Self-influence of a femtosecond laser beam upon ablation of Ag in liquids

Formation of nanoparticles of either Au or Ag is reported under ablation of metallic targets exposed to radiation of a femtosecond Ti:sapphire laser (wavelength of 810 nm, pulse width of 120 fs) in either water or ethanol. Nanoparticles are characterized by UV-visible spectroscopy and transmission e...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2004-02, Vol.78 (3), p.307-309
Main Authors: Shafeev, G.A., Freysz, E., Bozon-Verduraz, F.
Format: Article
Language:English
Subjects:
Ablation
Ethyl alcohol
Femtosecond
Gold
Laser beams
Lasers
Nanoparticles
Physics
Silver
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Summary:Formation of nanoparticles of either Au or Ag is reported under ablation of metallic targets exposed to radiation of a femtosecond Ti:sapphire laser (wavelength of 810 nm, pulse width of 120 fs) in either water or ethanol. Nanoparticles are characterized by UV-visible spectroscopy and transmission electron microscopy. Nanoparticles of Ag are several times smaller than those of Au at otherwise equal conditions. The effect is attributed to the self-influence of a laser beam via generation of the second harmonics of the laser radiation on Ag clusters and its good matching to the plasmon resonance of Ag.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-003-2357-4