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Analysis of the Shell Thickness Distribution on NaYF4/NaGdF4 Core/Shell Nanocrystals by EELS and EDS

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journal contribution
posted on 16.12.2015, 18:18 by Keith A. Abel, John-Christopher Boyer, Carmen M. Andrei, Frank C. J. M. van Veggel
The structure and chemical composition of the shell distribution on NaYF4/NaGdF4 core/shell nanocrystals have been investigated with scanning transmission electron microscopy (STEM), electron energy loss spectroscopy (EELS), and energy-dispersive X-ray spectroscopy (EDS). The core and shell contrast in the high-angle annular dark-field (HAADF) images combined with the EELS and EDS signals indicate that Gd is indeed on the surface, but for many of the particles, the shell growth was anisotropic.