In situ GISAXS study of the growth of Pd on MgO(001)
F. Leroy, C. Revenant, G. Renaud, R. Lazzari
TL;DR
This study uses in situ GISAXS to analyze how Pd nanoparticles grow on MgO(001) surfaces at various temperatures, revealing shape evolution and interfacial energy characteristics.
Contribution
It provides a detailed in situ analysis of Pd nanoparticle morphology during growth, including temperature-dependent shape and size evolution, and estimates interfacial energy.
Findings
Pd nanoparticles adopt truncated octahedron shape above 650 K
Interfacial energy is quantified from morphological data
Growth morphology depends on substrate temperature
Abstract
The morphology of growing Pd nano-particles on MgO(001) surfaces have been investigated in situ, during growth, by grazing incidence small angle x-ray scattering, for different substrate temperatures. The 2D patterns obtained are quantitatively analyzed, and the average morphological parameters (shape, size) deduced. Above 650 K, the aggregates adopt their equilibrium shape of truncated octahedron, and the interfacial energy is deduced.
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