Observation of Molecular Association at Liquid/Liquid and Solid/Liquid Interfaces by Second Harmonic Generation Spectroscopy

2000 ◽  
Vol 104 (51) ◽  
pp. 12091-12094 ◽  
Author(s):  
Tatsuya Uchida ◽  
Akira Yamaguchi ◽  
Tomomi Ina ◽  
Norio Teramae
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Molecular Association ◽  
Liquid Interfaces ◽  
Solid Liquid ◽  
Second Harmonic Generation Spectroscopy

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

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1788
Author(s):  
Hannah Aharon ◽  
Omer Shavit ◽  
Matan Galanty ◽  
Adi Salomon
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Gold Electrode ◽  
Second Harmonic ◽  
Liquid Interfaces ◽  
Metal Interface ◽  
Liquid Electrode ◽  
Plasmonic Structures ◽  
Electrode Interface ◽  
Solid Liquid

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.

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