The Spectrum Of The Composite Lb Film Modified Silver Electrode

Surface-enhanced Raman spectroscopy (SERS) technique is now the scene of the most sensitive study of surface adsorption and interfacial reactions at the scene of one of spectroscopy, SERS technology and continuously improve the sensitivity of expanding the scope of application has greatly increased the power from the study of the molecular level chemical process system, the spectral method with conventional electrochemical methods of combining electrochemical spectroscopy (Spectroelectrochemistry) has become the scene at the molecular level characterization and study of the main means of electrochemical system, which the electrode surface in the study of molecular species orientation, structure, bonding, as well as analysis of the surface of the electrode materials of structural changes in the electrochemical process involved in identification of molecular species have highlighted the advantages and eye-catching results.Electrochemical reaction is in the inorganic ions and organic ions in the electrolyte solution in support of the, for the organic electrolyte solution, as in organic solvents may change the nature of the detection elements, or even react with the organic solvents, and organic solvent itself a strong Raman signal, which may affect or even cover up the detection of molecular Raman signal, the spectrum of the probe molecules have a big impact, so the organic electrolytes are rarely used to study the electrochemical spectroscopy. In inorganic electrolytes, the most commonly used and most important is the solvent water, the Raman scattering is very weak absorption in the visible does not, therefore, Raman spectroscopy is particularly suitable for testing in aqueous solution, can more accurately reflect the molecular characteristics. But in reality, we have studied many of the molecules do not dissolve in water, in order to resolve this problem, people think of the "drop-coating" of organic molecules on the electrode dripping, and then transferred to the electrochemical spectrum mining pool. However, this approach is inadequate in many ways, for example, it is very difficult molecule adsorption to the electrode surface, the formation of the film uniformity is not ideal, but with the spectrum taken a lot of elements to be falling off very easily, the thickness of the molecular layer is difficult grasp. In order to overcome the above shortcomings, we have introduced a better way-LB membrane. Soluble in organic molecular film-forming solution through the LB film technology monolayer of organic molecules or multi-layer transferred to the substrate.In this article, we use C60 was prepared by LB as well as non-soluble molecules of water molecules of the monolayer ATP, and its high-quality SERS spectra. SERS spectra obtained through the analysis, we can see that because of the symmetry of C60 molecules decreased peak splitting arising from the experimental results, we prove that good this conclusion. At the same time, we also C60LB silver composite film electrode with the voltage changes in SERS analysis and discussion, to draw a better conclusion. At the same time, ATP LB films found a negative shift with the potential, ATP silver electrode surface in the relative peak intensity and peak changes have taken place in the larger, surface adsorption of ATP molecules and silver nanoparticles occurred in the chemical adsorption, by the spectral analysis of peak change, ATP molecules adsorbed on silver surface by the constant vertical tilt up to parallel adsorption on the surface...