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Abstract
Structural characteristics of nanocomposite series consisting of iron oxide nanoparticles (NPs) embedded in the regular pores of amorphous silica matrix (SBA-15) were investigated by means of small angle neutron scattering (SANS). By virtue of unique neutron properties, insight into the inner structure and matter organization of this kind of systems was facilitated for the first time. Based on rigorous experimental support, fundamental model describing the neutron scattering intensity distribution was proposed by assuming general composite structural features. Model application to SANS data confirmed the presence of iron oxide NPs in the body of examined matrices, providing additional information on their shape, concentration and size distribution. Scattering superposition principle employed in the model conception allows for tailoring its fundamental characteristics, and renders it a potent and versatile tool for a wide range of applications.
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Details
1 P. J. Šafárik University, Department of Solid State Physics, Košice, Slovakia
2 P. J. Šafárik University, Department of Solid State Physics, Košice, Slovakia; Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Dubna, Russia
3 Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Dubna, Russia; Comenius University in Bratislava, Department of Physical Chemistry of Drugs, Bratislava, Slovakia
4 Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Dubna, Russia; Moscow Institute of Physics and Technology, Institutsky per. 9, Dolgoprudny, Moscow Region, Russia
5 Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Dubna, Russia
6 P. J. Šafárik University, Department of Inorganic Chemistry, Košice, Slovakia