A surface-enhanced raman scattering substrate, a preparation method and application thereof

By using a surface-enhanced Raman scattering substrate based on chalcogenide phase change materials and employing photo-triggered excitation to achieve non-volatility and reconfigurable tuning, the problems of low sensitivity and insufficient tunability of existing substrates are solved, enabling high-sensitivity and convenient multi-molecule detection.

CN121612863BActive Publication Date: 2026-03-31DALIAN UNIV OF TECH
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Patent Information

Application Number
CN202610149676.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-03
Publication Date
2026-03-31
Estimated Expiration
2046-02-03

AI Technical Summary

Technical Problem

Existing surface-enhanced Raman scattering substrates have shortcomings in terms of sensitivity, tunability, and cost, making it difficult to achieve high-sensitivity detection of a variety of biomolecules. Furthermore, existing tunable substrates cannot achieve cyclic reversible regulation.

Method used

A surface-enhanced Raman scattering substrate based on chalcogenide phase change materials is used to achieve non-volatility and reconfigurable tuning through external light triggering. Combined with distributed Bragg mirrors and nanoscale metal structure layers, the Tamm state resonant wavelength is tuned to enhance the Raman signal.

Benefits of technology

It achieves high sensitivity, non-volatility and reconfigurability of Raman detection, suitable for multi-band detection and multi-molecule detection, and provides a convenient and highly sensitive detection solution.

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Abstract

The application relates to a surface enhanced Raman scattering (SERS) substrate, a preparation method and application thereof, and belongs to the technical field of Raman spectrum detection. The substrate comprises, from bottom to top, a substrate layer, a distributed Bragg reflector, a chalcogen phase change material functional layer and a nanoscale metal structure layer. The distributed Bragg reflector is composed of a periodic structure stack of medium materials with different refractive indexes. The distributed Bragg reflector is coupled with the nanoscale metal structure layer to excite a Tamm state. The chalcogen phase change material functional layer can realize reversible regulation of amorphous state and crystalline state under external light excitation, changes the Tamm state resonance wavelength to regulate the SERS enhancement effect. The application realizes high-sensitivity detection through double enhancement of the Tamm state and localized surface plasmon resonance, has the characteristics of non-volatility, reconfigurability, high reproducibility and design flexibility, is convenient to operate, stable in performance, and is suitable for fields of chemical biological sensing, laboratory chip systems and optical encryption.
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