A reusable two-dimensional SERS substrate resistant to extreme environments and a preparation method thereof

By preparing a composite material of a nano-metal film array and an organic polymer coating on cellulose paper, the problems of easy corrosion and non-reusability of existing SERS substrates in extreme environments are solved, and a high-sensitivity and reusable SERS detection effect is achieved.

CN116794014BActive Publication Date: 2026-07-14FUJIAN NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUJIAN NORMAL UNIV
Filing Date
2023-06-25
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing SERS substrate materials are prone to corrosion and oxidation in extreme environments and cannot be reused, which affects detection sensitivity and reproducibility, limiting their application in complex matrices.

Method used

Using cellulose paper as a support material, combined with a nano-metal film array and an organic polymer coating, a nano-metal film is prepared by a three-phase interface self-assembly method, and an organic polymer is spin-coated to form a composite material, thus constituting a reusable two-dimensional SERS substrate resistant to extreme environments.

Benefits of technology

This substrate maintains good SERS enhancement and cleanability in extreme environments, is reusable, improves detection sensitivity and reproducibility, is suitable for liquid drop detection and three-dimensional surface detection, and reduces preparation costs.

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Abstract

The application discloses a reusable two-dimensional SERS substrate resistant to extreme environment and a preparation method thereof. Cellulose paper is used as a supporting material and is immersed below a nano metal film, then an organic polymer is uniformly spin-coated on the surface of the nano metal film array structure, so that the two-dimensional SERS substrate is obtained by coating the nano metal film. The two-dimensional SERS substrate prepared by the method retains the flexible characteristics of the cellulose paper. The existence of the organic polymer makes the nano metal film fixed on the cellulose paper isolated from air, slows down the oxidation of the nano metal film in air, and effectively prolongs the shelf life. In addition, due to the good physical and chemical stability and the relatively smooth surface of the polymer after solidification, the two-dimensional SERS substrate not only has the resistance to extreme environment, but also can be used normally in the extreme environment. In addition, the two-dimensional SERS substrate is endowed with cleanability and reusability, and still has good SERS enhancement effect and clean background signal after repeated use.
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