The plant extract for the reduction of Au3+ ions to Au0 was prepared by combining thoroughly washed Ennab leaves

The plant extract for the reduction of Au3+ ions to Au0 was prepared by combining thoroughly
washed Ennab leaves (10 g; leaves were collected in the month of June) in a 200 mL Erlenmeyer flask
with sterile DD water (100 mL). The mixture was then boiled for 5 min. In a typical experiment, 5 mL
of the plant extract was added to 1 mM aqueous HAuCl4 solution (45 mL). Reduction of AuCl4
? was
monitored by recording the UV-vis absorption spectrum as a function of time.
The plant extract for the reduction of Au3+ ions to Au0 was prepared by combining thoroughly
washed Ennab leaves (10 g; leaves were collected in the month of June) in a 200 mL Erlenmeyer flask
with sterile DD water (100 mL). The mixture was then boiled for 5 min. In a typical experiment, 5 mL
of the plant extract was added to 1 mM aqueous HAuCl4 solution (45 mL). Reduction of AuCl4
? was
monitored by recording the UV-vis absorption spectrum as a function of time.

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