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Copyright 2004 by Marcel Dekker, Inc. All Rights Reserved.

Copyright 2004 by Marcel Dekker, Inc. All Rights Reserved.

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Figure 5 (a) Femtosecond transient absorption spectra of 15-nm spherical goldnanoparticles in aqueous solution taken at different delay times after excitation with400-nm femtosecond laser pulses (solid lines). Also shown is the ground-stateabsorption spectrum (dotted line). (b) The recovery dynamics of a plasmon bleach at520 nm is fit to a two-exponential decay. Two time constants derived from this fit areattributed to electron–phonon (3.1 ps) and phonon–phonon (90 ps) interactions.<strong>Copyright</strong> <strong>2004</strong> <strong>by</strong> <strong>Marcel</strong> <strong>Dekker</strong>, <strong>Inc</strong>. <strong>All</strong> <strong>Rights</strong> <strong>Reserved</strong>.

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