Facile synthesis of gold nanopuncheons with high-index facets and their SERS effects on Rhodamine 6G

• Au nanopuncheons with high-index facets have been prepared by seed-mediated growth.
• The nanopuncheons are enclosed by 24 planes of {2 5 0}, {3 0 1} and 2 {0 1 0} planes.
• The nanopuncheons showed high SERS activity toward Rhodamine 6G.

Au nanopuncheons with exposed high-index facets have been synthesized in high-yield by employing didodecyldimethylammonium bromide (DDAB) as surfactant in one-step seed-mediated growth. Transmission electron microscopy (TEM) characterization showed that the as-prepared Au nanopuncheons possessed 24 high index facets of {2 5 0}, {3 0 1}, and 2 {0 1 0} planes. Due to the high density of atomic steps and kinks in the structure, the Au nanopuncheons exhibited high surface enhanced Raman scattering (SERS) activity toward Rhodamine 6G.

Figure optionsDownload as PowerPoint slide