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    STUDIA PHYSICA - Issue no. 2 / 2005  
         
  Article:   THE MEASUREMENT OF THE METAL NANOPARTICLE SIZE.

Authors:  B. BARZ, N. ALDEA, P. MARGINEAN, T.D. SILIPAS, MIHAELA LAZAR, C. DUCU, XIE YANING, HU TIANDOU, LIU TAO, ZHONGHUA WU, FLORICA ALDEA.
 
       
         
  Abstract:  A new theoretical analysis for determining the metal crystallite size and lattice strain from X-ray diffraction line profile broadening is presented. Emphasis is made on the rigorous analysis of the line profiles in terms of Fourier transform. Fermi generalized distribution function for single X-ray line profile approximation is used in order to determine the crystallite size and the lattice strain by the deconvolution technique. The microstructural parameters are obtained by using the Warren and Averbach theory and are included in the general form of the Fourier transform of the true sample. A comparison of microstructural models of the supported gold and nickel catalysts, determined by various analytical approximations, is presented.  
         
     
         
         
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