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Quantifying Double-Layer Potentials at Liquid–Gas Interfaces from Vibrational Sum-Frequency Generation
[Image: see text] Vibrational sum-frequency generation (SFG) spectroscopy is demonstrated as a fast method to quantify variations of the electric double-layer potential ϕ(0) at liquid–gas interfaces. For this, mixed solutions of nonionic tetraethyleneglycol-monodecylether (C(10)E(4)) and cationic he...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6354727/ https://www.ncbi.nlm.nih.gov/pubmed/30713590 http://dx.doi.org/10.1021/acs.jpcc.8b10097 |
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author | García Rey, Natalia Weißenborn, Eric Schulze-Zachau, Felix Gochev, Georgi Braunschweig, Björn |
author_facet | García Rey, Natalia Weißenborn, Eric Schulze-Zachau, Felix Gochev, Georgi Braunschweig, Björn |
author_sort | García Rey, Natalia |
collection | PubMed |
description | [Image: see text] Vibrational sum-frequency generation (SFG) spectroscopy is demonstrated as a fast method to quantify variations of the electric double-layer potential ϕ(0) at liquid–gas interfaces. For this, mixed solutions of nonionic tetraethyleneglycol-monodecylether (C(10)E(4)) and cationic hexadecyltrimethylammonium bromide (C(16)TAB) surfactants were investigated using SFG spectroscopy and a thin-film pressure balance (TFPB). Derjaguin–Landau–Verwey–Overbeek analysis of disjoining pressure isotherms obtained with the TFPB technique provides complementary information on ϕ(0), which we apply to validate the results from SFG spectroscopy. By using a single ϕ(0) value, we can disentangle χ((2)) and χ((3)) contributions to the O–H stretching modes of interfacial water molecules in the SFG spectra. Having established the latter, we show that unknown double-layer potentials at the liquid–gas interface from solutions with different C(16)TAB/C(10)E(4) mixing ratios can be obtained from an analysis of SFG spectra and are in excellent agreement with the complementary results from the TFPB technique. |
format | Online Article Text |
id | pubmed-6354727 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-63547272019-02-01 Quantifying Double-Layer Potentials at Liquid–Gas Interfaces from Vibrational Sum-Frequency Generation García Rey, Natalia Weißenborn, Eric Schulze-Zachau, Felix Gochev, Georgi Braunschweig, Björn J Phys Chem C Nanomater Interfaces [Image: see text] Vibrational sum-frequency generation (SFG) spectroscopy is demonstrated as a fast method to quantify variations of the electric double-layer potential ϕ(0) at liquid–gas interfaces. For this, mixed solutions of nonionic tetraethyleneglycol-monodecylether (C(10)E(4)) and cationic hexadecyltrimethylammonium bromide (C(16)TAB) surfactants were investigated using SFG spectroscopy and a thin-film pressure balance (TFPB). Derjaguin–Landau–Verwey–Overbeek analysis of disjoining pressure isotherms obtained with the TFPB technique provides complementary information on ϕ(0), which we apply to validate the results from SFG spectroscopy. By using a single ϕ(0) value, we can disentangle χ((2)) and χ((3)) contributions to the O–H stretching modes of interfacial water molecules in the SFG spectra. Having established the latter, we show that unknown double-layer potentials at the liquid–gas interface from solutions with different C(16)TAB/C(10)E(4) mixing ratios can be obtained from an analysis of SFG spectra and are in excellent agreement with the complementary results from the TFPB technique. American Chemical Society 2018-12-20 2019-01-17 /pmc/articles/PMC6354727/ /pubmed/30713590 http://dx.doi.org/10.1021/acs.jpcc.8b10097 Text en Copyright © 2018 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | García Rey, Natalia Weißenborn, Eric Schulze-Zachau, Felix Gochev, Georgi Braunschweig, Björn Quantifying Double-Layer Potentials at Liquid–Gas Interfaces from Vibrational Sum-Frequency Generation |
title | Quantifying Double-Layer Potentials at Liquid–Gas
Interfaces from Vibrational Sum-Frequency Generation |
title_full | Quantifying Double-Layer Potentials at Liquid–Gas
Interfaces from Vibrational Sum-Frequency Generation |
title_fullStr | Quantifying Double-Layer Potentials at Liquid–Gas
Interfaces from Vibrational Sum-Frequency Generation |
title_full_unstemmed | Quantifying Double-Layer Potentials at Liquid–Gas
Interfaces from Vibrational Sum-Frequency Generation |
title_short | Quantifying Double-Layer Potentials at Liquid–Gas
Interfaces from Vibrational Sum-Frequency Generation |
title_sort | quantifying double-layer potentials at liquid–gas
interfaces from vibrational sum-frequency generation |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6354727/ https://www.ncbi.nlm.nih.gov/pubmed/30713590 http://dx.doi.org/10.1021/acs.jpcc.8b10097 |
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