Abstract
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.
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42.62.-b; 61.46.+w; 78.66.-w
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Shafeev, G., Freysz, E. & Bozon-Verduraz, F. Self-influence of a femtosecond laser beam upon ablation of Ag in liquids. Appl. Phys. A 78, 307–309 (2004). https://doi.org/10.1007/s00339-003-2357-4
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DOI: https://doi.org/10.1007/s00339-003-2357-4