Directional motion of Gallium-based liquid metal induced by asymmetric chemical surrounding
Journal article
Wang, B., Wang, Q., Zhang Y.W, Zhang Y.C., Li Y. and Zhao, D. (2023). Directional motion of Gallium-based liquid metal induced by asymmetric chemical surrounding. Journal of Chemical Education. 100 (8), pp. 3156-3161. https://doi.org/10.1021/acs.jchemed.3c00311
| Authors | Wang, B., Wang, Q., Zhang Y.W, Zhang Y.C., Li Y. and Zhao, D. |
|---|---|
| Abstract | Interfacial, or surface tension, is a significant topic in chemical education. This paper describes the directional motion of gallium-based liquid metal drops, resulting from a difference of interfacial tension across the drop. This demonstration can engage students in discovering the underlying chemical principles. A mechanism for the drop’s directional motion is proposed to provide insight into this intriguing phenomenon. It appears that unbalanced chemical environments cause different physical or chemical processes to occur on each hemisphere of the drop, such as a pH difference, redox reactions, galvanic replacement, or adsorption. As a result, a difference in the interfacial tension across the drop is generated, providing the driving force that acts on the drop. This demonstration can be used to introduce the fundamental principles in chemical reactions, such as redox activity, electrical double-layer formation, and interfacial tension. |
| Keywords | First-Year Undergraduate/General, Upper-Divison Undergraduate, Interfacial/Surface Tension, Electrochemistry, Electrical Double Layer, Surface Science |
| Year | 2023 |
| Journal | Journal of Chemical Education |
| Journal citation | 100 (8), pp. 3156-3161 |
| Publisher | American Chemical Society (ACS) |
| ISSN | 1938-1328 |
| Digital Object Identifier (DOI) | https://doi.org/10.1021/acs.jchemed.3c00311 |
| Web address (URL) | https://doi.org/10.1021/acs.jchemed.3c00311 |
| Publication dates | |
| 23 Jul 2023 | |
| Publication process dates | |
| Accepted | 13 Jul 2023 |
| Deposited | 25 Jul 2023 |
| Accepted author manuscript | License File Access Level Open |
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Accepted author manuscript
| Accepted manuscript-directional motion.pdf | ||
| License: CC BY 4.0 | ||
| File access level: Open | ||
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