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. 2017 Jan 18;4(1):3. doi: 10.3390/bioengineering4010003

Figure 4.

Figure 4

Mesoporous silica nanoparticle (MSN)-doxorubicin (DOX) via hydrazone bond on the surface. The acid-labile bond is cleaved at acidic pH, and the drug is released only in the desired area.