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                            Library & Multimedia
 Single Molecule SERS Spectral Blinking and Vibronic Coupling
NCJ Number
              304212
Journal

*Journal of Physical Chemistry C* Volume: 115 Issue: 11 Dated: 2011 Pages: 4540-4545
Author(s)
          John R. Lombardi;
                        Ronald L. Birke;
                        Gilad Haran
Date Published

2011
Length
              6 pages
Annotation
              This project examined the time evolution of spectral blinking behavior of single molecule surface-enhanced Raman spectra (SERS).
Abstract
              For the molecules examined, it was found that the on−off behavior of the spectral lines was not always in tandem and that the spectral lines can be divided into subsets with separate tandem blinking behavior. One group, despite fluctuating somewhat, was relatively steady in intensity, until they either abruptly or sometimes more gradually disappeared. A second group blinked more sharply, on briefly or off for a longer period. They appeared more erratically and often were more intense while on. The former set of lines was found to obtain most of their intensity through Franck−Condon terms in the polarizability expression, while lines for which the Raman intensity is correlated with vibronic coupling tended to blink with sharper on−off differences. These observations are interpreted in terms of the theory of vibronic coupling as applied to SERS. (publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2006-DN-BX-K034


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Award
        Development of Advanced Raman Spectroscopy Methods and Databases for the Evaluation of Trace Evidence and the Examination of Questioned Documents
    
  
  
Date Published: January 1, 2011
    
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