Optics and Spectroscopy

, Volume 119, Issue 4, pp 664–665 | Cite as

To the theory of the first layer effect in surface enhanced spectroscopy

Condensed-Matter Spectroscopy

Abstract

It is demonstrated that the primary enhancement of SEIRA, SERS and SEHRS signals arising from the first layer of adsorbed molecules is associated not with the so-called “chemical enhancement,” as it is well accepted in literature, but with a pure electrodynamical effect. Its nature is associated with a very strong difference in the values of the electric field and its derivatives in the first, second and the next layers of adsorbed molecules in the areas of so-called “active sites” or “hot spots.”

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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  1. 1.A. F. Ioffe Physico-Technical InstituteRussian Academy of SciencesSt. PetersburgRussia
  2. 2.The ITMO UniversitySt. PetersburgRussia

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