Slow energy relaxation of macromolecules and nanoclusters in solution |
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Authors: | Piazza F De Los Rios P Sanejouand Y-H |
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Institution: | Institute of Theoretical Physics-LBS, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland. Francesco.Piazza@epfl.ch |
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Abstract: | Many systems in the realm of nanophysics from both the living and the inorganic world display slow relaxation kinetics of energy fluctuations. In this Letter we propose a general explanation for such a phenomenon, based on the effects of interactions with the solvent. Within a simple harmonic model of the system fluctuations, we demonstrate that the inhomogeneity of coupling to the solvent of the bulk and surface atoms suffices to generate a complex spectrum of decay rates. We show for myoglobin and for a metal nanocluster that the result is a complex, nonexponential relaxation dynamics. |
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