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(A) DFM-CCD image of AgNPs before the oxidation at an exposure time of 100 ms. (B) DFM-CCD images of AgNPs after 10.0 s at −0.3 V at an exposure time of 100 ms. (C) DFM-CCD images of AgNPs after 10.2 s at 0.8 V at an exposure time of 100 ms. (D) Difference image of (B,C).
