Publications [#304864] of Tuan Vo-Dinh

Papers Published

1. Bello, JM; Narayanan, VA; Vo-Dinh, T, Surface-enhanced Raman scattering interaction of p-aminobenzoic acid on a silver-coated alumina substrate, Spectrochimica Acta Part A: Molecular Spectroscopy, vol. 48 no. 4 (1992), pp. 563-567, ISSN 0584-8539
   (last updated on 2026/01/22)

   Abstract:
   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.