Abstract
The interaction between plasmonic nanoparticles (PNPs) is of the utmost importance for the optimal design of surface enhanced Raman spectroscopy (SERS) substrates. This interaction can either quench or enhance the strength of the localized plasmon resonance of nanoparticles depending on the size of the PNPs themselves, the pores between them, their size distribution and spatial locations. Variating the degree of porosity opened wide prospects to realize both localized surface plasmon resonance and plasmon polariton resonance on the same material. All these features make it possible to create a new type of tunable SERS substrates using wedge-shaped porous gold structures with variable properties. This paper conceptually describes the technology for obtaining such structures, developed in the frame of the NANO SPS G5140 project (ANT-MUSE).
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