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. 2020 Aug 21;10(23):10513–10530. doi: 10.7150/thno.49731

Figure 2.

Figure 2

(A) TEM image of HA@CA nanofibers (scale bar: 500 nm). (B) Schematic illustration of the possible formation mechanism of HA@CA nanofibers in aqueous media. (C) UV-vis absorption spectra of CA, HA@CA, HA@CAP and PpIX. (D) Fluorescence emission spectrum of HA@CAP in H2O and PpIX in DMSO. (E) TEM image of HA@CAP nanopaticles (scale bar: 500 nm). (F) The extracellular 1O2 generation of HA@CAP and free PpIX in aqueous solution under laser irradiation. (G) The changes in UV-vis absorption spectra of HA@CA in acidic environment. (H) In vitro release of CA from HA@CAP under different pH conditions (7.4, 6.5 and 5.0). (I) TEM image of HA@CAP in PBS (pH 5.0). Scale bar: 500 nm.