LARGE ENHANCEMENT IN ELECTRORHEOLOGICAL ACTIVITY OF MESOPOROUS CERIUM-DOPED TIO2 FROM HIGH SURFACE AREA AND ROBUST PORE WALLS

Abstract

Considering the importance of large interfacial or surface polarization to strong electrorheological (ER) effect, we developed a high surface area mesoporous doped TiO 2 ER material by using block-copolymer. By comparing the ER experiments between samples with mesopore and without mesopore, we demonstrate a very large enhancement in ER activity of mesoporous ER material and its yield stress is 100 times that of the pure TiO 2 ER material and 5-8 times that of single doped TiO 2 without mesoporous structure. We give a preliminary discussion about the improvement in ER activity based on previous dielectric analysis.