Spectral and kinetic features of the surface plasmon resonance (SPR) for colloids of silver nanoparticles with carboxyalkylated amines complexons are studied by means of a femtosecond pump-probe spectroscopy. In the long-wavelength wing of the plasmon resonance, the additional laser-induced bleaching band was observed. The rise time of the red bleaching band was found to be of few tens of picoseconds and its decay occurred for about 2 ns. The observed SPR changes may be attributed to the fast breaking and restoring back the nanoparticle connected with the laser-associated excitation of electrons and subsequent relaxation of their energy.
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