SERS Optimization Of Gold Nanocylinders Arrays: Influence Of The Surrounding Medium And Application For Polycyclic Aromatic Hydrocarbons Detection

摘要

This study describes the effect of the surrounding medium on the SERS efficiency using nanolithographied substrates on which Polycyclic Aromatic Hydrocarbons are investigated. We will show that the optimum nanocylinder size is shifted to lower diameter by increasing the dielectric constant of the liquid medium. This rule is discussed in terms of Localized Surface Plasmon Resonance since its position influences directly SERS intensity. This study is done for two excitation wavelengths: 632.8 nm and 785 nm. The aim of this work is collect information in order to product future active SERS sensors suitable for in situ environmental analysis.