Yellow color for spherical silver particles was also reported by Jin et al. [6]. They obtained spherical silver particles by injection of NaBH4 solution to an aqueous solution of AgNO3 in the presence of trisodium citrate followed by dropping of BSPP (as particles stabilizing agent. After 70 h irradiation of silver particles, they observed a decrease in intensity of the characteristic surface plasmon band in the UV-vis spectroscopy for the spherical particles at λmax = 400 nm with a concomitant growth of three new bands of λmax = 335 (weak), 470 (medium) and 670 nm (strong). Transmission electron microscopy shows that the initial spherical silver particles (8.0 + 1.7 nm) were converted to prismatic structures