Table 2.

Biological synthesis of AgNPs by various microorganisms

Microorganism	Particle size (nm)	Particle structure and distribution	Maximum absorption wavelength (nm)	References
Bacillus cereus	2–16	Spherical	420	[9]
P. aeruginosa strain BS-161R	8–24	Spherical, anisotropic	430	[26]
P. aeruginosa	20–50	Spherical, monodispersed	455	[1]
P. aeruginosa strain KUPSB12	50–85	Spherical	442	[27]
Aspergillus flavus strain NJP08	10–35	Spherical, monodispersed	421	[11]
Acinetobacter calcoaceticus strain LRVP54	8–12	Crystalline, polydispersed	410–440	[10]
E. coli	20–50	Spherical	400	[28]
Penicillium strain	> 100	Colloidal, polydispersed	440	[24]
P. aeruginosa ATCC 27853	33–300	Spherical	420–430	[14]
Bacillus sp	65–70	Spherical and pseudospherical	420	[29]
A. flavus strain NCIM650	37.3–52.92	nd	420	[30]
Emericella nidulans strain APF4	10–450	Hexagonal, monodispersed	450	[31]
P. aeruginosa	20–100	Crystalline	420–430	[18]