Surface-enhanced Raman scattering interaction of p-aminobenzoic acid on a silver-coated alumina substrate

Journal Article

The adsorption behavior of p-aminobenzoic acid (PABA) molecules on a silver-coated alumina surface-enhanced Raman scattering (SERS) substrate was investigated. For spotted PABA and PABA in non-polar solvents, the PABA molecule is adsorbed flat on the surface of the SERS substrate. In this orientation, the benzene ring is π-bonded to the substrate, and the molecule is further anchored to the substrate by the binding of the lone pairs of NH2 and COO- groups onto the metal surface. On the other hand, the adsorption behavior of PABA in a polar solvent is greatly influenced by the hydrogen bonding of the amine group with the polar solvent. In this orientation, the molecule is preferentially adsorbed through the COO± and assumes a non-flat orientation on the metal surface. © 1992.

Duke Authors

Cited Authors

  • Bello, JM; Narayanan, VA; Vo-Dinh, T

Published Date

  • 1992

Published In

Volume / Issue

  • 48 / 4

Start / End Page

  • 563 - 567

International Standard Serial Number (ISSN)

  • 0584-8539