Synthesis and optical properties of Au@Ag bimetallic nanoparticles
by Xavier E. Guerrero-Dib, Ubaldo Ortiz-Mendez, Selene Sepulveda-Guzman, Oxana V. Kharissova, Domingo Ferrer-Luppi
International Journal of Nanoparticles (IJNP), Vol. 3, No. 4, 2010

Abstract: Synthesis of Au, Ag monometallic, and Au-Ag bimetallic nanoparticles have been synthesised by successive reduction of metal salts with ascorbic acid on prefabricated seeds in the presence of cetyltrimethylammonium bromide (C₁₆H₃₃)N(CH₃)₃Br (CTAB), as a cationic surfactant, is presented in this paper. This coverage method for the prefabricated seeds is uniform, although in some cases deviations from a spherical shape are observed with the formation of nanorods or nanoprisms. Results using high-resolution STEM-XEDS elemental mapping suggest that the actual distribution of the two metals within the multilayer spheres may involve partial alloying of the metals.

Online publication date: Fri, 26-Nov-2010

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