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. 2024 Jul 26;14:17210. doi: 10.1038/s41598-024-68007-4

Figure 1.

Figure 1

SEM images of the samples (a) Au–Ag–PSN, (b) Au–Ag–NHA, (c) Ag–PSN, and (d) Ag–NHA. (e) Sketch of the excitation plane. Yellow arrow indicates projection of the metal flux direction onto the sample surface plane.