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. 2021 Aug 28;13(9):1356. doi: 10.3390/pharmaceutics13091356

Figure 5.

Figure 5

Second derivate IR mappings of Fe3O4@β-CD drop-cast: surface intensity distribution of (a) C-H and CH2 stretching vibrations at 2930 cm−1 and (b) C-O bond stretching vibrations at 1029 cm−1.