## 1 Introduction  
Surface-enhanced Raman scattering (SERS) is an analytical tool that can be applied to molecules, providing vibrational spectra, and which can be adsorbed on specially prepared substrates or nanoparticles in colloidal solutions for its spectral identification. Moreover, the SERS-signal of analyte molecules adsorbed on hot spots areas is amplified hundreds of times compared to the signal from randomly adsorbed molecules on the surface [1]. Hot spots on the surface can be found between adjacent plasmon nanostructures if the distance between them is less than 4 nanometers. This type of hot spot is called the \"gap hot spot\"; the calculated intensity enhancement factor (EF) of the obtained SERS-signal is of \(10^{8}\)-\(10^{10}\)[1, 2]. Greater EF was presented for the case when a gold tip was on the top of a planar gold surface, so-called TERS EF, that may be up to \(10^{11}\) in the nanometergap [2]. This enhancement is due to the strong modifications of local fields, that also change the luminescence properties [3; 4; 5]. The analysis of fine structured electronic-vibrational luminescence spectra is also quite a productive analytical method, but usually at cryogenic conditions [6; 7], as well as comparison of data on phenoluminescence and Raman scattering [8]. Considering the influence of local fields, it is also important to take into account their fluctuations in dielectric solutions, thus enhancement parameters may vary from molecule to molecule [9; 10], as well as the structure of plasmonic near field [11]. All together this gives the route towards analytical sensitivity up to the level of single molecules, quantum dots, and nanoparticles. Gap hot spots are formed inside gaps between two or more particles of any shape, inside cavities, or crevices [12; 13]. Gap hot spots form mostly during the aggregation of colloidal solutions producing disordered noble nanoparticle clusters, in which interstitial gaps correlate with achievable field enhancement. In view of the colloidal solutions instability and low reproducibility of the SERS-signal, for obtaining the spectrum of an analyte of lower concentration it is better to use solid substrates [14]. Gap hot spots also may be formed on the adaptive silver films (ASFs) in which a protein solution can slightly dissolve the Ag-particle surface to make them movable and therefore perfectly match different analytes [15]. Thus, the substrates with ordered geometry have undoubtable advantages. Another type of hot spot, known as the \"tip hot spot\", is formed near any single nanosized roughness with a high surface curvature at the poles of the nanosphere, at the tips of nanorods, and nanotriangles due to the lightning-rod effect [13], or other types of metal nanoclusters on surfaces and/or nanoantennas [16; 17]. In this case, there is a significant increase in the electromagnetic field intensity associated with the concentration of its electric component on nanoscale tips or irregularities. As an example, substrates with arrays of nanowires (NWs) [18; 19; 20] provide SERS EF up to \(10^{7}\). Also, a higher aspect ratio (length to diameter) demonstrates a bigger enhancement factor [21; 22; 23]. Moreover, SERS substrates with the NWs array may demonstrate bigger EF due to the NWs leaning feature that is caused by capillary force. It can be easily observed on substrates with silicon nanopillars made by maskless dry etching and coated with silver [24]. As a result of the analyte adsorption and drying, the analyte molecules appear to be sandwiched between neighboring nanopillars, that is, in the hot spot area and demonstrating strong signal amplification. This synthesis strategy allows varying of nanopillar length and diameter without using a template, but this strategy is costly and time-consuming. This is the reason why synthesis with templates is preferred. This paper represents a simple strategy for the fabrication of the SERS-active substrates by the template synthesis on commercial track membrane (TM).