Optical fiber surface plasma resonance sensor modified by nano-composite structure

Abstract

The invention relates to the technical field of biomedical sensors, and discloses an optical fiber surface plasma resonance sensor modified by a nano-composite structure. The optical fiber surface plasma resonance sensor comprises a sensing area arranged on an optical fiber, and the sensing area is composed of a fiber core layer, a bonding layer, a sensing dielectric layer and a two-dimensional nano material layer from inside to outside; and the length range of the sensing area is 15 + / -5 mm. Compared with other structures, the optical fiber surface plasma resonance sensor has the advantages that MoS2-graphene nano composite structure can utilize the characteristics of high optical absorption coefficient of MoS2 and large surface area-volume ratio of graphene, so that the detection performance of the SPR sensor is greatly improved. The optical fiber surface plasma resonance sensor also has the advantages of being small in size, high in sensitivity, non-toxic and pollution-free.

Description

technical field [0001] The invention relates to the technical field of biomedical sensors, in particular to an optical fiber surface plasmon resonance sensor modified by a nanocomposite structure. Background technique [0002] With the improvement of people's living standards, changes in diet structure and lifestyle, population aging and the increase in the incidence of obesity, the incidence of diabetes is increasing year by year. Long-term hyperglycemia in the body will endanger the health of the patient and cause serious damage to various organs and the nervous system. Since the current medical conditions are not enough to cure diabetes, effective monitoring and control of blood sugar has become the primary task of diabetes treatment. Therefore, the importance of continuous blood glucose monitoring in the diagnosis and treatment of diabetes has been increasingly recognized by people. [0003] Current blood sugar monitoring mostly uses quick fingertip blood sampling to d...

AI Technical Summary

Problems solved by technology

However, traditional fiber optic SPR sensors face the problem of generally low sensitivity. Therefore, in recent years, there have been many related studies on modifying fiber optic SPR sensors to improve their sensitivity.

[0007] Using two-dimensional nanomaterials to modify optical fiber SPR sensors to improve sensor performance has become a research hotspot this year. Although there are many studies on the surface modification of optical fiber SPR sensors, it is very difficult to directly construct nanostructures on the micron-scale circumferential surface of optical fibers. Existing The methods focus on the growth, binding, self-assembly, etc. of nanoparticles using electrochemical or chemical methods, but these methods are difficult to achieve good control over the arrangement of nanoparticles, especially for the patterned arrangement.

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