Determining the Dielectric Constant of Solid/Liquid Interfaces
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866929399349116928 |
|---|---|
| author | Dadashi, Somaiyeh Adhikari, Narendra M. Li, Hao Piontek, Stefan M. Wang, Zheming Rosso, Kevin M. Borguet, Eric |
| author_facet | Dadashi, Somaiyeh Adhikari, Narendra M. Li, Hao Piontek, Stefan M. Wang, Zheming Rosso, Kevin M. Borguet, Eric |
| contents | The dielectric constant ($\varepsilon^{\prime}$) of interfacial water is an important parameter, but its measurement has posed challenges, and no consensus has been reached on a generalized expression. We derived a formula for $\varepsilon^{\prime}$ of a buried interface using the slab model for a half-solvated sphere: $ \varepsilon^{\prime}=\varepsilon_1 \varepsilon_2\left(\varepsilon_2-\varepsilon_1+6\right) / 2\left(2 \varepsilon_2+\varepsilon_1\right)$, where $\varepsilon_1$ and $\varepsilon_2$ are the dielectric constants of the solid and liquid phases, respectively. We experimentally validated this expression using vibrational sum frequency generation and Fresnel factor calculations for interfaces of alumina with water ($ \mathrm{H_2O} $ and $ \mathrm{D_2O} $) and acetonitrile. This fills an important knowledge gap in the description of the dielectric constant of interfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_15964 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Determining the Dielectric Constant of Solid/Liquid Interfaces Dadashi, Somaiyeh Adhikari, Narendra M. Li, Hao Piontek, Stefan M. Wang, Zheming Rosso, Kevin M. Borguet, Eric Chemical Physics Materials Science The dielectric constant ($\varepsilon^{\prime}$) of interfacial water is an important parameter, but its measurement has posed challenges, and no consensus has been reached on a generalized expression. We derived a formula for $\varepsilon^{\prime}$ of a buried interface using the slab model for a half-solvated sphere: $ \varepsilon^{\prime}=\varepsilon_1 \varepsilon_2\left(\varepsilon_2-\varepsilon_1+6\right) / 2\left(2 \varepsilon_2+\varepsilon_1\right)$, where $\varepsilon_1$ and $\varepsilon_2$ are the dielectric constants of the solid and liquid phases, respectively. We experimentally validated this expression using vibrational sum frequency generation and Fresnel factor calculations for interfaces of alumina with water ($ \mathrm{H_2O} $ and $ \mathrm{D_2O} $) and acetonitrile. This fills an important knowledge gap in the description of the dielectric constant of interfaces. |
| title | Determining the Dielectric Constant of Solid/Liquid Interfaces |
| topic | Chemical Physics Materials Science |
| url | https://arxiv.org/abs/2406.15964 |