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Characterization studies of Pt NPs. (A) TEM images of Pt NPs. Scale bar: 100 nm; 30 nm. (B) Particle size distribution of Pt NPs. N = 126. The solid black line represents the fitted distribution function: Y = 32.32 × exp(−0.5 × ((X − 3.369)/0.9812)2). (C) X-ray powder diffraction pattern of Pt NPs. (D) UV-vis absorption spectra of Pt NPs with different concentrations. (E) Zeta potential of Pt NPs.
