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UV-Vis absorbance of silver nanoparticles solutions by time, using 1 mmole/L AgNO3 with 20 g/L NaOH at 60°C. (a) 1 g/L starch, (b) 3 g/L starch, and (c) 6 g/L starch. (d) UV-Vis absorbance of silver nanoparticles solutions by using different concentrations of maize starch, using 1 mmole/L AgNO3 with 20 g/L NaOH at 60°C for 60 minutes.
