Rp. Bagwe et Kc. Khilar, Effects of intermicellar exchange rate on the formation of silver nanoparticles in reverse microemulsions of AOT, LANGMUIR, 16(3), 2000, pp. 905-910
We report the effects of intermicellar exchange rate on absorption spectra
and particle size of silver nanoparticles synthesized in reverse micelles o
f AOT. The silver nanoparticles are prepared by the method of mixing of two
microemulsions, one containing the silver nitrate and the other containing
sodium borohydride. The intermicellar exchange rate is varied by changing
the organic solvent, surfactant (SDS, NP-5, and DTAB), and organic (benzyl
alcohol and toluene) additives. The higher intermicellar exchange rate is f
ound to give smaller particle size and blue shift in the absorption spectra
. An interesting and potentially useful effect has been observed in that ad
dition of a small amount of a nonionic surfactant significantly reduces the
particle size.