The surface geometry and orientation of the first layer of poly(4-vinyl pyridine) on silver foil have been determined by observing the change in relative intensity of the out-of-plane ring deformation and the in-plane ring stretching vibration bands in surface-enhanced Raman scattering spectra. This polymer shows two side group orientations on the silver surface, resulting from different sampling temperatures. At ambient temperature, the pyridine ring lies fiat on the metal surface with a n-bonded geometry, while upon heating the ring stands up to form an N-bonded geometry. Infra-red reflection-absorption spectra show no differences related to the bond orientation due to the interference of the bulk film
Посилання на статтю:
Study of molecular orientation and bonding at the polymer-metal interface by surface-enhanced Raman scattering / Yun Lu and Gi Xue* // Polymer. – 1993. – Vol 34. – P. 3750-3752.