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. 2022 Mar 11;207:114182. doi: 10.1016/j.bios.2022.114182

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Fig. 4 — Current-time curves of Pt NPs with different agglomeration degree in 10 mM N₂H₄ solution: Pt NPs with (A) or without (B) ultrasonic dispersion. (C) Store of Pt NPs at room temperature for one day. (D) Store of Pt NPs at −20 °C for 1 h. Collision frequency (E) and the average current intensity (F) of Pt NPs with different agglomeration degree.