| abstract |
The invention relates to a preparation method of an anti-counterfeiting film based on double-layer gold nanorods, and belongs to the field of composite materials. In this method, Au NRs were first prepared by seed growth method, and then Au@Au NRs were prepared and different Raman probes were encapsulated in the core-shell gap of Au@Au NRs. Au@Au NRs films with different Raman probes and transferred onto PDMS substrates. Because different Raman probes correspond to unique SERS signals, using them to make anti-counterfeiting security labels can give products non-reproducible and highly recognizable security information, so as to identify counterfeit and shoddy products. |