Porous array electromagnetic field reinforced SERS (surface enhanced raman scattering) device for detecting trace microcystic toxin and preparation method and detection method

Abstract

The invention discloses a porous array electromagnetic field reinforced SERS (surface enhanced raman scattering) device for detecting trace microcystic toxins and a preparation method of the porous array electromagnetic field reinforced SERS device. The device comprises a silicon dioxide substrate layer and a film layer which are adhered to each other, wherein a window is reserved in the silicon dioxide substrate layer to enable a part of the film layer to be exposed; a metal layer is adhered to the surface of the window and the exposed film layer; upper and lower through holes A and B which are distributed in an array manner are respectively formed in the exposed film layer and the metal layer on the exposed film layer; and the film layer is a silicon nitride film, a molybdenum disulfide film or a graphene film. The invention further discloses a method for detecting trace microcystic toxin molecules in a water environment by utilizing the SERS device. By adopting the method, detection of through hole weak current signals of the trace microcystic toxin molecules and enhancement of weak Raman scattering signals of the trace microcystic toxin molecules are achieved, and detection of the contents of trace molecules and detection of surface enhanced Raman scattering signals are achieved simultaneously.

Description

technical field [0001] The invention belongs to the technical field of microcystin detection, and in particular relates to a porous array electromagnetic field-enhanced SERS device for detection of trace microcystins, a preparation method and a detection method. Background technique [0002] Microcystin is a bioactive heptapeptide monocyclic hepatotoxin with the highest frequency, the largest amount of production, and the most serious damage during cyanobacteria blooms. It mainly damages the organism by inhibiting protein phosphatase 1 and protein phosphatase 2A. In the liver, more than 80 isomers have been discovered so far, which are classified as carcinogenic compounds of type 2B by the International Agency for Research on Cancer. The World Health Organization and the Chinese government respectively limit the content of microcystins in drinking water to 1 μg / L. However, the research results show that the content of MCs in eutrophic water is very small, only at the level ...

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, one of the objectives of the present invention is to provide a porous array electromagnetic field-enhanced SERS device and a preparation method for microcystin detection, and the second is to provide a porous array-based electromagnetic field-enhanced SERS device. A trace microcystin detection and analysis method of the device is used to solve the problems of complicated microcystin detection operations, expensive sample pretreatment, and difficulty in in-situ monitoring of water bodies in the prior art

Images