FOURIER-TRANSFORM SURFACE-ENHANCED RAMAN-SCATTERING STUDIES OF MOLECULAR SELF-ASSEMBLY OF DISULFIDES ON METALS AND THE APPLICATION IN ADHESION PROMOTION

The adsorption and molecular orientation of phenyl disulfide and 4-ami nophenyl disulfide on silver surface has been investigated by the use of Fourier transform (FT) surface enhanced Raman scattering (SERS). Th ere is a concentration dependence of the molecular orientation of adso rbed disulfides on silver surface. Disulfides could be adsorbed on Ag surface as self-assembled, well oriented monolayers from a very dilute solution. The amino group exposed outwards on the 4-aminophenyl disul fide adsorbed on metal can take part in chemical reactions with epoxy group. Modification at the interface has been achieved for polymer/met al systems by using 4-aminophenyl disulfide as a coupling agent, resul ting in adhesion promotion.