Expression of Concern: Analysis of the impact of particle separation in a plasmonic spherical dimer on the resonance wavelength

Dimers are composite nanoparticles consisting of two interacting spherical metal particles, with properties suitable for a wide range of applications. The properties of a dimer depend on the particle sizes as well as the separation between the two particles. In this paper we present an analysis of the properties of Dimers using an efficient model for dimers based on the quasistatic approximation.