Oleic acid-assisted phase transfer of nanosized silver colloids
ABSTRACT In this study, it is demonstrated that silver nanoparticles can be transferred from formamide to chloroform using oleic acid
as a phase transfer agent with a transfer efficiency of 90–95%. The silver nanoparticles are initially formed as an organosol
by the reduction of silver ions with formamide. On aging the complex, the particles self-assemble to form an ordered close-packed
two-dimensional array of silver nanocrystals when dissolved in CHCl3. The size distribution of the colloidal silver particles after transfer in different solvents remains almost the same. On
the basis of IR spectroscopy, we discuss the adsorption of oleic acid over the silver particles.
KeywordsMetals-Chemical synthesis-Electron microscopy-FTIR