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Characterization of Ag2S QDs at molar ratio of 12: 5. (a) XRD patterns (with and without ultrasound). (b) The full spectrum of XPS and the corresponding high resolution spectrum of Ag2S QDs under ultrasonic radiation at room temperature. (c) Ag 3d. (d) S 2p. (Qc = 75 μL / min, Qd = 37.5 μL / min). (e) The XPS image of S2- at 12: 7.
