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-aminophenyl disulfide on silver surface has been investigated by the use of Fourier transform (FT) surface enhanced Raman scattering (SERS). There is a concentration dependence of the molecular orientation of adsorbed 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 disulfide adsorbed on metal can take part in chemical reactions with epoxy group. Modification at the interface has been achieved for polymer/metal systems by using 4-aminophenyl disulfide as a coupling agent, resulting in adhesion promotion.