Amoruso, Salvatore and Bruzzese, Riccardo (2007) An analysis of the dependence on photon energy of the process of nanoparticle generation by femtosecond laser ablation in a vacuum. [Pubblicazione in rivista scientifica]

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Tipologia del documento: Pubblicazione in rivista scientifica
Lingua: English
Titolo: An analysis of the dependence on photon energy of the process of nanoparticle generation by femtosecond laser ablation in a vacuum
Autori:
AutoreEmail
Amoruso, Salvatore[non definito]
Bruzzese, Riccardo[non definito]
Autore/i: S. AMORUSO; R. BRUZZESE ; WANG X; NEDIALKOV N.N; ATANASOV P.A
Data: 2007
Numero di pagine: 0
Dipartimento: Scienze fisiche
Numero identificativo: 10.1088/0957-4484/18/14/145612
Titolo del periodico: NANOTECHNOLOGY
Editore: IOP Publishing Limited:Dirac House, Temple Back, Bristol BS1 6BE United Kingdom:011 44 117 9297481, EMAIL: custserv@iop.org, INTERNET: http://www.iop.org, Fax: 011 44 117 9294318
Data: 2007
Volume: 18
Intervallo di pagine: 145612-1-145612-6
Numero di pagine: 0
Numero identificativo: 10.1088/0957-4484/18/14/145612
Depositato il: 20 Ott 2010 08:35
Ultima modifica: 30 Apr 2014 19:42
URI: http://www.fedoa.unina.it/id/eprint/6903

Abstract

The dependence on laser wavelength of the process of nanoparticle generation by ultrashort laser ablation of solid matter in a vacuum has been investigated both experimentally and theoretically. The study has been carried out for a Ni target by using laser pulses of ≈300 fs duration at two different laser wavelengths: in the visible (λ = 527 nm) and ultraviolet (λ = 263 nm), respectively. The size distribution of the nanoparticles, which is quite broad in the case of visible light, becomes significantly narrower and slightly shifts towards smaller sizes for ultraviolet light. Molecular dynamics simulations confirm the dependence of the process on the laser wavelength by showing that the laser photon energy affects the material relaxation and, thus, the nanoparticle generation process. This, in turn, indicates that the photon energy can be used as an effective parameter to control the nanoparticle size distribution in femtosecond laser ablation of solid matter.

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