers

Plants ofTrifolium spp. exhibiting two different kinds of symptoms — phyllody associated with yellowing/reddening, and dwarf growth habit without floral abnormalities — were observed in several areas of the Czech...

Fránová, S. Paltrinieri, S. Botti, M. Šimková, A. Bertaccini in Folia Microbiologica (2004)

Article

Second-and third-harmonic generation by carbon nanotubes irradiated with femtosecond laser pulses

Femtosecond pulses of a Cr:forsterite laser are used to study second-and third-harmonic generation in a layer of single-wall carbon nanotubes produced by low-velocity spraying. The harmonic amplitude in our ex...

D. A. Akimov, M. V. Alfimov, S. O. Konorov… in Journal of Experimental and Theoretical Ph… (2004)

Article

SANS and TEM investigation of laser-synthesized photoluminescent Si nanoparticles

Laser-synthesized photoluminescent Si nanopowders, of interest for application in optoelectronics, have been studied by small-angle neutron scattering (SANS) and transmission electron microscopy (TEM) to chara...

S. Botti, R. Coppola, F. Gourbilleau, R.P. May, R. Rizk, M. Valli in Applied Physics A (2002)

Article

MoS2 nanoparticles produced by laser induced synthesis from gaseous precursors

E. Borsella, S. Botti, M. C. Cesile, S. Martelli… in Journal of Materials Science Letters (2001)

Article

Energy Transfer in Erbium-Doped Silicon Nanoclusters: A Comparison of Silicon-Rich Silica and Silicon Nanopowders

A number of groups have demonstrated an efficient excitation transfer mechanism in erbium-doped crystalline and porous silicon. It has been postulated that this is a carrier-mediated transfer, which points to ...

A. J. Kenyon, S. Botti, C. E. Chryssou, P. F. Trwoga… in MRS Online Proceedings Library (1999)

Article

Light scattering diagnostics of silicon particle growth in CO2 laser-driven reactions

laser-induced pyrolysis of silane in a flow reactor, based on scattering of He-Ne laser light by a particulate in the reaction flame. The scattering and extinction measurements have been used to measure nucle...

S. Botti, A. Celeste in Applied Physics A (1998)

Article

Nanocrystalline silicon with twin faults and reduced Debye temperature

W. Vogel, S. Botti, S. Martelli in Journal of Materials Science Letters (1998)

Article

Synthesis of TiC and SiC/TiC nanocrystalline powders by gas-phase laser-induced reaction

In the development of advanced ceramic nanocomposites, the production of titanium-based nanopowders has assumed importance, especially since recent results showed that mechanical properties of SiC matrices cou...

R ALEXANDRESCU, E BORSELLA, S BOTTI, M. C CESILE… in Journal of Materials Science (1997)

Article

Synthesis of aluminum oxide-based ceramics by laser photoinduced reactions from gaseous precursors

Laser-driven synthesis of Al₂O₃ based ceramic powders from gaseous precursors has been accurately investigated. Different concentrations of the reactant gaseous precursors are shown to influence both the process ...

R. Alexandrescu, E. Borsella, S. Botti, M. P. Cesile… in Journal of Materials Research (1997)

Article

Photoluminescence from oxidised Si nanoparticles produced by CW CO₂ laser synthesis in a continuous-flow reactor

Abstracts are not published in this journal

E. BORSELLA, S. BOTTI, M. CREMONA, S. MARTELLI… in Journal of Materials Science Letters (1997)

Article

Kennedy's disease: clinical and molecular study of two Italian families

Kennedy's disease, or spinal and bulbar muscular atrophy (SBMA), is a rare X-linked motoneuron disorder with variable signs of androgen insensitivity. It is associated with the expansion of a trinucleotide CAG...

Dr. D. Pareyson, B. Castellotti, S. Botti… in The Italian Journal of Neurological Scienc… (1995)

Article

Spin-orbit coupling, spin-lattice relaxation, and spin-memory studies ofF-center-molecular-ion pairs in alkali halides

The spin-orbit parameter Δ, spin-lattice relaxation timeT ₁, and spin-mixing parameter ɛ ofF _H(OH⁻) andF _H(CN⁻) centers in several alkali halides have been studied ...

G. Baldacchini, S. Botti, U. M. Grassano, F. Luty in Il Nuovo Cimento D (1993)

Article

Composite Si/C/N powder production by laser induced gas phase reactions

Ultrafine amorphous Si/C/N ternary powders have been prepared in a CO₂ laser assisted process. We demonstrate the possibility to drive the C/N ratio in the powder by properly choosing the experimental conditions ...

E. Borsella, S. Botti, R. Fantoni, R. Alexandrescu… in Journal of Materials Research (1992)

Article

Composite ceramic powders obtained by laser induced reactions of silane and amines

Ultrafine, ternary (Si/C/N) ceramic powders have been produced after CO₂ laser initiated reactions between silane and mono- or dimethylamine. Various spectroscopic diagnostics and chemical analyses, including ir ...

R. Alexandrescu, I. Morjan, E. Borsella, S. Botti… in Journal of Materials Research (1991)

Article

Magnetic circular dichroism in the absorption of theF _A centre in KCl doped with Li and Na

The spin-orbit structure ofF _A centres in KCl:Li and KCl:Na have been studied by means of the magnetic circular dichroism. Due to theirC _4V symmetry theF _A centres ...

G. Baldacchini, S. Botti, U. M. Grassano in Il Nuovo Cimento D (1990)

Article

IX Eular Workshop for Rheumatology Research

C. Fournier, B. Texier, G. Chiocchia, M. C. Boissier, D. Herbage… in Clinical Rheumatology (1989)