Several biological sources are employed in the green synthesis of nanoparticles:
Plants: Plant extracts contain various bioactive compounds that can reduce metal ions to nanoparticles. Algae: Algae produce polysaccharides and proteins that assist in nanoparticle formation. Fungi: Fungi secrete enzymes and metabolites that aid in the reduction and stabilization of nanoparticles. Bacteria: Certain bacteria can bioreduce metal salts to form nanoparticles intracellularly or extracellularly.
