2013 |
Garrido, C; Aguayo, T; Clavijo, E; Gomez-Jeria, J S; Campos-Vallette, M The Effect of the Ph on the Interaction of L-Arginine with Colloidal Silver Nanoparticles. A Raman and Sers Study Artículo de revista Journal of Raman Spectroscopy, 44 (8), pp. 1105-1110, 2013, ISSN: 0377-0486. Resumen | Enlaces | BibTeX | Etiquetas: amino-acids, aromatic-hydrocarbons, enhanced extended huckel hydrochloride l-arginine, l-lysine, polycyclic potential protein, raman scattering scattering, spectra, spectroscopy, surface surface, temperature, theory zeta @article{RN154, title = {The Effect of the Ph on the Interaction of L-Arginine with Colloidal Silver Nanoparticles. A Raman and Sers Study}, author = { C. Garrido and T. Aguayo and E. Clavijo and J.S. Gomez-Jeria and M. Campos-Vallette}, url = {/brokenurl#<Go to ISI>://WOS:000323180700006}, doi = {10.1002/jrs.4331}, issn = {0377-0486}, year = {2013}, date = {2013-01-01}, journal = {Journal of Raman Spectroscopy}, volume = {44}, number = {8}, pages = {1105-1110}, publisher = {2013 John Wiley & Sons, Ltd.}, abstract = {Raman and surface enhanced Raman scattering (SERS) spectroscopies were used to study the pH effect (7 to 9) on the interaction of arginine (Arg) with colloidal Ag nanoparticles (AgNps). A new methodology was implemented in order to obtain reproducible SERS spectra in solution. The dependence of the Arg concentration on the stability of the AgNps is discussed. A pH increasing of the colloidal solution to the limits of the Arg pKa(2) value induces a preferential and stable Arg-metal interaction. potential measurements of the Arg-AgNps system at different pH conditions studied provide information about the Arg-AgNps interaction; the pH increasing favors the interaction. SERS spectra at pH 7 indicate that the molecule interacts with the Ag surface only through the guanidinium fragment. By increasing the pH to 9, the molecule adopts a new conformation on the surface; the metal-analyte interaction is verified through the guanidinium, carboxylate and the aliphatic moieties. In addition, theoretical calculations performed by using the extended Huckel method for a model of Arg interacting with an Ag surface support the observed SERS results.}, keywords = {amino-acids, aromatic-hydrocarbons, enhanced extended huckel hydrochloride l-arginine, l-lysine, polycyclic potential protein, raman scattering scattering, spectra, spectroscopy, surface surface, temperature, theory zeta}, pubstate = {published}, tppubtype = {article} } Raman and surface enhanced Raman scattering (SERS) spectroscopies were used to study the pH effect (7 to 9) on the interaction of arginine (Arg) with colloidal Ag nanoparticles (AgNps). A new methodology was implemented in order to obtain reproducible SERS spectra in solution. The dependence of the Arg concentration on the stability of the AgNps is discussed. A pH increasing of the colloidal solution to the limits of the Arg pKa(2) value induces a preferential and stable Arg-metal interaction. potential measurements of the Arg-AgNps system at different pH conditions studied provide information about the Arg-AgNps interaction; the pH increasing favors the interaction. SERS spectra at pH 7 indicate that the molecule interacts with the Ag surface only through the guanidinium fragment. By increasing the pH to 9, the molecule adopts a new conformation on the surface; the metal-analyte interaction is verified through the guanidinium, carboxylate and the aliphatic moieties. In addition, theoretical calculations performed by using the extended Huckel method for a model of Arg interacting with an Ag surface support the observed SERS results. |
2013 |
The Effect of the Ph on the Interaction of L-Arginine with Colloidal Silver Nanoparticles. A Raman and Sers Study Artículo de revista Journal of Raman Spectroscopy, 44 (8), pp. 1105-1110, 2013, ISSN: 0377-0486. |