Nanoparticle Size of Colloidal Silver

In general, silver colloids are prepared by liquid phase reduction. The reducing agent type and conditions can be varied to obtain a silver colloid of a given particle size range. Silver colloidal particles can be stabilized by coating their surfaces with polymers to form 3D barriers (steric stabilization) or using the reduction potential of silver to impose electric repulsive forces between particles (electrostatic stabilization).