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                            Library & Multimedia
 Simultaneous enhancement of phonons modes with molecular vibrations due to Mg doping of a TiO2 substrate
NCJ Number
              304232

Author(s)
          Xiangxin Xue;
                        et al
Date Published

2013
Length
              5 pages
Annotation
              This article reports on a project in which the Raman behavior of Mg-doped TiO2 (0 percent, 1 percent, 3 percent, and 5 percent) nanoparticles (NPs) prepared by a sol–gel method was investigated.
Abstract
              It was found that the Mg2+ ions were in situ doped into the TiO2 NPs. Normal Raman and surface enhanced Raman scattering (SERS) spectra have been measured. Researchers observed the enhanced Raman intensity of both the adsorbed molecules and the phonon modes of the Mg–TiO2 NPs when 4-mercaptobenzoic acid (4-MBA) was the probing molecule adsorbed on the Mg–TiO2 NPs. The results showed that the Mg doping concentration and the contents of the surface defects play an important role in the synergistic enhanced phenomenon. The performances of these substrates strongly depend on the charge-transfer resonance mechanism, which originates from the electron and energy transfer between the semiconductor's and the molecule's interfaces. (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, 2013
    
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