Lévy statistics of vibrational mode fluctuations of single molecules from surface-enhanced Raman scattering.
Surface-enhanced Raman spectra of a single Fe-protoporphyrin IX molecule display drastic fluctuations in frequency and intensity. When analyzed in their temporal evolution, the vibrational modes of the molecule undergo an on-off switching behavior that is shown to follow a Lévy statistics. Such a time dependent process may encode both the dynamics of the molecule-environment interactions and the intrinsic gating or activation of the mode emission mechanism.
Bizzarri
Anna Rita
AR
Biophysics and Nanoscience Centre, Dipartimento di Scienze Ambientali, Universitá della Tuscia, 1-01100 Viterbo, Italy.
Cannistraro
Salvatore
S
D003102:Colloids / Q000737:chemistry; D058085:Iron Compounds / Q000737:chemistry*; D008665:Metalloporphyrins / Q000737:chemistry*; D011524:Protoporphyrins / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013499:Surface Properties
D003102:Colloids; D058085:Iron Compounds; D008665:Metalloporphyrins; D011524:Protoporphyrins; C028025:protoporphyrin IX