. . . . "In accordance with the purposes of the present invention, the present invention relates to a modified particle which includes a particle having an attached group having the formula: wherein A represents an aromatic group or an alkyl group; R1 represents a bond, an arylene group, an alkylene group, wherein R4 is an alkyl or alkylene group or an aryl or arylene group; R2 and R3, which can be the sam" . .