Figure 2

Images of SEM for (a) CA/AC3.7, (b) rC/AC3.7, (c) rC/AC3.7-EDTA and (d) rC/AC3.7-EDTA-MB; the images were taken at 15 kV and magnification of 5000 × .

Images of SEM for (a) CA/AC3.7, (b) rC/AC3.7, (c) rC/AC3.7-EDTA and (d) rC/AC3.7-EDTA-MB; the images were taken at 15 kV and magnification of 5000 × .