Argonne National Laboratory Center for Nanoscale Materials U.S. Department of Energy
Silver chloride-gold nanoparticles

Gold-coated silver chloride (AgCl) nanowires at the microscopic level.

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Gold nanoparticles create visible-light catalysis in nanowires

A two-step approach has been developed within the Nanophotonics Group to synthesize AgCl nanowires decorated with gold nanoparticles by using silver nanowires as chemical templates. In the first step, the silver nanowires are chemically oxidized and converted to AgCl nanowires. In the second step, ions generated in the first step reduce gold precursors (e.g., NaAuCl4) to deposit gold nanoparticles on the AgCl nanowire surfaces, resulting in the formation of AgCl:gold composite nanowires. Because of the strong surface plasmon resonance and chemical inertness of gold nanoparticles, the nanowires exhibit enhanced absorption in the visible region and enhanced chemical stability with respect to degradation and aggregation. The AgCl:Au nanowires show promise as plasmonic photocatalysts and in fact can efficiently decompose organics under visible light. (More >>)

Y. Sun, J. Phys. Chem. C, 114 (5), 2127–2133 (2010)

June 2010

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