Comment on “Synthesis and electrorheological characteristics of titanate nanotube suspensions under oscillatory shear”

We comment on the recently published dielectric properties of titanate nanotubes (TNTs)- and titania nanoparticles (P25)-based electrorheological (ER) fluids in this note aiming to make a better understanding of their ER performance. Based on our Cole–Cole model plot, it is found that we can fit the dielectric spectra (dielectric constant/dielectric loss vs. frequency) of two ER fluids well with a better explanation of their polarizability by differentiating their ER performance.