Optical properties of a polydispersion of small charged cosmic dust particles

► We express efficiencies as a power-law series of size parameter for charged spheres. ► The extinction of very small nano-spheres depends strongly on the electric potential. ► The phase function is not nearly as sensitive to the potential. ► The inclusion of charge on small cosmic dust particles can have a significant impact on their emission features. ► Charge also affects the resulting equilibrium temperatures of cosmic dust particles.