R. Porte, D. S. Moreno, M. Striano, M. Munñoz, J. García-Ramos, S. S. Cortés, E. Koudoumas
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Laser Ablation Studies of Deposited Silver Colloids Active in SERS
Laser ablation of deposited silver colloids, active in SERS, is carried out at three different laser wavelengths (KrF, XeCl and Nd:YAG at λ = 248, 308 and 532 nm respectively). Emission form excited neutral Ag and Na atoms, present in the ablation plume, is detected with spectral and temporal resolution. The expansion velocity of Ag in the plume is estimated in ~1×104m s−1. Low-fluence laser ablation of the colloids yields ionized species that are analyzed by time-of-flight mass spectroscopy. Na
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