Table 1.
Method of green synthesis | Applied material/organism | Particle size (nm) | Morphology of NPs | Critical point of view | Reference |
---|---|---|---|---|---|
Plant-mediated synthesis | Gloriosa superba | 5 | Spherical | Different kinds of alkaloids acted as stabilizing agents | 33 |
Plant-mediated synthesis | Acalypha indica | 36 | Spherical | Agglomeration of particles were observed due to covalent bonding of the individual particles | 34 |
Plant-mediated synthesis | Aloe vera | 63.6 | Spherical | 35 | |
Fungus-mediated synthesis | Curvularia lunata | 5–20 | Spherical | Enzymes, proteins and heterocyclic derivatives could act as reducing and capping agent | 37 |
Nutrient-mediated synthesis | EW protein | 8.2, 11.7 and 17.3 | Spherical | Being soluble and foam-like in water, EW has several proteins acting as stabilizing agents | 47 |
Nutrient-mediated synthesis | Honey | 23 | Spherical | Follow-up the sol–gel method | 48 |
Biopolymer-mediated synthesis | Agarose | 10.5 | Spherical | Follow-up the sol–gel method | 51 |
Biopolymer-mediated synthesis | Starch | 6 | Spherical | Providing ultrafine product | 27 |
Biopolymer-mediated synthesis | Gum | 10 | Spherical | 27 | |
Biopolymer-mediated synthesis | Dextran | 5 | Spherical | pH-dependent response | 57 |
Biopolymer-mediated synthesis | Polyethylene glycol | ~2 | Spherical | Providing a framework for designing a hybrid metal oxide sol | 58 |
Biopolymer-mediated synthesis | Chitosan | ~10 | Spherical | Applicable in food borne mycoplasma detection | 61 |
Abbreviations: EW, egg white; NPs, nanoparticles.