Figure 4
From: Nanodiamonds act as Trojan horse for intracellular delivery of metal ions to trigger cytotoxicity
Release profile of Cu 2+ from ND-Cu 2+ complex at different pH values. a: Desorption amount of Cu2+ from ND-Cu2+ complexes in different pH values: pH 7.4 and pH 5.5 within 24 h. b: The most stable structures of the ND-Cu2+ complex at high and low pH (denoted by ND-Cu2+ and NDH-Cu2+, respectively) obtained by theoretical computation. c: Molecular modeling illustrations for the adsorption of Cu2+ on ND aggregates at high pH and low pH.