Table 4.

Alga-mediated synthesis of AgNPs

Reducing agent: alga strain	Characterization	Size	Shape	Algae type	Macro/microalgae	Reference
Sargassum wightii Greville	UV, TEM, XRD, FTIR	TEM (8−27 nm)	Spherical	Brown	Macroalgae	201
Caulerpa racemosa	UV, TEM, FTIR, XRD	TEM (10 nm)	Spherical and triangular	Green	Macroalgae	202
Polysaccharide extracted from algae: Pterocladia capillacae, Jania rubins, Ulva fasciata, Colpmenia sinusa	UV, TEM, FTIR	TEM (7, 7, 12, and 20 nm for U. fasciata, P. capillacae, J. rubins, and C. sinusa, respectively)	Spherical	Red and green	Macroalgae	203
Chaetomorpha linum	UV-vis, SEM, FTIR	SEM (3–44 nm, average ~30 nm)	Varied	Green	Macroalgae	204
Chaetoceros calcitran, Chlorella salina, Isochrysis galbana, Tetraselmis gracilis	UV, SEM	SEM (53.1–73.9 nm)	NA	Green	Microalgae	199
Gelidium amansii	UV-vis, SEM, FTIR	SEM (27–54 nm)	Spherical	Red	Macroalgae	205

Abbreviations: NPs, nanoparticles; UV-vis, ultraviolet-visible (spectroscopy); TEM, transmission electron microscopy; SEM, scanning electron microscopy; XRD, X-ray diffraction; FTIR, Fourier-transform infrared (spectroscopy).