Covalent attachment of oligofluorenes onto Si and indium tin oxide(ITO) substrates by grafting with organosilanes

Two methods of introducing oligofluorenes onto Si and indium tin oxides(ITO) substrates by grafting with organosilane are presented. The organosilane, 3-aminopropyltriethoxysilane(APTES), was used as molecular bridge to link oligofluorenes onto silicon and ITO substrates. Such substrate-based oligofluorenes films were investigated by X-ray photoelectron spectroscopy (XPS), AFM, and electrochemical analysis. All results prove that oligofluorenes immobilization on silicon and ITO substrates through orgaosilane molecular bridge is feasible.