Artículos de revistas
Temporal Drift In Raman Signal Intensity During Sers Measurements Performed On Analytes In Liquid Solutions
Registro en:
Analyst. Royal Soc Chemistry, v. 141, p. 5071 - 5077, 2016.
0003-2654
1364-5528
WOS:000382111100010
10.1039/c6an00876c
Autor
Setti
G. O.; Joanni
E.; Poppi
R. J.; dos Santos
D. P.; de Jesus
D. P.
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) In this communication, we report one factor that could limit the quantitative analysis by SERS, which has not yet been discussed in the literature. Our results show that SERS experiments performed with the substrate immersed in liquid solutions are subjected to a temporal drift in the Raman signal intensity. Measurements were performed using gold nanoparticle suspensions and gold-covered nanostructured ITO surfaces as SERS substrates, immersed in analyte solutions of crystal violet and 4-mercaptobenzoic acid. Depending on the substrate and the conditions used for measurements, the Raman signal can take between 30 min and several hours to stabilize. This effect, if not taken into account, could have a negative impact on the results of the quantitative chemical analysis by SERS performed in situ in liquid solutions. 141 17 5071 5077 National Council of Technological and Scientific Development (CNPq) [305318/2012-8] Sao Paulo Research Foundation (FAPESP) [2013/25108-9, 2013/22485-6, 2013/22127-2] Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)