Diffuse-charge dynamics across a capacitive interface in a DC electric field
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866910831125463040 |
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| author | Zhao, Shuozhen Balu, Bhavya Yu, Zongxin Miksis, Michael J. Vlahovska, Petia M. |
| author_facet | Zhao, Shuozhen Balu, Bhavya Yu, Zongxin Miksis, Michael J. Vlahovska, Petia M. |
| contents | Cells and cellular organelles are encapsulated by nanometrically thin membranes whose main component is a lipid bilayer. In the presence of electric fields, the ion-impermeable lipid bilayer acts as a capacitor and supports a potential difference across the membrane. We analyze the charging dynamics of a planar membrane separating bulk solutions with different electrolyte concentrations upon the application of an applied uniform DC electric field. The membrane is modeled as a zero-thickness capacitive interface. The evolution of the electric potential and ions distributions in the bulk are solved for using the Poisson-Nernst-Planck (PNP) equations. Asymptotic solutions are derived in the limit of thin Debye layers and weak fields (compared to the thermal electric potential). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_11319 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Diffuse-charge dynamics across a capacitive interface in a DC electric field Zhao, Shuozhen Balu, Bhavya Yu, Zongxin Miksis, Michael J. Vlahovska, Petia M. Soft Condensed Matter Biological Physics Cells and cellular organelles are encapsulated by nanometrically thin membranes whose main component is a lipid bilayer. In the presence of electric fields, the ion-impermeable lipid bilayer acts as a capacitor and supports a potential difference across the membrane. We analyze the charging dynamics of a planar membrane separating bulk solutions with different electrolyte concentrations upon the application of an applied uniform DC electric field. The membrane is modeled as a zero-thickness capacitive interface. The evolution of the electric potential and ions distributions in the bulk are solved for using the Poisson-Nernst-Planck (PNP) equations. Asymptotic solutions are derived in the limit of thin Debye layers and weak fields (compared to the thermal electric potential). |
| title | Diffuse-charge dynamics across a capacitive interface in a DC electric field |
| topic | Soft Condensed Matter Biological Physics |
| url | https://arxiv.org/abs/2502.11319 |