Due to its high conductivity, environmental stability, low cost, and easy processability, conjugated conducting polymers—especially polyaniline (PANI)—are promising materials for future applications in molecular electronics, wires, chemical sensors, and devices. A novel PANI nanofiber/kaolinite nanoplate hybrid is prepared by Baoxiang Wang et al. on page 1104 via a rapidly mixed in situ polymerization. The cover shows an electron microscopy image, in which the surface of the hexagonal clay plate is coated by nanofibers. The nanoclay platelets can improve the thermal stability of polyaniline nanofibers. The hybrid nanocomposite can be used for a smart electrorheological fluid, which shows better dispersion stability.