Fig. 1

(a–c) AgNO3 1 mM solution (a), Broth of Spirulina platensis algae extract (b) and AgNPs formation as a positive result: brownish color (c).

(a–c) AgNO3 1 mM solution (a), Broth of Spirulina platensis algae extract (b) and AgNPs formation as a positive result: brownish color (c).