Affiliation:
1. MOE Key Laboratory for Analytical Science of Food Safety and Biology Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety College of Chemistry Fuzhou University Fuzhou 350000 P. R. China
2. College of Chemical Engineering Fuzhou University Fuzhou 350000 P. R. China
Abstract
AbstractHydrogel surface‐enhanced Raman scattering (SERS) chips with tunable localized surface plasmon resonance (LSPR) wavelength are prepared to coordinate the chemical enhancement (CM) and electromagnetic enhancement (EM) effects for molecules. When detecting different molecules, a laser with matched energy is selected according to energy intervals between the molecular energy levels and the Fermi level of Ag nanoparticles to obtain the strongest CM effect. Meanwhile, a hydrogel SERS chip with the LSPR wavelength matching with the laser is selected to gain the strongest EM effect. As a result, the constructed hydrogel SERS chips show outstanding activity to many molecules. Amoxicillin, pymetrozine, and chlorpyrifos are used as the model molecules to demonstrate the great importance of CM effect and the working principle of the obtained hydrogel SERS chips. Besides the ultrahigh activity, the obtained hydrogel SERS chips also show high uniformity, long‐term stability, and strong anti‐interference to the sample matrix, and thereby are highly practical. This work not only provides an efficient strategy for building high‐performance SERS substrates, but also sheds the light on the mechanism of wave selection of SERS.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Fujian Province
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
7 articles.
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