Raman spectrometer probe and manufacturing method thereof

Abstract

The invention discloses a Raman spectrometer probe and a manufacturing method thereof; the structure of the probe comprises a multimode fiber; the detection end face of the multimode fiber is attached with a nanometer metal microstructure and a SiO2 aerosol layer; the external surface of the nanometer metal microstructure is attached with an inert compact layer; the inert compact layer is a chemical inert material. The manufacturing process comprises the following steps: spraying a SiO2 aerosol binder on the detection end face of the multimode fiber, then spraying nanometer metal microsphere particles isolated by the chemical inert material; or coating a nano-scale metal layer on the detection end face of the multimode fiber; etching the surface by lithography technology to obtain a tooth-shaped nanometer metal microstructure, finally coating the SiO2 aerosol layer with a thickness of several nanometers on the surface to form a chemical isolation state. The probe of the invention has higher sensitivity and detection precision, is simple in structure, convenient for manufacturing, and low in cost, needs no pretreatment, and is widely applicable to examination and detection work of various types of trace toxic and harmful substances.

Description

technical field [0001] The invention relates to the field of optical detection instruments, in particular to a Raman spectrometer probe. Background technique [0002] In recent years, melamine, Sudan red and other incidents have exposed huge loopholes in the field of food safety, and the lives and health of the public have been seriously threatened. The detection of low-concentration trace substances has become a research hotspot in food safety testing. Compared with other spectra, Raman spectroscopy can provide rich molecular structure and molecular vibration information, so it has become a powerful tool for material analysis and material identification. However, the Raman scattering cross section is usually in the 10 -30 This is only one thousandth of Rayleigh scattering, and it is very easy to be submerged in the fluorescence background noise, which greatly limits the application of Raman spectroscopy in various fields. [0003] Surface-Enhanced Raman Scattering (SERS) ...

AI Technical Summary

Problems solved by technology

However, the existing solutions often have problems such as difficult fiber processing or the need for pretreatment, which greatly slows down the practical application of this technology.

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