Surface-enhanced Raman scattering (SERS) induced structure transfer method for rubbing techniques
View Patent ↗Since the transfer of an SERS induced structure according to an embodiment of the disclosure uses the interfacial energy between a water surface and a thin film substructure, it is possible to perform the transfer intact without any damage to the structure. At this time, the SERS induced structure is transferred onto a non-uniform and rough surface, wherein since the transfer structure covers the surface, various types of flexible materials may be used. As a result, Raman signals and laser scattering are minimized, thereby increasing signal reproducibility, and various physical properties of a transfer target may be applied to rubbing techniques.
1 . A method for transferring an SERS induced structure, the method comprising:
forming a water-soluble thin film on a substrate;
manufacturing a surface-enhanced Raman scattering (SERS) induced structure on the water-soluble thin film;
separating the SERS induced structure from the substrate through capillary separation, wherein the capillary separation comprises dissolving the water-soluble thin film upon contact with water to release the SERS induced structure from the substrate; and
transferring the separated SERS induced structure onto a flexible material through the capillary force of water.
2 . The method of claim 1 , wherein a water-soluble material forming the water-soluble thin film is selected from the group consisting of polyvinyl alcohol, polyethylene glycol, dextran, polyvinylpyrrolidone, carboxymethylcellulose, salmon DNA, sodium chloride, ammonium sulfate, or ammonium persulfate.
3 . The method of claim 1 , wherein the thickness of the water-soluble thin film is 10 nm to 100 nm.
4 . The method of claim 1 , wherein the manufacturing of the SERS induced structure comprises manufacturing a metal nanostructure or manufacturing a polymer thin film-based structure.
5 . The method of claim 1 , wherein in the separating of the SERS induced structure, the SERS induced structure, water-soluble thin film, and substrate are simultaneously immersed in water and the substrate is placed into the water at a slower rate than the separation rate of the water-soluble thin film.
6 . The method of claim 1 , wherein in the separating of the SERS induced structure, the moment the SERS induced structure, water-soluble thin film, and substrate touch water, the water-soluble thin film is dissolved and the SERS induced structure is separated from the substrate.
7 . The method of claim 1 , wherein the separated SERS induced structure is a self-supporting structure that floats on a water surface based on the surface energy of water.
8 . The method of claim 1 , wherein the transferring of the separated SERS induced structure further comprises post-transfer heating.
9 . The method of claim 8 , wherein the heating is performed at 50 to 90° C.
10 . A flexible SERS substrate manufactured by transferring and drying an SERS induced structure on a flexible material according to claim 1 .
11 . The flexible SERS substrate of claim 10 , wherein the SERS substrate is prepared using a rubbing technique.
12 . The flexible SERS substrate of claim 11 , wherein the transferred SERS induced structure covers the surface of the flexible material.