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. 2021 Jul 13;26(14):4247. doi: 10.3390/molecules26144247

Figure 4.

Figure 4

TEM micrographs (A–C, scale bar 50 nm) and the corresponding size distribution statistical analysis (D–F) of MSNs prepared by injecting TEOS 4.47 mmol (1 mL) at Tinjection = 50 °C ((A,B,D,E) MSN_Het2 and MSN_Het3 samples) or Tinjecttion = 30 °C ((C,F) MSN_Het4 sample) to 50 mL of H2O/Ethyl acetate (50:2 v/v), [CTAB] = 5 mM and [NaOH] 5 mM ((A,D) MSN_Het2) and 13 mM ((B,C,E,F), MSN_Het3, MSN_Het 4). treaction 3 h and tageing 24 h.