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    STUDIA PHYSICA - Ediţia nr.2 din 2004  
         
  Articol:   STUDY OF MATERIALS NANOSTRUCTURE BY SMALL ANGLE NEUTRON SCATTERING.

Autori:  ADÉL LEN, LÁSZLÓ ROSTA, ESZTER RÉTFALVI, PÉTER HARMAT, MASSIMO ROGANTE. 		 
       
         
  Rezumat:  The small angle neutron scattering (SANS) method is a technique for studying structural features from 1 to 100 nm in size in various materials such as porous media, polymers, solutions of micelles, membranes, ceramics, metals, etc. The very low energies of thermal neutrons allow them to penetrate in most materials without destructing them. The possibility to substitute hydrogen for deuterium makes SANS a unique technique for investigating macromolecular structures in synthetic and biological polymers. The SANS technique includes the determination of void sizes and their distributions in porous media as well as the investigation of particle agglomeration and evolution of pores during sintering. SANS is also useful for the understanding of the thermodynamics of two-phase systems. In this paper some examples are presented; the different structure investigations were performed recently at the Budapest Neutron Center at Yellow Submarine SANS spectrometer.  
         
     
         
         
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