Preparation method of silver-based nano pointed cone array SERS (surface enhanced Raman scattering) substrate with LSPR (local surface plasmon resonance) effect

The invention relates to a preparation method of a silver-based nano pointed cone array SERS (Surface Enhanced Raman Scattering) substrate with an LSPR (Localized Surface Plasmon Resonance) effect, which comprises the following steps: step 1, preparing a PS (Poly Styrene) film which is colorless and transparent and has no holes in the surface and is the premise for preparing a nano pointed cone array structure; step 2, obtaining a PS template with a nano pointed cone array structure through hot stamping; step 3, carrying out etching treatment on the PS pointed cone template obtained in the step 2 to obtain a high-repeatability micro-nano pointed cone array template; 4, the PS pointed cone template treated in the step 3 is subjected to evaporation treatment, and the SERS substrate of the precious metal-based nano pointed cone array is obtained. According to the method, controllable preparation of the large-area precious metal-based nano pointed cone array structure is realized at low cost based on modes of nan