Fig. 3
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XANES spectra (a) at the Co K edge and (b) at the Pt L3 edge for a sequentially deposited Pt@Co3 (light-orange line) sample, a codeposited PtCo3 sample (dark-violet line) indicating the A, B1, B2 and C features. The XANES spectrum of a Co3Pt alloyed bulk material is shown for comparison (pink dashed line). The inset shows an enlargement of the A shoulder for the two NP samples.
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