Fig. 22. Exosomes isolated from the cell culture medium of MDA-MB-231 cells treated with CNPs (2 mg mL−1) for 2 h and collected after 48 h. Images were acquired with different excitation filter sets: (A) 350 nm, (B) 490 nm, (C) 550 nm and (D) 630 nm. Scale bar: 20 μm, figure reproduced from ref. 53 with permission from Elsevier, copyright 2017.
