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. Author manuscript; available in PMC: 2020 Jan 10.
Published in final edited form as: J Control Release. 2018 Nov 1;293:1–9. doi: 10.1016/j.jconrel.2018.10.033

Fig. 4.

Fig. 4

(a) CLSM images and (b) flow cytometry data of 4T1 cells incubated with Cy5.5MTAs at pH 6.9 and 7.4. Scale bar: 25 μm. (c) The fluorescence intensity of Cy 5.5 accumulation at designed time.