Bimetal optical fiber SPR (Surface Plasmon Resonance) sensor based on silver core-gold shell nanoparticles

By using silver-core gold-shell nanoparticles and graphene oxide layers in the SPR sensor, the problem of low detection sensitivity of existing SPR sensors is solved, and high sensitivity detection of low molecular weight biological molecules and low concentration biological molecules is achieved.

CN119715470APending Publication Date: 2025-03-28天津大学浙江研究院
0 Cites 2 Cited by

Patent Information

Application Number
CN202411939645.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The detection sensitivity of existing SPR sensors is low, making it difficult to effectively detect low molecular weight biomolecules and biomolecules with concentrations of ng/mL.

Method used

A bimetallic fiber SPR sensor based on silver core gold shell nanoparticles is used to form a metal functional layer by growing silver nanoparticles in situ on the outer surface of the optical fiber sensing area and growing a layer of gold film on its surface. In addition, the graphene oxide layer is coated to enhance the sensitivity of the sensor.

Benefits of technology

The detection sensitivity of the sensor is significantly improved, and it can effectively detect low-molecular weight biological molecules and low-concentration biological molecules, with a detection sensitivity of 5170.7nm/RIU.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application discloses a bimetallic optical fiber SPR sensor based on silver core-gold shell nanoparticles, comprising: an optical fiber, the outer surface of which is provided with a sensing area; and the metal functional layer is arranged on the sensing area, the metal functional layer comprises dispersedly stacked silver nanoparticles, and the outer surfaces of the silver nanoparticles are coated with gold films. The metal functional layer of the sensor is composed of the metal nanoparticles, and compared with a traditional metal film SPR sensor, the specific surface area and porosity of metal are remarkably improved, and the detection sensitivity of the SPR sensor can be improved; silver nanoparticles are adopted as a main metal material, SPR sensing is greatly promoted, the silver nanoparticles are coated with a gold film to form isolated bimetal nanoparticles, the chemical stability of the silver nanoparticles is improved, the sensor is endowed with common characteristics of gold and silver, and the detection performance is remarkably improved.
Need to check novelty before this filing date? Find Prior Art