Abstract
The solutal Marangoni effect is attracting increasing interest because of its fundamental role in many isothermal directional transport processes in fluids, including the Marangoni-driven spreading on liquid surfaces or Marangoni convection within a liquid. Here we report a type of continuous Marangoni transport process resulting from Marangoni-driven spreading and Marangoni convection in an aqueous two-phase system. The interaction between a salt (CaCl2) and an anionic surfactant (sodium dodecylbenzenesulfonate) generates surface tension gradients, which drive the transport process. This Marangoni transport consists of the upward transfer of a filament from a droplet located at the bottom of a bulk solution, coiling of the filament near the surface, and formation of Fermat’s spiral patterns on the surface. The bottom-up coiling of the filament, driven by Marangoni convection, may inspire automatic fiber fabrication. © The Author(s) 2022.
| Original language | English |
|---|---|
| Article number | 7206 |
| Journal | Nature Communications |
| Volume | 13 |
| Online published | 23 Nov 2022 |
| DOIs | |
| Publication status | Published - 2022 |
| Externally published | Yes |
Funding
We thank Dr. Wei Guo, Ms. Yafeng Yu, and Dr. Qingchuan Li for helpful discussions. This work was supported by the General Research Fund (Nos. 17306820, 17306221, and 17305518) and the Research Impact Fund (No. R7072-18) from the Research Grants Council of Hong Kong, as well as the Excellent Young Scientists Fund (Hong Kong and Macau) (21922816) from the National Natural Science Foundation of China (NSFC). H. C. Shum was funded in part by the Croucher Senior Research Fellowship from the Croucher Foundation.
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/