Application of Starch-Stabilized Silver Nanoparticles as a Colorimetric Sensor for Mercury(II) in 0.005 mol/L Nitric Acid

Figure 6

(a) TEM image (scale bar is 20 nm) and (b) corresponding SAED pattern of starch-coated silver nanoparticles after treatment by Hg²⁺ solution at a concentration of 500 μg L⁻¹ in the presence of 0.005 mol L⁻¹ HNO₃.