The Experimental Study of Laser Raman Scattering Effect of Isonicotinic Acid Adsorbed on the Chemically Deposited Silver Film

This Paper presents the preparation of silver film with chemical method and the SERS spectra of isonicotinic acid adsorbed on the chemically deposited silver film at various pH values . We find that there have stronger SERS effects for isonicotinic acid adsorbed on the silver film and the SERS spectra change with the varying of pH values. Experimental results show that the adsorption Pattern of isonicotinic acid adsorbed on the chemically deposited silver film changes with the varying of pH values. At lower pH values, isonicotinic acid flatly adsorbed on the chemically deposited silver film surface via ring plane; at high pH values, isonicotinic acid perpendicularly adsorbed on the silver film via -COO^-of isonicotinic ions.