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Authors: OSSI HOROVITZ, MARIA TOMOAIA-COTISEL, CSABA RACZ, GHEORGHE TOMOAIA, AURORA MOCANU.
Silver nanoparticles of about 6 nm average size were prepared by reduction of an aqueous silver nitrate solution with sodium citrate and characterized by UV-Vis spectroscopy and transmission electron microscopy (TEM). The interaction of this aqueous colloidal silver solution with the α-lipoic acid solution in ethanol was investigated. The changes in the optical spectra and the TEM images suggest the adsorption of lipoic acid molecules onto the silver nanoparticles and the self assembly of the particles in three dimensional aggregates.
Keywords: silver nanoparticles, α-lipoic acid, UV-Vis spectra, TEM, self aggregation
