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A total scattering Debye function analysis study of faulted Pt nanocrystals embedded in a porous matrix
Author(s) -
Bertolotti Federica,
Moscheni Daniele,
Migliori Andrea,
Zacchini Stefano,
Cervellino Antonio,
Guagliardi Antonietta,
Masciocchi Norberto
Publication year - 2016
Publication title -
acta crystallographica section a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.742
H-Index - 83
ISSN - 2053-2733
DOI - 10.1107/s205327331601487x
Subject(s) - nanoclusters , nanocrystal , scattering , materials science , nanoporous , debye function , matrix (chemical analysis) , debye model , anisotropy , condensed matter physics , function (biology) , porosity , debye length , nanotechnology , composite material , physics , optics , quantum mechanics , ion , evolutionary biology , biology
Faulted face‐centred cubic platinum nanocrystals, grown within a nanoporous silica matrix, have been extensively characterized by the Debye function analysis method applied to wide‐angle synchrotron X‐ray total scattering data. A method for building databases of sampled interatomic distances of weakly faulted materials is proposed, maintaining statistical significance and allowing complete populations of differently sized and shaped nanocrystals to be used within the DEBUSSY approach. This study suggests that anisotropic Pt nanoclusters are formed in the presence of a shape‐directing (templating) agent, and tentatively describes the effects of post‐synthetic temperature treatments on fault probability, size, shape and dispersion of the nanocrystal populations. Surface relaxation effects are also observed in the smallest particles.