Detection of Polynitro Compounds at Low Concentrations by SERS Using Ni@Au Nanotubes

The identification of high-energy compounds in trace concentrations not only the laboratory, but also field conditions is particular interest. process should be clear, easy, and well-recognizable. We formed SERS-active substrates by using elongated nickel nanotubes synthesized electrochemical deposition pores ion-track membranes coated them with gold for further application detection low analytes. were characterized various techniques to determine morphology modifying layer. possibility obtaining two types gold-layer was shown: form a smooth film up 20–50 nm thick coating nanoneedles 250 long. electric fields around simulated at laser wavelength 532 demonstrate influence on distribution. “needle” chosen most effective aromatic polynitro compounds. spectral peaks identified comparing model experimental Raman spectra down 10?5 M. Within this limit, all (“fingerprints” substance) clearly distinguishable.