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Small‐angle X‐ray scattering study of the growth kinetics of CuCl nanocrystals in NaCl
Author(s) -
Kranold R.,
Kriesen S.,
Haselhoff M.,
Weber H.J.,
Goerigk G.
Publication year - 2003
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889803001833
Subject(s) - ostwald ripening , nucleation , spinodal decomposition , nanocrystal , volume fraction , critical radius , scattering , materials science , dissolution , crystallization , chemical physics , crystallography , small angle scattering , chemistry , thermodynamics , phase (matter) , optics , nanotechnology , physics , composite material , spheres , organic chemistry , astronomy
The precipitation of CuCl nanocrystals in a NaCl matrix has been studied by time‐resolved small‐angle X‐ray scattering. The experimental results suggest that the nucleation process is accelerated by lattice defects of the matrix remaining in the NaCl lattice after the dissolution of previous nanocrystals at high temperature. The evolution of structural parameters calculated from the scattering curves, such as volume fraction, mean radius and particle number density of the nanocrystals, is discussed in terms of a classical phase separation process but with specific concern for the effect of elastic strains. It was found that Ostwald ripening is effective during the whole period of observation. The effect of elastic strains results in an increase of the critical radius and a decrease of the coarsening rate. The results of the scattering experiments confirm the miscibility gap data determined by exciton spectroscopy.