Recently, SERS based on nano dendritic structures have also been reported. Techniques used to obtain the dendrites include galvanic displacement and chemical methods . Direct electrochemical methods are also used and generally require the addition of surfactants or additional chemicals to stabilize the growth . In those reports, the SERS nanodendrites were grown in 3D . While this provides a higher density of hot spots and therefore higher Raman enhancement, these structures are more prone to be washed away during cleaning steps and when carrying out the analysis in aqueous conditions.