Skoči na glavni sadržaj

Nanomaterials and Nanotechnology, Vol. 5 No. Godište 2015, 2015.

Izvorni znanstveni članak

https://doi.org/10.5772/61606

Adsorption and Vibrational Study of Folic Acid on Gold Nanopillar Structures Using Surface-enhanced Raman Scattering Spectroscopy

John J. Castillo ; Grupo de Investigación en Bioquímica y Microbiología, GIBIM, Universidad Industrial de Santander, Bucaramanga, Colombia; Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark
Tomas Rindzevicius ; Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark
Ciro E. Rozo ; Grupo de Investigaciones Ambientales para el Desarrollo Sostenible, Facultad de Química Ambiental, Universidad Santo Tomas, Floridablanca, Colombia
Anja Boisen ; Department of Micro- and Nanotechnology, Technical University of Denmark, Lyngby, Denmark

Puni tekst: engleski pdf 756 Kb

str. 5-29

preuzimanja: 463

citiraj

Sažetak

This paper presents a study of adsorption and vibrational features of folic acid, using surface-enhanced Raman scattering (SERS). A gold-capped silicon nanopillar (Au NP) with a height of 600 nm and a width of 120 nm was utilized to study the vibrational features of FA molecules adsorbed on the nanopillars within the high electromagnetic field areas. The adsorption behaviour of folic acid and the band assignment of the main vibrations together with the optimized geometry of folic acid and folic acid in the presence of a cluster of 10 gold atoms were assessed using the density functional theory (B3LYP(6-31G(d))) and the scalar relativistic effective core potential with a double-zeta basis set (LANL2DZ). The vibrations obtained from the solid-state folic acid and the folic acid on a gold cluster were in accordance with those observed experimentally. The analysis of the main vibrations indicated that the interaction of folic acid with the Au NP occurred primarily through the nitrogen atoms, from their pteridine ring. Finally, the obtained adsorption isotherm for folic acid was deduced from the analysis of the SERS spectra and it followed a negative cooperative binding model.

Ključne riječi

Gold Nanopillars; SERS; Folic Acid

Hrčak ID:

157553

URI

https://hrcak.srce.hr/157553

Datum izdavanja:

1.1.2015.

Posjeta: 1.119 *