10.1021/la803900w.s001 Hye-Mi Bok Hye-Mi Bok Kevin L. Shuford Kevin L. Shuford Sungwan Kim Sungwan Kim Seong Kyu Kim Seong Kyu Kim Sungho Park Sungho Park Multiple Surface Plasmon Modes for Gold/Silver Alloy Nanorods American Chemical Society 2009 surface plasmon resonance Multiple Surface Plasmon Modes Aux Ag portion length 300 nm variation anodized aluminum oxide templates peak positions electrochemical codeposition nanorod LSPR modes bimetallic gold LSPR mode 2009-05-05 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Multiple_Surface_Plasmon_Modes_for_Gold_Silver_Alloy_Nanorods/2859415 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<sub><i>x</i></sub>/Ag<sub>1−<i>x</i></sub> 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<sub><i>x</i></sub>/Ag<sub>1−<i>x</i></sub> alloy nanorods were calculated using the discrete dipole approximation and showed a good agreement with the experimental measurements.