Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studies
Three Australian native Eucalyptus species, i.e., Eucalyptus woodwardii, Eucalyptus pachyphylla and Eucalyptus dolorosa, were investigated, for the first time, with respect to the hydrophobicity of their leaves. It is well established that these leaves exhibit exceptionally high water repellency, in...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-03-01
|
| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S240584401836496X |
| _version_ | 1819267361707917312 |
|---|---|
| author | Hua Guo Zonghan Xie Jeremy Shaw Kingsley Dixon Zhong-Tao Jiang Chun-Yang Yin Xuemei Liu |
| author_facet | Hua Guo Zonghan Xie Jeremy Shaw Kingsley Dixon Zhong-Tao Jiang Chun-Yang Yin Xuemei Liu |
| author_sort | Hua Guo |
| collection | DOAJ |
| description | Three Australian native Eucalyptus species, i.e., Eucalyptus woodwardii, Eucalyptus pachyphylla and Eucalyptus dolorosa, were investigated, for the first time, with respect to the hydrophobicity of their leaves. It is well established that these leaves exhibit exceptionally high water repellency, in addition to an extraordinary ability to retain water, albeit their specific wetting mechanisms are still poorly understood. To identify the critical factors underlying this phenomenon, the surface topography of these leaves was subjected to micro-examination (SEM). Micro- and nanometer scale surface roughness was revealed, resembling that of the quintessential “lotus effect”. Surface free energy analysis was performed on two models based on the surface topographies of the study Eucalyptus species and lotus, in order to study wetting transitions on these specific microscopic surface features. The influence of surface geometrical parameters, such as edge-to-edge distance, base radius and cylindrical height, on surface free energy with different liquid penetration depths was studied with these two models. Larger energy barriers and smaller liquid-solid contact areas were more influential in the calculations for the lotus than for Eucalyptus. The information obtained from these two models may be useful for guiding the design of novel artificial surfaces in the collection and transport of micro-volume liquids. |
| first_indexed | 2024-12-23T21:15:57Z |
| format | Article |
| id | doaj.art-8953d4371b27426dab7627be2b92dd7e |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-23T21:15:57Z |
| publishDate | 2019-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-8953d4371b27426dab7627be2b92dd7e2022-12-21T17:30:55ZengElsevierHeliyon2405-84402019-03-0153e01316Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studiesHua Guo0Zonghan Xie1Jeremy Shaw2Kingsley Dixon3Zhong-Tao Jiang4Chun-Yang Yin5Xuemei Liu6School of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaSchool of Mechanical Engineering, The University of Adelaide, Adelaide, SA 5005, AustraliaCentre for Microscopy, Characterization & Analysis, The University of Western Australia, Crawley, WA 6009, AustraliaSchool of Molecular and Life Sciences, Curtin University, Bentley, WA 6102, AustraliaSchool of Engineering & Information Technology, Murdoch University, Murdoch, WA 6150, AustraliaNewcastle University in Singapore, SIT Building@Ngee Ann Polytechnic, 537 Clementi Road #06-01, Clementi, 599493, SingaporeDepartment of Infrastructure Engineering, The University of Melbourne, Parkville, VIC 3010, Australia; Corresponding author.Three Australian native Eucalyptus species, i.e., Eucalyptus woodwardii, Eucalyptus pachyphylla and Eucalyptus dolorosa, were investigated, for the first time, with respect to the hydrophobicity of their leaves. It is well established that these leaves exhibit exceptionally high water repellency, in addition to an extraordinary ability to retain water, albeit their specific wetting mechanisms are still poorly understood. To identify the critical factors underlying this phenomenon, the surface topography of these leaves was subjected to micro-examination (SEM). Micro- and nanometer scale surface roughness was revealed, resembling that of the quintessential “lotus effect”. Surface free energy analysis was performed on two models based on the surface topographies of the study Eucalyptus species and lotus, in order to study wetting transitions on these specific microscopic surface features. The influence of surface geometrical parameters, such as edge-to-edge distance, base radius and cylindrical height, on surface free energy with different liquid penetration depths was studied with these two models. Larger energy barriers and smaller liquid-solid contact areas were more influential in the calculations for the lotus than for Eucalyptus. The information obtained from these two models may be useful for guiding the design of novel artificial surfaces in the collection and transport of micro-volume liquids.http://www.sciencedirect.com/science/article/pii/S240584401836496XStructural biologyPlant biology |
| spellingShingle | Hua Guo Zonghan Xie Jeremy Shaw Kingsley Dixon Zhong-Tao Jiang Chun-Yang Yin Xuemei Liu Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studies Heliyon Structural biology Plant biology |
| title | Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studies |
| title_full | Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studies |
| title_fullStr | Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studies |
| title_full_unstemmed | Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studies |
| title_short | Elucidating the surface geometric design of hydrophobic Australian Eucalyptus leaves: experimental and modeling studies |
| title_sort | elucidating the surface geometric design of hydrophobic australian eucalyptus leaves experimental and modeling studies |
| topic | Structural biology Plant biology |
| url | http://www.sciencedirect.com/science/article/pii/S240584401836496X |
| work_keys_str_mv | AT huaguo elucidatingthesurfacegeometricdesignofhydrophobicaustralianeucalyptusleavesexperimentalandmodelingstudies AT zonghanxie elucidatingthesurfacegeometricdesignofhydrophobicaustralianeucalyptusleavesexperimentalandmodelingstudies AT jeremyshaw elucidatingthesurfacegeometricdesignofhydrophobicaustralianeucalyptusleavesexperimentalandmodelingstudies AT kingsleydixon elucidatingthesurfacegeometricdesignofhydrophobicaustralianeucalyptusleavesexperimentalandmodelingstudies AT zhongtaojiang elucidatingthesurfacegeometricdesignofhydrophobicaustralianeucalyptusleavesexperimentalandmodelingstudies AT chunyangyin elucidatingthesurfacegeometricdesignofhydrophobicaustralianeucalyptusleavesexperimentalandmodelingstudies AT xuemeiliu elucidatingthesurfacegeometricdesignofhydrophobicaustralianeucalyptusleavesexperimentalandmodelingstudies |