Monodisperse conducting colloidal dipoles with symmetric dimer structure for enhancing electrorheology properties

► Symmetric colloidal dipole particles were fabricated for electrorheological applications. ► Shape anisotropy of conducting particles is critical for enhancing electrorheology effects. ► Shape anisotropy of suspending particles increases the dipole moment under the electric field. ► Colloidal dipoles form a well-structured colloidal gel network under electrical fields.