The capability of brass as a real time substrate for surface enhanced Raman scattering applications is investigated. In this article, we showed that, using just the ultra-pure water as the electrolyte and the brass electrodes, ions extracted from the anode form nanoparticles on the anode surface in matter of minutes, and these nanoparticles are used for enhancing Raman signal intensity in real time. We observed enhancement factor of more than five orders of magnitude in Raman spectrum of Rhodamine B. We show that the nanoparticles formed on the brass anode surface are copper oxide nanoparticles and the enhancement of Raman signal intensity is due to these (copper oxide) nanoparticles. The zinc atoms do not affect the enhancement factor due to absence of zinc oxide nanoparticles on the anode surface. We present number of reasons to support this view in detail.
In this work, we utilize the electrolysis effect to prepare a semi-colloidal substrate for surface enhanced Raman spectroscopy (SERS) applications in which the nanoparticles created on the anode surface act as an active medium for SERS. The experiments carried out with copper (Cu) as the electrode and Rhodamine B (RhB) as the electrolyte. The measured enhancement factor (EF) of the Raman peaks of RhB is more than five orders of magnitude. The proposed method has some key advantages: it is a very simple and low cost technique and also can be used in real time since it is a quite fast process.
In this work we have proposed a new configuration based on a tilted charged coupled device (CCD) camera and bandpass sampling theorem which not only decreases the spectrometer size but also operates in the traditional spectrometers wavelength range of 400 nm – 1100 nm. The static Michelson interferometer is built by attaching a quartz cube and a prism together, and a CCD camera is attached to the quartz cube in 45 degree to record path length differences (PLD). An algorithm is developed to process the signal and calculate the Fourier transform of the recorded interferograms on the CCD camera.