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                            Library & Multimedia
 ZnO Nanoparticle Size-dependent Excitation of Surface Raman Signal from Adsorbed Molecules: Observation of a Charge-Transfer Resonance
NCJ Number
              255361
Journal

*Applied Physics Letter* Volume: 91 Dated: 2007 Pages: 221106
Author(s)
          Zhihua Sun;
                        Bing Zhao;
                        John R. Lombardi
Date Published

2007
Length
              0 pages
Annotation
              This article reports on a project that found by observing the Raman intensity of several molecules (4-mercaptopyridine and 4-mercaptobenzoic acid) adsorbed on the surface of ZnO nanocrystals as a function of particle size in the range of 18–31nm diameter, a large increase in intensity near 28nm occurred.
Abstract
              This is an indication of a size-dependent charge-transfer resonance. This effect is interpreted by the authors as due to formation of a charge-transfer complex between a surface-bound exciton and the adsorbed molecule. (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, 2007
    
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