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Open AccessArticle

Second Harmonic Generation for Moisture Monitoring in Dimethoxyethane at a Gold-Solvent Interface Using Plasmonic Structures

Department of Chemistry, BINA Nano Center for Advanced Materials, Bar-Ilan University, 5290002 Ramat-Gan, Israel
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Nanomaterials 2019, 9(12), 1788; https://doi.org/10.3390/nano9121788
Received: 29 October 2019 / Revised: 9 December 2019 / Accepted: 12 December 2019 / Published: 16 December 2019
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) 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. View Full-Text
Keywords: second harmonic generation (SHG); plasmonic enhancement; second-order nonlinear susceptibility; battery second harmonic generation (SHG); plasmonic enhancement; second-order nonlinear susceptibility; battery
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Aharon, H.; Shavit, O.; Galanty, M.; Salomon, A. Second Harmonic Generation for Moisture Monitoring in Dimethoxyethane at a Gold-Solvent Interface Using Plasmonic Structures. Nanomaterials 2019, 9, 1788.

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