Figure 1.
SEM images of IONPs (A), IONPs@SiO2 (B), MCM-PA@B (C–G), IONPs@SiO21:PA@B1 (C), IONPs@SiO21:PA@B3 (D), IONPs@SiO21:PA@B5 (E), IONPs@SiO23:PA@B5 (F), and IONPs@SiO25:PA@B5 (G).
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