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Self-cleaning of superhydrophobic surfaces by self-propelled jumping condensate
Open accessAbstract
The self-cleaning function of superhydrophobic surfaces is conventionally attributed to the removal of contaminating particles by impacting or rolling water droplets, which implies the action of external forces such as gravity. Here, we demonstrate a unique self-cleaning mechanism whereby the contaminated superhydrophobic surface is exposed to condensing water vapor, and the contaminants are autonomously removed by the self-propelled jumping motion of the resulting liquid condensate, which partially covers or fully encloses the contaminating particles. The jumping motion off the superhydrophobic surface is powered by the surface energy released upon coalescence of the condensed water phase around the contaminants. The jumping-condensate mechanism is shown to spontaneously clean superhydrophobic cicada wings, where the contaminating particles cannot be removed by gravity, wing vibration, or wind flow. Our findings offer insights for the development of self-cleaning materials.
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Citations
Cited by
Recent advances in the potential applications of bioinspired superhydrophobic materials
Darmanin, T., & Guittard, F. (2014) · J. Mater. Chem. A · doi:10.1039/c4ta02071e · Cited by 555
Zhang, S., Huang, J., Cheng, Y., Yang, H., Chen, Z., & Lai, Y. (2017) · Small · doi:10.1002/smll.201701867 · Cited by 328
Three-Dimensional Superhydrophobic Nanowire Networks for Enhancing Condensation Heat Transfer
Wen, R., Xu, S., Ma, X., Lee, Y.-C., & Yang, R. (2018) · Joule · doi:10.1016/j.joule.2017.11.010 · Cited by 282
Atmosphere-Mediated Superhydrophobicity of Rationally Designed Micro/Nanostructured Surfaces
Yan, X., Huang, Z., Sett, S., Oh, J., Cha, H., Li, L., Feng, L., Wu, Y., Zhao, C., Orejon, D., et al. (2019) · ACS Nano · doi:10.1021/acsnano.8b09106 · Cited by 266
Droplet Jumping: Effects of Droplet Size, Surface Structure, Pinning, and Liquid Properties
Yan, X., Zhang, L., Sett, S., Feng, L., Zhao, C., Huang, Z., Vahabi, H., Kota, A. K., Chen, F., & Miljkovic, N. (2019) · ACS Nano · doi:10.1021/acsnano.8b06677 · Cited by 193
Metadata
- Authors
- Wisdom, K. M., Watson, J. A., Qu, X., Liu, F., Watson, G. S., & Chen, C.-H.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2013-04-29
- Volume
- 110
- Issue
- 20
- Pages
- 7992-7997
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W1986235698
- Cited by
- 631
- References
- 0
- FWCI
- 14.46
- Type
- journal article
- Language
- en
- Open access
- green
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- Wisdom, K. M., Watson, J. A., Qu, X., Liu, F., Watson, G. S., & Chen, C.-H. (2013). Self-cleaning of superhydrophobic surfaces by self-propelled jumping condensate. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1210770110
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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