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Updated: May 3, 2026
Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
Published on: May 28, 2016
Anisotropic growth of Au-Ag heteronanostructures through plasmon-induced reduction
Hiroyasu Nishi1, Yuan Zuo1, Yoshinori Kuroiwa1
1Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan.
Abstract:
Plasmonic heteronanostructures are promising building blocks for photofunctional materials and devices including photocatalysts, optical materials, and optoelectronic devices. In the present work, we fabricated Au-Ag bimetallic heteronanostructures based on site-selective and anisotropic Ag deposition and growth on Au nanocubes. Plasmonic Au nanocubes were adsorbed onto a glass plate, and the distal mode or proximal-distal mode of the nanocubes was selectively excited in the presence of Ag+ and citrate ions. Polycrystalline Ag was deposited around the top of the Au nanocubes by the distal mode excitation, and single crystalline Ag was grown laterally from the Au nanocubes by the proximal-distal mode excitation. The present method would be applied to the fabrication of various plasmonic nanostructures composed of two or more heterodomains.
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