Non-Destructive Characterization of Polymer/Metal Interphases Using Surface-Enhanced Raman Scattering

Download or read book Non-Destructive Characterization of Polymer/Metal Interphases Using Surface-Enhanced Raman Scattering written by F. J. Boerio and published by . This book was released on 1990 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface enhanced Raman scattering (SERS) is an analytical technique in which the Raman scattering cross sections of molecules adsorbed onto the roughened surfaces of certain metals are enhanced by as much as six orders of magnitude compared to their value for normal Raman scattering. The mechanisms are associated with the large electric fields that can be induced at the surfaces of metal particles having small radii of curvature and with formation of charge transfer complexes between the adsorbed molecules and the substrate. Enhancement due to the charge transfer mechanism is obtained only for molecules immediately adjacent to the surface but enhancement due to the electromagnetic mechanism may extend several monolayers away from the surface. Since normal Raman scattering by polymers is weak and scattering by molecules adjacent to the substrate is strongly enhanced, SERS can be used for nondestructive characterization of interfaces between polymer films and metals. Silver, Polymers, Materials, Acrylic monomer, Cumene, Hydroperoxide(CHP), Acetylphenylhydrazine(APH), Saccharin, Adhesives, Pyromellitic diimide (PMDI), Surface properties. (JG).