Simulation of the optical properties of gold nanoparticles on sodium alginate Caterina Summonte, Piera Maccagnani, Alberto Maurizi, Giulio Pizzochero and Gabriele Bolognini EPJ Web Conf., 255 (2021) 08002 Published online: 18 November 2021 DOI: 10.1051/epjconf/202125508002