Biosynthesis of iron oxide nanoparticles using bacteria.

Bacteria	Salt	Size	Shape	Applications	Ref.
Bacillus subtilis	FeCl3 (2 mM)	12–32 nm	Spherical	Cytotoxicity assay	196
Bacillus subtilis	FeCl3 (2 mM)	3.6 nm	Spherical	—	196
Proteus vulgaris	FeCl3 (3 mM)	20–30 nm	Spherical	Antibacterial, antioxidant	197
Enterococcus faecalis	FeCl2·4H2O (0.1 M), FeCl3·6H2O (0.2 M)	15.4 nm	Cubical, hexagonal, brick, and irregular	Heavy metal removal and cytotoxic	106
Enterococcus faecalis	FeCl-.6H–O (1 M)	48.77–55.55 nm	Cubic	Antibiofilm	198
Bacillus coagulans	FeCl3·6H2O, FeCl2·4H2O (2 : 1 M)	15.18 nm	Cubic	Antibacterial	199
Aeromonas hydrophila	FeCl2 (5 mmol), FeCl3 hexahydrate (10 mmol)	8–12 nm	Spherical	Antibacterial	200