Optical properties of self-assembled anisotropic gold nanoparticles

Metal nanoparticles have become more and more important to electronics, photonics, biotechnology, and so on. In particular, anisotropic gold nanoparticles such as gold nanorods exhibit unique properties due to its anisotropy. We reported a method for three-dimensional assembling of anisotropic gold nanoparticles as well as gold nanospheres, by two-phase transfer. In this study, we numerically calculate extinction spectra to analyze the interparticle interaction for the assembled nanoparticles.