Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 10, Pages 4184-4190Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp112021j
Keywords
-
Funding
- FAPESP
- CNPq
- CAPES
Ask authors/readers for more resources
This paper studies the selectivity of Well-defined Au and Ag nanostructures as substrates for the SERS, (surface-enhanced Raman scattering) detection of simazine (6-chloro-N,N'-diethyl-1,3,5-triazine-2,4-diamine) and atrazine (6-chloro-N-ethyl-N'-isopropyl-1,3,5-triazine-2,4-diamine). Our data showed that simazine and atrazine displayed similar SERS spectra when the Au was employed as substrate. Conversely, distinct SERS signatures were obtained upon the utilization of Ag substrates. Density functional theory (DFT) calculations and vibrational assignments suggested that, while simazine and atrazine adsorbed on Au via the N3 position of the triazine ring, simazine adsorbed on Ag via N3 and atrazine via N5. The results presented herein demonstrated that the adsorption geometry of analyte molecules can play a central role over substrate selectivity in SERS, which is particularly important in applications involving ultrasensitive analysis of mixtures containing structurally similar molecules.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available