Bacterial Exopolysaccharides as Reducing and/or Stabilizing Agents during Synthesis of Metal Nanoparticles with Biomedical Applications

Figure 3

Proposed mechanism during synthesis of metal nanoparticles by EPSs. Electrostatic attractive forces between functional groups of EPS and metal salts lead to stabilization and reduction of metal ions to form their respective metal nanoparticles capped by the EPSs.