Figure 4.
Luminescence intensities of the cell membrane and zeta potentials of GC-AuNPs at different pHs. (A) Luminescence intensity of the cell membrane incubated with GC-AuNPs at different pH in PBS or in minimum essential medium (MEM) supplemented with 10% (v/v) fetal bovine serum (FBS) (Inset) respectively. (B) Zeta potentials of G-AuNPs and GC-AuNPs at pH 7.4 and pH 5.3 respectively. Results were presented as mean±SD (n = 6).