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Toxicity evaluation of PEDOT/Zn micromotors. The mouse stomach was treated with PBS buffer (a, b), PEDOT/Zn micromotor (c, d), AuNPs (e, f), and AuNP-loaded PEDOT/Zn micromotors (g, h). At 6 h post-treatment, the mice were sacrificed and sections of the mouse stomach were processed as described in the Methods section and stained with H&E assay (a, c, e, and g) or TUNEL assay (b, d, f, and h). Scale bars, 250 μm.
