| S. No. | Author | Reducing Agent | Operating Conditions | Characterization | Particle Characteristics | Remarks |
| Algae | ||||||
| 1 | Kathiraven et al. (2014) [84] | Filtered aqueous extract of Caulerpa racemosa marine algae | AgNO3 concentration―1 mM, Reaction period―3 hr, Reaction temp―room temp. Extract: 10 ml/90 ml (AgNO3), Motion: static | UV-Vis FTIR TEM XRD | Size―5 - 25 nm Shape―sph, tri. Structure―FCC | Antibacterial action against P. mirabilis and S. aureus |
| 2 | Rajesh et al. (2012) [49] | Ethyl acetate extract of Ulva fasciata | 1 mM, 2 min, room temp. 3 ml/100 ml, Static | UV-Vis FTIR SEM XRD EDX | Size―28 - 41 nm Shape―sph Structure―cryst Nature―PD | Antibacterial action against X. campestrispv malvacearum pathogen |
| 3 | Vivek et al. (2011) [85] | Aqueous filtrate of Gelidiella acerosa | 1 mM, room temp, 10 ml/90 ml, Agitated | UV-Vis FTIR SEM TEM XRD | Size―~22 nm Shape―sph. Structure―FCC Nature―PD | Antifungal against Mucor inicus and Trichoderma reesei |
| 4 | Govindaraju et al. (2009) [86] | Aqueous filtrate of Sargassum wightii | 1 mM, 1 hr, room temp, 10 ml/90 ml, Static | UV-Vis FTIR TEM XRD | Size―8 - 27 nm Shape―sph/variable Structure―cryst | Antibacterial against S. aureus, B. rhizoids, E. coli and P. aeruginosa |
| Bryophyte | ||||||
| 5 | Kulkarni et al. (2012) [47] | Ethanol filtrate of Riccia | 1 mM, 25˚C, dark, 5 ml/1 ml, Agitated | UV-Vis SEM EDS | Shape―cub/triang | Antibacterial against p. aeruginosa |
| 6 | Kulkarni et al. (2012) [47] | Ethanol filtrate of Anthoceras | 0.5 mM, 10 min, room temp. 5ml/1 ml, Static | UV-Vis SEM EDS | Size―20 - 50 nm Shape―cub/triang | Antibacterial activity after incorporation into gauze cloth |
| 7 | Srivastava et al. (2011) [87] | Aqueous and ethanol filtrate of Fissidens minutes | 0.5 mM, 1 hr, room temp. 10 ml/1 ml, Shaken | UV-Vis SEM EDS | Shape―nearly sph | Antibacterial action against E. coli, B. cereus, K. pneumoniae, P. aeruginosa |
| 8 | Kulkarni et al. (2011) [88] | Aqueous filtrate of Anthoceras | 1 mM, 25˚C, dark, 5 ml/1 ml, Agitated | UV-Vis SEM EDS | Size―20 - 50 nm Shape―cub/triang | Antibacterial action against E. coli, B. subtilis, K. pneumoniae, P. aeruginosa |
| Pteridophyte | ||||||
| 9 | John De Britto et al. (2014) [89] | Aqueous filtrate of Pteris argyreae, Pteris confuse and Pteris blaurita | 1 mM, 28 hr, room temp. 5 ml/100 ml, Static, Centrifugation: 25 min at 10000 rpm. |
|
| Antibacterial action against Shigella boydii, Shigella dysenteriae, S. aureus, Klebsiella vulgaris and Salmonalla typhi |
| 10 | Bhor et al. (2014) [90] | Aqueous filtrate of Nephrolepis sexaltata L. fern | 1mM, 4h, 10 ml/90 ml | UV-Vis SEM XRD | Size―avg 24.76 nm Shape―sph. Structure―FCC | Antibacterial against many human and plant pathogens |
| 11 | Sant et al. (2013) [71] | Aqueous filtrate of Adiantum philippense L. | 1 - 10 mM, 30˚C Extract: AgNO3 Ratio-1: 10; 1:100; 1:1000, Agitated | UV-Vis FTIR EDS TEM DLS XRD | Size―10 - 18 nm Shape―anisotropic Structure―FCC Nature―MD | AgNps from medicinally important plants opens spectrum of medical applications. |
| 12 | Nalwade et al. (2013) [91] | Aqueous filtrate of Cheilanthes forinosa Forsk leaf | 1 mM, 4 hr, room temp. 10 ml/90 ml | UV-Vis SEM XRD | Size―~26.58 nm Shape―sph. Structure―FCC
| Antibacterial action against S. aureus and Proteus morgani |
| 13 | Kang et al. (2008) [92] | Aqueous filtrate of Pteridophyta | 1 mM, 12 hr, room temp. 10 ml/100 ml, Static | UV-Vis TEM EDX | Size―20 - 30 nm Shape―sph. | AgNps are stable for 12 months. |
| Gymnosperms | ||||||
| 14 | Jha and Prasad. (2010) [93] | Filtered aqueous-ethanol extract of Cycas leaf | 0.25 M, 10min, room temp. 80 ml/20 ml, Static | UV-Vis TEM XRD | Size―2 - 6 nm Shape―sph. Structure―FCC | The extraction of cycas leaf is done in 50% EtOH as solvent. |
| 15 | Song and Kim. (2009) [19] | Decanted aqueous extract of Pinus desiflora and Ginko biloba leaf | 0.1 - 2 mm, 30 min, 25˚C - 95˚C, 10 ml/190 ml, Static, 20 min (15k rpm) | UV-Vis SEM TEM EDS ICP | Size―15 - 500 nm Shape―sph. Structure―cryst | AgNps were stable for 4 weeks. |
| Angiosperms | ||||||
| 16 | Ashokkumar et al. (2015) [94] | Filtered aqueous extract of Abutilon indicum leaf | 10 mm, 15 min, room temp. 2 to 3.5 ml/30 ml, Static | UV-Vis FTIR FE-SEM TEM XRD FS | Size―7 - 17 nm Shape―sph. Structure―FCC | Antimicrobial action against S. typhi, E. coli, S. aureus, B. substilus |
| 17 | Sadeghi et al. (2015) [45] | Filtered aqueous-methanol extract of Pistacia atlantica seed powder. | 1 mM, 35 min, room temp. 1 ml/10 ml, Shaken,15 min at10 k rpm | UV-Vis FTIR SEM TEM XRD EDAX ZP | Size―10 - 50 nm Shape―sph. Structure―FCC | Stability: 7 - 11 pH range. Antibacterial affect against S. aureus. |