Second harmonic generation for moisture monitoring in dimethoxyethane at a gold-solvent interface using plasmonic structures

Matan Galanty, Adi Salomon

Research output: Contribution to journalArticlepeer-review

Abstract

Second harmonic generation (SHG) is forbidden from most bulk metals because metals are characterized by centrosymmetric symmetry. Adsorption or desorption of molecules at the metal interface can break the symmetry and lead to SHG responses. Yet, the response is relatively low, and minute changes occurring at the interface, especially at solid/liquid interfaces, like in battery electrodes are difficult to assess. Herein, we use a plasmonic structure milled in a gold electrode to increase the overall SHG signal from the interface and gain information about small changes occurring at the interface. Using a specific homebuilt cell, we monitor changes at the liquid/electrode interface. Specifically, traces of water in dimethoxyethane (DME) due have been detected following changes in the SHG responses from the plasmonic structures. We propose that by plasmonic structures this technique can be used for assessing minute changes occurring at solid/liquid interfaces such as battery electrodes.

Original languageEnglish
Article number1788
JournalNanomaterials
Volume9
Issue number12
DOIs
StatePublished - Dec 2019

Keywords

  • Battery
  • Plasmonic enhancement
  • Second harmonic generation (SHG)
  • Second-order nonlinear susceptibility

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)

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