SERS (Surface Enhanced Raman Scattering) anti-counterfeit label based on ternary Raman report molecules

Abstract

The invention relates to an SERS (Surface Enhanced Raman Scattering) anti-counterfeit label based on a ternary Raman reporter molecules, and belongs to the field of SERS spectrum coding. The preparation method comprises the following steps: firstly, mixing different Raman reporter molecules according to a certain proportion, encapsulating ternary Raman reporter molecules in core-shell gaps of gold nanorods to prepare double-layer gold rods (Au@Au NRs) coated with multi-element reporter molecules, and then assembling the Au@Au NRs into a regular and ordered gold nanofilm by using an oil-water interface self-assembly method. In the work, the good SERS effect of the double-layer gold rod is utilized to construct the anti-counterfeit label, and identification information is obtained from SERS signals of Raman reporter molecules in gaps of the gold core shell. Coding is carried out according to the characteristic peak wave number and intensity of the ternary reporter molecule, each SERS signal is digitalized to obtain two groups of code sequences, and the two groups of code sequences are combined and further coded and converted to generate the anti-counterfeit label. The ternary Raman reporter molecule SERS label can enable SERS signals to have high specificity and extremely high recognition precision, coding can further increase the secrecy and non-replicability of information, and a thought is provided for developing a novel anti-fake technology.

Description

technical field [0001] The invention relates to a SERS anti-counterfeiting label based on a ternary Raman reporter molecule, and belongs to the field of SERS spectral coding. Background technique [0002] Counterfeit and inferior goods pose a growing threat to socio-economic and public safety. Over the past few decades, various anti-counterfeiting and security technologies have been developed to combat counterfeiting, such as printing, anti-counterfeiting inks, watermarks and holograms. However, with the development of technology, some anti-counterfeiting labels have been known to counterfeiters and can be easily copied. As it stands, there is a need to continue developing new, more secure security labels to better support product authentication. Surface-enhanced Raman scattering (SERS) can provide a one-to-one corresponding specific "fingerprint" signal for the Raman reporter molecule on the surface of the metal nanoparticle, generating a unique fingerprint Raman spectrum...

AI Technical Summary

Problems solved by technology

However, with the development of technology, some anti-counterfeiting labels are already known to counterfeiters and can be easily copied

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