Table 3.

Effect of synthesis on the size and shape of AgNPs.

Types of synthesis		Physical properties of AgNPs (size,shape)	Source
Physical	a) Laser ablation in – ethylene glycol − distilled water − chitosan − aqueous monomers isobutyl acrylate b) Inert gas condensation using helium	Average size of 22.08 nm, spherical shaped Average size of 27.41 nm, spherical shaped Average size of 10.50 nm, spherical shaped Size < 25 nm, spherical shaped Size range from 9 to 32 nm, spherical shaped	Tajdidzadeh et al., 2014, Tajdidzadeh et al., 2014, Tajdidzadeh et al., 2014, Christopher et al., 2011, Raffi et al., 2007
Chemical reduction	a) 3-hydrazino-isatin b) 1-benzyl-3-hydrazino-isatin c) Hydrazine hydrate d) Sodium borohydride e) Trisodium citrate	Size range 18–21 nm, monodispersed spheres Size range of 17–20 nm, monodispersed spheres Size range 8–50 nm, agglomerates of small grains Size < 20 nm, small spherical shaped grains Size range of 100–200 nm, agglomerates of small grains Size range of 35–80 nm, quasi spherical/polygonal	El-Faham., Elzatahry, A., Alothman, Z., Elsayed, E. , 2014, El-Faham., Elzatahry, A., Alothman, Z., Elsayed, E. , 2014, Guzman et al., 2008, Szczepanowicz et al., 2010, Khatoon et al., 2011, Suriati et al., 2014
Green/Bio- synthesis	a)Plants – Cissus rotundifolia leaf extract − Murraya koenigii (curry leaves extract) − Cynara scolymus leaf extract −Berberis vulgaris leaf and root extract −Azadirachta indica leaf extract − Hibiscus cannabinus leaf extract − Phyllanthus emblica fruit extract b) Microbes − Brevibacterium frigoritolerans DC2 − Pseudoduganella eburnea MAHUQ-39 (soil) − thermophilic Bacill-us Sp. AZ1 (hot spring) − Saccharomyces cerevisiae (yeast) − Rhizopus stolonifer (black bread mold) c) Exopolysaccharide (EPS) from Leuconostoc lactis	Size range of 20–40 nm, spherical and oval-shaped Size range of 5–20 nm, spheroidal shaped Diameter range of 200–223 nm, spherical shaped Size range of 30–70 nm, spherical shaped Average diameter around 34 nm, spherical shaped Average size of 9 nm, monodipersed spheres Size range of 19.8–92.8 nm, spherical shaped Size range of 10–30 nm, spherical shaped Size range of 8–24 nm, spherical shaped Size range of 7–31 nm, single/aggregated spherical shaped granules Size range of 5–20 nm, small and spherical shaped Average size of 9.46 ± 2.64 nm, spherical shaped Size range of 30–200 nm, spherical shaped	Al-Ghamdi, 2018, Qais et al., 2019, Erdogan et al., 2019, Behravan et al., 2019, Ahmed et al., 2016, Bindhu and Umadevi, 2013, Masum et al., 2019, Singh et al., 2015, Huq, 2020, Deljou and Goudarzi, 2016, Niknejad et al., 2015, AbdelRahim et al., 2017, Saravanan et al., 2017