Figure 1.
Representative morphologies of unmodified HMSNs and HMSNs-S-S-Tf@DOX. SEM images of (a) free HMSNs and (b) HMSNs-S-S-Tf@DOX. Scale bar: 300 nm. TEM images of (c) free HMSNs and (d) HMSNs-S-S-Tf@DOX. Scale bar: 100 nm.
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