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TEM images of AuPd NPs of varied Au concentrations capped with selected capping molecules. The scale bar is 20 nm in all the images. The Au concentration and types of capping molecules are noted in the figure.
Experimental -edge EXAFS and theoretical fits of the nine AuPd samples. The Au concentration and types of capping molecules are also displayed in the figure.
(a) A plot of CN vs number of atoms in the magic-number model clusters (square) and the third-order exponential decay fit (line); (b) An illustration of the CN of each type of surface atoms of the model cluster; [(c) and (d)] Schematic illustrations of the 4.2 nm AuPd model clusters with a core-shell (c) and a homogeneous alloy (d) structure used for the theoretical calculations.
The –XANES displayed by vertically shifting the spectra to compare the profiles (a) and without vertical shift to compare the white line intensity (b).
Structural information of AuPd NPs from EXAFS and TEM.
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