Abstract

Anisotropic metal nanoparticles have been an attractive research target because of their remarkable spectroscopic properties. We have reported Au-Ag core-shell nanorods of which spectroscopic properties corresponded to those of anisotropic silver nanoparticles [1,2]. Our core-shell nanorods are chemically unstable in the absence of reducing agent. Oxidation of the silver shells gradually proceeded in an aqueous solution and accompanied by changes in their shapes. The shape changes resulted in spectroscopic changes.

© 2013 Japan Society of Applied Physics, Optical Society of America