Abstract
The first in situ Raman spectroelectrochemical measurements on thin films of Hg2Cl2, Hg2Br2 and HgO formed on small droplets of mercury electrochemically deposited on inert substrates are illustrated in Fig. 1.1 These experiments already showed that as little as two monolayers of the solid phases could be detected on a liquid substrate using the spectrometer systems then available. Since that time there has been only a limited number of measurements of the formation of solid phases on electrodes (such as of Pb(OH)xCl species formed on lead electrodes in aqueous chloride solutions of varying pH3 as well as of non-electrochem.ical corrosion films on lead4). Although measurements on systems of this type would undoubtedly be important both in the basic study of corrosion as well as in the investigation of the mechanisms of the surface enhancement of Raman spectra (especially experiments on liquid substrates, including droplets of defined size), the bulk of the work so far has been concerned with the investigation of enhanced spectra of molecules and ions adsorbed at silver, copper and gold electrodes (see Table 1).
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Editors’ note: This structure has now been identified with inelastic Mie scattering from the silver itself. See D. A. Weitz, T. J. Gramila, and A. Z. Genack in this volume.
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Fleischmann, M., Hill, I.R. (1982). Electrochemical Effects. In: Chang, R.K., Furtak, T.E. (eds) Surface Enhanced Raman Scattering. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9257-0_14
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DOI: https://doi.org/10.1007/978-1-4615-9257-0_14
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