There is described an electrorheological fluid comprising coated nanoparticle
suspended in an electrically insulated hydrophobic liquid. The core particles consist
of TiO2 or metal salts of the form M1xM22-2xTiO(C2O4)2
where M1 is selected from the group consisting of Ba, Sr and Ca and wherein
M2 is selected from the group consisting of Rb, Li, Na and K. The particle shell
is made of highly polar molecules selected from the group consisting of thiourea
and urea.
