Synthesis of Silver Nanoparticles by using Sodium Borohydride as a Reducing Agent

Silver nanoparticles easily interact with other particles and increase their antibacterial efficiency moreover have received considerable attention due to their attractive physical, chemical and optical properties. The optical properties of silver nanoparticles are highly dependent on the nanoparticle diameter and refractive index near the nanoparticle surface. Silver nanoparticles are extraordinarily efficient at absorbing and scattering of light due to its optical properties. These particles were synthesized by the chemical reduction method of AgNO3 using NaBH4. The borohydride anions were adsorbed onto silver nanoparticles and addition of PVP prevented the aggregation of particles. A yellow colour was given by the silver nanoparticle solution using a spectrophotometer that had Surface Plasmon Resonance (SPR) at 386 nm. The silver nanoparticles were estimated to be 10 to 20 nm in diameter.