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(a) Raman spectra of AgNPs, showing silver peaks on Ag sheet and variation of Ag peaks in regions I, II, and III on laser ablated Ag–S obtained at 50 μJ of input laser energy; (b) variation of average intensity counts in regions I, II, and III on laser-ablated Ag–S; and (c) variation of intensities of 991, 1373, and 1579 cm–1 signature peaks of Ag–O at regions I, II, and III on laser-ablated Ag–S ablated at 50 μJ. “a.u.” stands for arbitrary units in the figure.
