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Phase-referenced nonlinear spectroscopy of the α-quartz/water interface
Probing the polarization of water molecules at charged interfaces by second harmonic generation spectroscopy has been heretofore limited to isotropic materials. Here we report non-resonant nonlinear optical measurements at the interface of anisotropic z-cut α-quartz and water under conditions of dyn...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5159844/ https://www.ncbi.nlm.nih.gov/pubmed/27958263 http://dx.doi.org/10.1038/ncomms13587 |
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author | Ohno, Paul E. Saslow, Sarah A. Wang, Hong-fei Geiger, Franz M. Eisenthal, Kenneth B. |
author_facet | Ohno, Paul E. Saslow, Sarah A. Wang, Hong-fei Geiger, Franz M. Eisenthal, Kenneth B. |
author_sort | Ohno, Paul E. |
collection | PubMed |
description | Probing the polarization of water molecules at charged interfaces by second harmonic generation spectroscopy has been heretofore limited to isotropic materials. Here we report non-resonant nonlinear optical measurements at the interface of anisotropic z-cut α-quartz and water under conditions of dynamically changing ionic strength and bulk solution pH. We find that the product of the third-order susceptibility and the interfacial potential, χ((3)) × Φ(0), is given by (χ(1)((3))−iχ(2)((3))) × Φ(0), and that the interference between this product and the second-order susceptibility of bulk quartz depends on the rotation angle of α-quartz around the z axis. Our experiments show that this newly identified term, iχ((3)) × Φ(0), which is out of phase from the surface terms, is of bulk origin. The possibility of internally phase referencing the interfacial response for the interfacial orientation analysis of species or materials in contact with α-quartz is discussed along with the implications for conditions of resonance enhancement. |
format | Online Article Text |
id | pubmed-5159844 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-51598442016-12-20 Phase-referenced nonlinear spectroscopy of the α-quartz/water interface Ohno, Paul E. Saslow, Sarah A. Wang, Hong-fei Geiger, Franz M. Eisenthal, Kenneth B. Nat Commun Article Probing the polarization of water molecules at charged interfaces by second harmonic generation spectroscopy has been heretofore limited to isotropic materials. Here we report non-resonant nonlinear optical measurements at the interface of anisotropic z-cut α-quartz and water under conditions of dynamically changing ionic strength and bulk solution pH. We find that the product of the third-order susceptibility and the interfacial potential, χ((3)) × Φ(0), is given by (χ(1)((3))−iχ(2)((3))) × Φ(0), and that the interference between this product and the second-order susceptibility of bulk quartz depends on the rotation angle of α-quartz around the z axis. Our experiments show that this newly identified term, iχ((3)) × Φ(0), which is out of phase from the surface terms, is of bulk origin. The possibility of internally phase referencing the interfacial response for the interfacial orientation analysis of species or materials in contact with α-quartz is discussed along with the implications for conditions of resonance enhancement. Nature Publishing Group 2016-12-13 /pmc/articles/PMC5159844/ /pubmed/27958263 http://dx.doi.org/10.1038/ncomms13587 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Ohno, Paul E. Saslow, Sarah A. Wang, Hong-fei Geiger, Franz M. Eisenthal, Kenneth B. Phase-referenced nonlinear spectroscopy of the α-quartz/water interface |
title | Phase-referenced nonlinear spectroscopy of the α-quartz/water interface |
title_full | Phase-referenced nonlinear spectroscopy of the α-quartz/water interface |
title_fullStr | Phase-referenced nonlinear spectroscopy of the α-quartz/water interface |
title_full_unstemmed | Phase-referenced nonlinear spectroscopy of the α-quartz/water interface |
title_short | Phase-referenced nonlinear spectroscopy of the α-quartz/water interface |
title_sort | phase-referenced nonlinear spectroscopy of the α-quartz/water interface |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5159844/ https://www.ncbi.nlm.nih.gov/pubmed/27958263 http://dx.doi.org/10.1038/ncomms13587 |
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