Journal
ACS NANO
Volume 6, Issue 9, Pages 7656-7664Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn3032547
Keywords
superhydrophobicity; water bouncing; hierarchical nanostructures; thermodynamical analysis; droplet deformation
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2010-0006337]
- Korea Science and Engineering Foundation (KOSEF)
- Korean government (MEST) through Intelligent Textile System Research Center (ITRC) [R11-2005-065]
- National Research Foundation of Korea [2010-0006337] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Superhydrophobicity of multiscale hierarchical structures and bouncing phenomenon of a water droplet on the superhydrophobic surface were studied. The multiscale hierarchical structures of carbon nanotube/ZnO and ZnO/carbon nanofiber were produced by the hydrothermal method. The multiscale hierarchical structure showed superhydrophobicity with a static contact angle (CA) larger than 160 degrees due to increased air pockets in the Cassie-Baxter state. The water bouncing effect observed on the multiscale hierarchical nanostructure was explained by the free energy barrier (FEB) analysis and finite element simulation. The multiscale hierarchical nanostructure showed low FEBs which provoke high CA and bouncing phenomenon due to small energy dissipation toward receding and advancing directions.
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