ACTA

Diffraction Studies of Nanocrystals: Theory and Experiment

B. Palosz^a, E. Grzanka^a,b, S. Gierlotka^a, S. Stelmakh^a, R. Pielaszek^a,b, U. Bismayer^c, J. Neuefeind^d, H.-P. Weber^e and W. Palosz^f
^aHigh Pressure Research Center UNIPRESS Sokołowska 29/37, 01-142 Warsaw, Poland
^bInstitute of Experimental Physics, Warsaw University Hoża 69, 00-681 Warsaw, Poland
^cMineral-Petrographisches Institut, Uni Hamburg Grindelalle 48, 20146 Hamburg, Germany
^dHASYLAB at DESY, Notkestr. 85, 22603 Hamburg, Germany
^eSNBL at ESRF, BP 220, Av des Martyrs, 38043 Grenoble, France
^fUSRA/NASA-Marshall Space Flight Center, Huntsville, Alabama 35812, USA

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Based on theoretical calculations of powder diffraction data it is shown that the assumption of the infinite crystal lattice for small particles is not justified, leads to significant changes of the diffraction patterns, and may lead to erroneous interpretation of the experimental results. An alternate evaluation of diffraction data of nanoparticles, based on the so-called "apparent lattice parameter", alp, is proposed.

DOI: 10.12693/APhysPolA.102.57
PACS numbers: 61.46.+w