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. Author manuscript; available in PMC: 2009 Oct 14.
Published in final edited form as: J Am Ceram Soc. 2009 Jan 1;92(S1):s2–s10. doi: 10.1111/j.1551-2916.2008.02722.x

Fig. 3.

Fig. 3

Snap-tops attached to the surface of mesoporous silica nanoparticles are able to store guest molecules within the pores while intact. Guest molecules are released upon selective cleavage of ester-linked adamantyl stoppers by porcine liver esterase (PLE).