Abstract
In this paper, we proposed a rapid method of detecting Methidathion pesticides by surface enhanced Raman scattering (SERS). In the method, Ag nanoparticles (AgNPs) are synthesized by the modified Tollens technique and deposited on glass slides to become simple detection arrays for SERS detection. The AgNPs synthesis used in this research is environmentally friendly and does not produce harmful substances to the environment. Through measuring/investigating the SERS signals of Rhodamine 6G under different concentrations, the preparation process and process parameters of the detection substrate are determined. The Methidathion detection limit reaches 0.1 ppm based on the substrates. This work lays a foundation for preparation of large-scale SERS detection arrays in the future.
Highlights
Since 1973, the surface-enhanced Raman scattering (SERS) of electrochemically rough silver has been discovered,1,2 SERS, as an effective, sensitive tool, is capable of giving the information via generating huge enhanced Raman signals
We applied a perforated tape on a glass slide to make a simple suppression of the coffee ring effect by using the thickness of the tape, so that Ag nanoparticles (AgNPs) were evenly distributed in the pores, improving the detection effect of the SERS substrate
100 ppm of the standard Methidathion sample dissolved in acetonitrile solution was diluted with deionized water to obtain a solution of the Methidathion to be tested at 10 ppm to 0.01 ppm. 2 μl of the solution to be tested was taken with a pipette, dropped into the SERS substrate on the pad, and the solution to be tested was sufficiently fused with the substrate and dried
Summary
Since 1973, the surface-enhanced Raman scattering (SERS) of electrochemically rough silver has been discovered, SERS, as an effective, sensitive tool, is capable of giving the information via generating huge enhanced Raman signals. It absorbs the molecules on the designed surface and reflects its characteristics by the spectrum, which has high sensitivity and does not damage the sample.. We applied a perforated tape on a glass slide to make a simple suppression of the coffee ring effect by using the thickness of the tape, so that AgNPs were evenly distributed in the pores, improving the detection effect of the SERS substrate. The improved Tollens method used synthesize AgNPs and deposited on a glass slide as a detection substrate to achieve 0.1 ppm detection limit of Methidathion
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
