Synthesis and plasmonic properties of silver and gold nanoshells on polystyrene cores of different size and of gold–silver core–shell nanostructures

Ken-Tye Yong a,c, Yudhisthira Sahoo a,b, Mark T. Swihart a,c,∗, Paras N. Prasad a,b a Institute for Lasers, Photonics and Biophotonics, University at Buffalo, The State University of New York, Buffalo, NY 14260-4200, USA b Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY 14260-4200, USA c Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260-4200, USA