Open AccessTrapping of cubic ZnO nanocrystallites at ambient conditions
Author(s) -
F. Decremps,
Julio PellicerPorres,
F. Datchi,
J. P. Itié,
A. Polian,
F. Baudelet,
J.Z. Jiang
Publication year - 2002
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.1527696
Subject(s) - nanocrystalline material , crystallite , x ray absorption spectroscopy , materials science , metastability , ambient pressure , absorption spectroscopy , analytical chemistry (journal) , diffraction , powder diffraction , x ray crystallography , crystallography , trapping , crystal structure , chemistry , nanotechnology , thermodynamics , optics , metallurgy , physics , organic chemistry , chromatography , ecology , biology
Dense powder of nanocrystalline ZnO has been recovered at ambient conditions in the metastable cubic structure after a heat treatment at high pressure (15 GPa and 550 K). Combined x-ray diffraction (XRD) and x-ray absorption spectroscopy (XAS) experiments have been performed to probe both long-range order and local crystallographic structure of the recovered sample. Within uncertainty of these techniques (about 5%), all the crystallites are found to adopt the NaCl structure. From the analysis of XRD and XAS spectra, the cell volume per chemical formula unit is found to be 19.57(1) and 19.60(3) A3, respectively, in very good agreement with the zero-pressure extrapolation of previously published high-pressure data.
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