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(A) DFM-CCD image of AgNPs before the reaction at an exposure time of 2,000 ms. (B) DFM-CCD image of AgNPs after the reaction at an exposure time of 2,000 ms. (C) HSI-DFM image of AgNPs before the reaction at an exposure time of 1,000 ms. (D) HSI-DFM image of AgNPs after the reaction at an exposure time of 1,000 ms. The scale bar is identical for all images.
