Figure 3
From: Reversibly pH-responsive gold nanoparticles and their applications for photothermal cancer therapy
(A) Red shift of absorption peak accordingly with reducing pH (7.4, 6.5. 6.0 to 5.5). (B) Blue shift of absorption peak with returning to higher pH (5.5, 6.0, 6.5 to 7.4). (C) Sizes, and (D) Zetapotentials of CytC/ssDNA-AuNPs measured during the pH lowering and elevating process. (E) TEM (upper panel) and SEM (lower panel) images of CytC/ssDNA-AuNPs taken at a cycle of pH 7.4 → 6.5 → 5.5 → 7.4 (scale bar: 300 nm). Error bars refer to standard deviations from three replicates.
