MNPs/MONPs | Algae used | Metal precursor (medium) used | Morphology | Biomedical application | Findings | References |
---|---|---|---|---|---|---|
Fe2O3/Fe3O4 | Ulva lactuca | Iron (III) chloride | Spherical 20 and 40 nm | Anticancer, anti-diarrheal activity | Significant cytotoxicity was observed in cancer cell lines treated with NPs at higher concentrations (50 mg/mL and 100 mg/mL). The zone of inhibition by Ulva lactuca-mediated NPs against E. coli and S. aureus were 29 ± 1 mm and 17 ± 2 mm, respectively | [182] |
Colpomenia sinuosa, Pterocladia capillacea | Iron (III) chloride | Spherical 11.24–33.71 nm, 16.85–22.47 nm | Antibacterial, antifungal | Fe3O4 NPs demonstrated superior antifungal efficacy against A. flavus (9 mm) and F. oxysporum (6 mm) in contrast to Fe3O4 NPs derived from P. capillacea (7 & 5 mm) | [183] | |
Gracilaria edulis | Iron (III) chloride | Cubic 20 nm–26 nm | Antibacterial, antifungal | NPs inhibited P. aerogenosa (bacteria), A. nidulans, and C. albicans (fungi) | [184] | |
Oscillatoria limnetica | Iron chloride hexahydrate | Trigonal rhombohedral | Antibacterial, antioxidant, anticancer | Maximum antifungal activity was observed against Aspergillus versicolor (MIC value 27 µg/mL and LD50 value 47 µg/mL). B. subtilis was the most suspected (MIC: 14 µg/mL) and E. coli was the least suspected strain (MIC 35 µg/mL) | [185] | |
CuO | Bifurcaria bifurcata | Copper (II) sulfate | Spherical 20.66Â nm | Antibacterial | Zones of inhibition for S. aureus and Enterobacte aerogenes was 14Â mm and 16Â mm, respectively | [186] |
Sargassum polycystum | Copper solution | – | Antibacterial, antifungal, anticancer | More antibacterial activity was shown in P. aeruginosa (15 ± 0.5 mm) than Shigella dysenteriae (6 ± 0.5 mm). IC50 value for NPs was 61.25 μg/mL | [178] | |
Spirulina platensis | Copper (II) acetate | 30–40 nm | Antibacterial | Maximum zone of inhibition (28.0 ± 0.41 mm) was shown against P. vulgaris | [187] | |
ZnO | S. marginatum | Zinc nitrate hexahydrate | 80–126 nm | Antiviral | NPs demonstrated 99.09% anti-dengue activity in C6/36 cell line | [188] |
Sargassum muticum | Zinc acetate dihydrate | – | Anticancer |  > 55% cells survived at 175 μg/mL of ZnO NPs. Cell viability was < 40% 175 μg/mL. HepG2 cell survival percentage was 4.5%. Maximum radical scavenging was observed up to 89% at 2800 μg/mL with an EC50 value of 600 μg/mL | [189] | |
Anabaena cylindrica | Zinc sulfate | Rod 40–60 nm | Anticancer, antibacterial | ZnO NPs had 50% reduction in cellular viability at 3% dose, while commercial ZnO showed an ED50 at 6% of doses. Zone of inhibition against P. aeruginosa and S. aureus was 10–22 mm and 9–12 mm, respectively | [190] | |
Ag | Caulerpa racemosa | Silver nitrate | Spherical/triangular 10 nm | Antibacterial | Zone of inhibition against P. mirabilis was 14 mm at 15 µL and 7 mm against S. aureus at 5 µL | [191] |
Spirulina platensis Oscillatoria sp | Silver nitrate | Spherical 14.42–48.97 nm | Antiviral | 90% reduction in cytopathic effect of HSV-1 by Ag NPs, with a high reduction rate (49.23%) | [192] | |
Pithophora oedogonia | Silver nitrate | Cubical/hexagonal 25–44 nm | Antibacterial | Largest zone of inhibition observed against P. aeruginosa (17.2 mm) followed by E. coli (16.8 mm) | [193] | |
Caulerpa serrulata | Silver nitrate | Spherical 10 ± 2 nm | Antibacterial, catalytic | Maximum inhibition zone (21 mm at 75 μL) was observed against E. coli, while lowest inhibition zone (10 mm at 50 μL) was shown for S. typhi | [194] | |
Au | Spirulina platensis Oscillatoria sp. | Tetrachloroauric (III) acid trihydrate | Octahedral/Pentagonal/triangular 15.60–77.13 nm | Antiviral | 90% reduction in cytopathic effect of HSV-1 by Au NPs at 31.25 μL with a high reduction rate of Au NPs (42.75%) | [192] |
Sargassum wightii | Chloroauric acid | – | Antiviral | Au NPs showed cell viability of 93.12–85.18% | [195] | |
Gracilaria corticata | Chloroauric acid | Spherical 45–57 nm | Antimicrobial, antioxidant | Antibiotic-conjugated Au NPs showed antimicrobial activity against E. coli (24 mm) and E. aerogenes (21 mm). S. aureus (19 mm) showed the moderate antimicrobial activity | [196] | |
Padina gymnospora | Gold salt | Spherical/triangular/hexagonal 9–21 nm | Anticancer | 50% reduction in cell viability in HepG2 (IC50 value of 51.9 nM) was recorded | [197] |