Fig. 4. TEM (a and c) and SEM (b and d) images of AuNPs with application of –0.8 V (vs. Pt quasi-reference) for 5 and 8 min to form Au@CdS NPs. (e) EDX elemental mapping of Au@CdS NP. (f) HR-TEM image of Au@CdS NP.
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