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

Journal Article (Academic 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 nonflat orientation on the metal surface

Full Text

Duke Authors

Cited Authors

  • Bello, JM; Anantha Narayanan, V; Vo Dinh, T

Published Date

  • 1992

Published In

  • Spectrochim. Acta A, Mol. Spectrosc. (Uk)

Volume / Issue

  • 48A / 4

Start / End Page

  • 563 - 567

Digital Object Identifier (DOI)

  • 10.1016/0584-8539(92)80047-Z