Research Article
Modification of Mesoporous Silica Surface by Immobilization of Functional Groups for Controlled Drug Release
Figure 3
FT-IR spectra obtained for (a) bare MSNs, (b) TMPAC-MSNs, (c) TMPAC-MSNs-NH2, (d) TMPAC-MSNs-SH, and (e) TMPAC-MSNs-.