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Fig. 3 | Nanoscale Research Letters

Fig. 3

From: Chitosan-capped enzyme-responsive hollow mesoporous silica nanoplatforms for colon-specific drug delivery

Fig. 3

a The corresponding ξ potentials of HMSS, HMSS–NH2, HMSS–N=N–COOH, and HMSS–N=N–CS; b The TGA curves of HMSS–NH2, HMSS–N=N–COOH, and HMSS–N=N–CS (the inset: the photograph of (a) HMSS–N=N–COOH and (b) HMSS–NH2); c Size distribution of HMSS, HMSS–NH2, and HMSS–N=N–CS inset: the corresponding PDI values of nanoparticles; and d FT-IR spectra of HMSS–NH2, HMSS–N=N–COOH, HMSS–N=N–CS, and CS

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