Nanoscale Seebeck effect at hot metal nanostructures
We theoretically study the electrolyte Seebeck effect in the vicinity of a heated metal nanostructure, such as the cap of an active Janus colloid in an electrolyte, or gold-coated interfaces in optofluidic devices. The thermocharge accumulated at the surface varies with the local temperature, thus m...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2018-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aaa266 |
| _version_ | 1797750715498627072 |
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| author | Aboubakry Ly Arghya Majee Alois Würger |
| author_facet | Aboubakry Ly Arghya Majee Alois Würger |
| author_sort | Aboubakry Ly |
| collection | DOAJ |
| description | We theoretically study the electrolyte Seebeck effect in the vicinity of a heated metal nanostructure, such as the cap of an active Janus colloid in an electrolyte, or gold-coated interfaces in optofluidic devices. The thermocharge accumulated at the surface varies with the local temperature, thus modulating the diffuse part of the electric double layer. On a conducting surface with non-uniform temperature, the isopotential condition imposes a significant polarization charge within the metal. Surprisingly, this does not affect the slip velocity, which takes the same value on insulating and conducting surfaces. Our results for specific-ion effects agree qualitatively with recent observations for Janus colloids in different electrolyte solutions. Comparing the thermal, hydrodynamic, and ion diffusion time scales, we expect a rich transient behavior at the onset of thermally powered swimming, extending to microseconds after switching on the heating. |
| first_indexed | 2024-03-12T16:37:54Z |
| format | Article |
| id | doaj.art-d5a8a5dfed4645fc9c7369f775542e43 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:37:54Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-d5a8a5dfed4645fc9c7369f775542e432023-08-08T14:50:06ZengIOP PublishingNew Journal of Physics1367-26302018-01-0120202500110.1088/1367-2630/aaa266Nanoscale Seebeck effect at hot metal nanostructuresAboubakry Ly0Arghya Majee1https://orcid.org/0000-0002-0411-3948Alois Würger2https://orcid.org/0000-0003-1499-1960Laboratoire Ondes et Matière d’Aquitaine, Université de Bordeaux & CNRS , F-33405 Talence, FranceMax-Planck-Institut für Intelligente Systeme , D-70569 Stuttgart, Germany; IV. Institut für Theoretische Physik, Universität Stuttgart , D-70569 Stuttgart, GermanyLaboratoire Ondes et Matière d’Aquitaine, Université de Bordeaux & CNRS , F-33405 Talence, FranceWe theoretically study the electrolyte Seebeck effect in the vicinity of a heated metal nanostructure, such as the cap of an active Janus colloid in an electrolyte, or gold-coated interfaces in optofluidic devices. The thermocharge accumulated at the surface varies with the local temperature, thus modulating the diffuse part of the electric double layer. On a conducting surface with non-uniform temperature, the isopotential condition imposes a significant polarization charge within the metal. Surprisingly, this does not affect the slip velocity, which takes the same value on insulating and conducting surfaces. Our results for specific-ion effects agree qualitatively with recent observations for Janus colloids in different electrolyte solutions. Comparing the thermal, hydrodynamic, and ion diffusion time scales, we expect a rich transient behavior at the onset of thermally powered swimming, extending to microseconds after switching on the heating.https://doi.org/10.1088/1367-2630/aaa266active colloidselectrolyte Seebeck effecthot particlesthermophoresisthermoplasmonicsthermopotential |
| spellingShingle | Aboubakry Ly Arghya Majee Alois Würger Nanoscale Seebeck effect at hot metal nanostructures New Journal of Physics active colloids electrolyte Seebeck effect hot particles thermophoresis thermoplasmonics thermopotential |
| title | Nanoscale Seebeck effect at hot metal nanostructures |
| title_full | Nanoscale Seebeck effect at hot metal nanostructures |
| title_fullStr | Nanoscale Seebeck effect at hot metal nanostructures |
| title_full_unstemmed | Nanoscale Seebeck effect at hot metal nanostructures |
| title_short | Nanoscale Seebeck effect at hot metal nanostructures |
| title_sort | nanoscale seebeck effect at hot metal nanostructures |
| topic | active colloids electrolyte Seebeck effect hot particles thermophoresis thermoplasmonics thermopotential |
| url | https://doi.org/10.1088/1367-2630/aaa266 |
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