title: Multiple surface plasmon modes for gold/silver alloy nanorods.
abstract: Alloy nanorods consisting of bimetallic gold and silver are synthesized by employing the electrochemical codeposition of Au/Ag alloy materials into the pores of anodized aluminum oxide templates. This paper presents the variation of localized surface plasmon resonance (LSPR) modes of the Au(x)/Ag(1-x) alloy nanorods as a function of relative compositions of Au and Ag. Transverse and multiple longitudinal modes were observed when the length was longer than ca. 300 nm. For a given length, the transverse LSPR mode systematically blue-shifted as the Ag portion increased, while there was little variation in peak positions of the longitudinal LSPR modes. The optical properties of the Au(x)/Ag(1-x) alloy nanorods were calculated using the discrete dipole approximation and showed a good agreement with the experimental measurements.
authors.affiliation: Department of Chemistry and Department of Energy Science, Sungkyunkwan University, Suwon, South Korea.
authors.forename: Hye-Mi
authors.initials: HM
authors.lastname: Bok
authors.forename: Kevin L
authors.initials: KL
authors.lastname: Shuford
authors.forename: Sungwan
authors.initials: S
authors.lastname: Kim
authors.forename: Seong Kyu
authors.initials: SK
authors.lastname: Kim
authors.forename: Seong
authors.initials: S
authors.lastname: kyuKim
authors.forename: Sungho
authors.initials: S
authors.lastname: Park