Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 10, Pages 7009-7013Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am5015343
Keywords
superhydrophobicity; Lotus effect; bubbles; buoyancy; air sacs
Funding
- NSF CAREER Award [DMR-1055594]
- Penn MRSEC [NSF-1120901]
- BK21 Plus - Ministry of Education, Korea [10Z20130011057]
- Obra Social La Caixa
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1055594] Funding Source: National Science Foundation
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We develop highly buoyant superhydrophobic films that mimic the three-dimensional structure of lotus leaves. The high buoyancy of these structure stems from mechanically robust bubbles that significantly reduce the density of the superhydrophobic films. These highly buoyant superhydrophobic films stay afloat on water surface while carrying a load that is more than 200 times their own weight. In addition to imparting high buoyancy, the incorporation of robust hydrophilic bubbles enables the formation of free-standing structures that mimic the water-collection properties of Namib Desert beetle. We believe the incorporation of robust bubbles is a general method that opens up numerous possibilities in imparting high buoyancy to different structures that needs to stay afloat on water surfaces and can potentially be used for the fabrication of lightweight materials. (Image on the upper left reproduced with permission from Yong, J.; Yang, Q; Chen, F.; Zhang, D.; Du, G.; Si, J.; Yun, F.; Hou, X. A Bioinspired Planar Superhydrophobic Microboat. J. Micromech. Microeng. 2014, 24, 035006. Copyright 2014 IOP Publishing.)
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