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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2408.11980 |
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| _version_ | 1866913476561076224 |
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| author | Yuksel, Itir Bakis Dogru Zhang, Zhu Vreugdenhil, Marnix Mosk, Allard P. van Oosten, Dries Faez, Sanli |
| author_facet | Yuksel, Itir Bakis Dogru Zhang, Zhu Vreugdenhil, Marnix Mosk, Allard P. van Oosten, Dries Faez, Sanli |
| contents | This study introduces a straightforward electrode design featuring sharp edges with a curvature of a few hundred nanometers in radius, with which both ion accumulation and nanoparticle deposition can be observed under an alternating electrical potential. The electrodes, termed 'shark-teeth electrodes', are fabricated using a laser ablation technique optimized for facile nanostructure creation. This method involves successive, overlapping ablated discs in a thin film of gold, producing sharp tips that generate strong electric fields. When electrically polarized in an electrolyte solution, these sharp tips form a screening layer, facilitating the observation of ion and nanoparticle behavior.
A total-internal reflection microscope is employed to monitor ion accumulation on these electrodes, demonstrating their capability in iontronic microscopy. Additionally, the same electrodes are used to track nanoparticle trapping under high-frequency alternating potentials. This dual functionality allows for the investigation of electrochemical and physical interactions between ions and colloidal nanoparticles, contributing valuable insights to the field of soft matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_11980 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Laser-patterned Thin-film Electrodes: Imaging Ion Accumulation and Trapped Nanoparticles Yuksel, Itir Bakis Dogru Zhang, Zhu Vreugdenhil, Marnix Mosk, Allard P. van Oosten, Dries Faez, Sanli Soft Condensed Matter This study introduces a straightforward electrode design featuring sharp edges with a curvature of a few hundred nanometers in radius, with which both ion accumulation and nanoparticle deposition can be observed under an alternating electrical potential. The electrodes, termed 'shark-teeth electrodes', are fabricated using a laser ablation technique optimized for facile nanostructure creation. This method involves successive, overlapping ablated discs in a thin film of gold, producing sharp tips that generate strong electric fields. When electrically polarized in an electrolyte solution, these sharp tips form a screening layer, facilitating the observation of ion and nanoparticle behavior. A total-internal reflection microscope is employed to monitor ion accumulation on these electrodes, demonstrating their capability in iontronic microscopy. Additionally, the same electrodes are used to track nanoparticle trapping under high-frequency alternating potentials. This dual functionality allows for the investigation of electrochemical and physical interactions between ions and colloidal nanoparticles, contributing valuable insights to the field of soft matter. |
| title | Laser-patterned Thin-film Electrodes: Imaging Ion Accumulation and Trapped Nanoparticles |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2408.11980 |