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. Author manuscript; available in PMC: 2016 Jan 14.
Published in final edited form as: ACS Appl Mater Interfaces. 2015 Aug 19;7(34):19295–19305. doi: 10.1021/acsami.5b05347

Figure 4.

Figure 4

(a) Fluorescence spectra of DOX, HCPT, and HD NPs (20 μM DOX and 5 μM HCPT). λex (HCPT) = 383 nm. λex (DOX) = 475 nm. (b) Changes in the fluorescence spectra of 20 μM HD NPs (20 μM DOX and 5 μM HCPT) when dispersed in pH 7.4 and pH 5.0 PBS buffer. λex (HCPT) = 383 nm. λex (DOX) = 475 nm. (c) Fluorescence pictures and Tyndall effect of 1 (20 μM HD NPs in PBS buffer, pH 7.4) and 2 (20 μM HD NPs in PBS buffer, pH 5.0).