Cargando…
Liquid metal droplets bouncing higher on thicker water layer
Liquid metal (LM) has gained increasing attention for a wide range of applications, such as flexible electronics, soft robots, and chip cooling devices, owing to its low melting temperature, good flexibility, and high electrical and thermal conductivity. In ambient conditions, LM is susceptible to t...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10267135/ https://www.ncbi.nlm.nih.gov/pubmed/37316489 http://dx.doi.org/10.1038/s41467-023-39348-x |
_version_ | 1785058866556305408 |
---|---|
author | Dai, Yuhang Li, Minfei Ji, Bingqiang Wang, Xiong Yang, Siyan Yu, Peng Wang, Steven Hao, Chonglei Wang, Zuankai |
author_facet | Dai, Yuhang Li, Minfei Ji, Bingqiang Wang, Xiong Yang, Siyan Yu, Peng Wang, Steven Hao, Chonglei Wang, Zuankai |
author_sort | Dai, Yuhang |
collection | PubMed |
description | Liquid metal (LM) has gained increasing attention for a wide range of applications, such as flexible electronics, soft robots, and chip cooling devices, owing to its low melting temperature, good flexibility, and high electrical and thermal conductivity. In ambient conditions, LM is susceptible to the coverage of a thin oxide layer, resulting in unwanted adhesion with underlying substrates that undercuts its originally high mobility. Here, we discover an unusual phenomenon characterized by the complete rebound of LM droplets from the water layer with negligible adhesion. More counterintuitively, the restitution coefficient, defined as the ratio between the droplet velocities after and before impact, increases with water layer thickness. We reveal that the complete rebound of LM droplets originates from the trapping of a thinly low-viscosity water lubrication film that prevents droplet-solid contact with low viscous dissipation, and the restitution coefficient is modulated by the negative capillary pressure in the lubrication film as a result of the spontaneous spreading of water on the LM droplet. Our findings advance the fundamental understanding of complex fluids’ droplet dynamics and provide insights for fluid control. |
format | Online Article Text |
id | pubmed-10267135 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-102671352023-06-15 Liquid metal droplets bouncing higher on thicker water layer Dai, Yuhang Li, Minfei Ji, Bingqiang Wang, Xiong Yang, Siyan Yu, Peng Wang, Steven Hao, Chonglei Wang, Zuankai Nat Commun Article Liquid metal (LM) has gained increasing attention for a wide range of applications, such as flexible electronics, soft robots, and chip cooling devices, owing to its low melting temperature, good flexibility, and high electrical and thermal conductivity. In ambient conditions, LM is susceptible to the coverage of a thin oxide layer, resulting in unwanted adhesion with underlying substrates that undercuts its originally high mobility. Here, we discover an unusual phenomenon characterized by the complete rebound of LM droplets from the water layer with negligible adhesion. More counterintuitively, the restitution coefficient, defined as the ratio between the droplet velocities after and before impact, increases with water layer thickness. We reveal that the complete rebound of LM droplets originates from the trapping of a thinly low-viscosity water lubrication film that prevents droplet-solid contact with low viscous dissipation, and the restitution coefficient is modulated by the negative capillary pressure in the lubrication film as a result of the spontaneous spreading of water on the LM droplet. Our findings advance the fundamental understanding of complex fluids’ droplet dynamics and provide insights for fluid control. Nature Publishing Group UK 2023-06-14 /pmc/articles/PMC10267135/ /pubmed/37316489 http://dx.doi.org/10.1038/s41467-023-39348-x Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Dai, Yuhang Li, Minfei Ji, Bingqiang Wang, Xiong Yang, Siyan Yu, Peng Wang, Steven Hao, Chonglei Wang, Zuankai Liquid metal droplets bouncing higher on thicker water layer |
title | Liquid metal droplets bouncing higher on thicker water layer |
title_full | Liquid metal droplets bouncing higher on thicker water layer |
title_fullStr | Liquid metal droplets bouncing higher on thicker water layer |
title_full_unstemmed | Liquid metal droplets bouncing higher on thicker water layer |
title_short | Liquid metal droplets bouncing higher on thicker water layer |
title_sort | liquid metal droplets bouncing higher on thicker water layer |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10267135/ https://www.ncbi.nlm.nih.gov/pubmed/37316489 http://dx.doi.org/10.1038/s41467-023-39348-x |
work_keys_str_mv | AT daiyuhang liquidmetaldropletsbouncinghigheronthickerwaterlayer AT liminfei liquidmetaldropletsbouncinghigheronthickerwaterlayer AT jibingqiang liquidmetaldropletsbouncinghigheronthickerwaterlayer AT wangxiong liquidmetaldropletsbouncinghigheronthickerwaterlayer AT yangsiyan liquidmetaldropletsbouncinghigheronthickerwaterlayer AT yupeng liquidmetaldropletsbouncinghigheronthickerwaterlayer AT wangsteven liquidmetaldropletsbouncinghigheronthickerwaterlayer AT haochonglei liquidmetaldropletsbouncinghigheronthickerwaterlayer AT wangzuankai liquidmetaldropletsbouncinghigheronthickerwaterlayer |