Question

Role of surfactants in nanoparticle synthesis

Answer 1

The role of surfactants in the formation of nanoparticles is due to the compartmentalization offered by host surfactant assemblies. They affect the growth and particle characteristics significantly. The preparation of Cu2S nanoparticles in reverse micelle and CuS in aqueous micellar hosts has been described. It indicates that different surfactant systems can mediate to give different products even though the basic chemistry is the same.

Answer 2

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The surfactant modulates the available surface energy of the particles so that the surface tension decreases, and the Kelvin barrier moves, allowing more particles to escape the aggregation process and generally lowering the mean particle size.