Highly stable and AC electric field-activated electrorheological fluid based on mesoporous silica-coated graphene nanosheets

We report a new electrorheological fluid based on mesoporous silica-coated graphene nanosheets. Coating with mesoporous silica limits the high conductivity of graphene and improves the dispersed ability of nanosheets in silicone oil, while the graphene core helps to induce large and fast particle polarization for high electrorheological response, in particular under AC electric fields.