Superhydrophobic surfaces (i.e., surfaces extremely repellent to water) allow water droplets to bead up and easily roll off from the surface. While a few methods have been developed to fabricate metallic superhydrophobic surfaces, these methods typically involve expensive equipment, environmental hazards, or multi-step processes. In this work, we developed a universal, scalable, solvent-free, one-step methodology based on thermal sensitization to create appropriate surface texture and fabricate metallic superhydrophobic surfaces. To demonstrate the feasibility of our methodology and elucidate the underlying mechanism, we fabricated superhydrophobic surfaces using ferritic (430) and austenitic (316) stainless steels (representative alloys) with roll off angles as low as 4° and 7°, respectively. We envision that our approach will enable the fabrication of superhydrophobic metal alloys for a wide range of civilian and military applications.
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19 June 2017
Research Article|
June 21 2017
Metallic superhydrophobic surfaces via thermal sensitization
Hamed Vahabi;
Hamed Vahabi
a)
1
Department of Mechanical Engineering, Colorado State University
, Fort Collins, Colorado 80523, USA
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Wei Wang;
Wei Wang
a)
1
Department of Mechanical Engineering, Colorado State University
, Fort Collins, Colorado 80523, USA
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Ketul C. Popat;
Ketul C. Popat
1
Department of Mechanical Engineering, Colorado State University
, Fort Collins, Colorado 80523, USA
2
School of Biomedical Engineering, Colorado State University
, Fort Collins, Colorado 80523, USA
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Gibum Kwon;
Gibum Kwon
3
Department of Mechanical Engineering, University of Kansas
, Lawrence, Kansas 66045, USA
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Troy B. Holland;
Troy B. Holland
1
Department of Mechanical Engineering, Colorado State University
, Fort Collins, Colorado 80523, USA
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Arun K. Kota
Arun K. Kota
b)
1
Department of Mechanical Engineering, Colorado State University
, Fort Collins, Colorado 80523, USA
2
School of Biomedical Engineering, Colorado State University
, Fort Collins, Colorado 80523, USA
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a)
H. Vahabi and W. Wang contributed equally to this work.
b)
Author to whom correspondence should be addressed: arun.kota@colostate.edu
Appl. Phys. Lett. 110, 251602 (2017)
Article history
Received:
March 31 2017
Accepted:
June 04 2017
Citation
Hamed Vahabi, Wei Wang, Ketul C. Popat, Gibum Kwon, Troy B. Holland, Arun K. Kota; Metallic superhydrophobic surfaces via thermal sensitization. Appl. Phys. Lett. 19 June 2017; 110 (25): 251602. https://doi.org/10.1063/1.4989577
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