Journal
OPTICS EXPRESS
Volume 29, Issue 21, Pages 34552-34564Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.435662
Keywords
-
Categories
Funding
- Natural Science Foundation of Shandong Province [ZR201910280104]
Ask authors/readers for more resources
A sandwich SERS substrate based on tantalum oxide was designed and fabricated in this study, demonstrating high sensitivity, stable performance, and high quantification capability for Raman detection of crystal violet. The substrate achieved a detection limit of 10(-11) M and an enhancement factor of 1.5 x 10(9), showing stable performance even after exposure to air for one month.
The composite substrate composed of precious metal, semiconductor and graphene has not only high sensitivity and uniform Raman signal but also stable chemical properties, which is one of the important topics in the field of surface-enhanced Raman scattering (SERS). In this paper, a sandwich SERS substrate based on tantalum oxide (Ta2O5) is designed and fabricated. The substrate has high sensitivity, stable performance and high quantification capability. The composite substrate can achieve a high sensitivity Raman detection of crystal violet (CV) with a detection limit of 10(-11) M and an enhancement factor of 1.5 x 10(9). This is the result of the synergistic effect of electromagnetic enhancement and chemical enhancement, in which the chemical enhancement is the cooperative charge transfer in the system composed of probe molecules, silver nanoparticles (AgNPs) and Ta2O5, and the electromagnetic enhancement comes from the strong local surface plasmon resonance between the adjacent AgNPs. After exposing the composite substrate to the air for one month, the Raman signal did not weaken, indicating that the performance of the composite substrate is stable. In addition, there is an excellent linear relationship between the intensity of Raman characteristic peak and the concentration of probe molecules, which proves that the composite substrate has high quantification capability. In practical application, the composite SERS substrate can be used to detect harmful malachite green quickly and sensitively and has a broad application prospect in the field of food safety and chemical analysis. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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