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The Effect of Topographic Defects on the Superhydrophobic Properties of Coatings Based on ZnO

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Abstract

The results of a study of the hydrophobic properties of a ZnO coating with different morphologies of the surface are presented. It is shown that the Wenzel state is implemented for the case of samples of ZnO with nanoscale surface roughness, while the Cassie state is implemented for microstructured samples. A superhydrophobic state with a contact angle of 151° and work of adhesion of 8.82 mJ/m2 is achieved for a sample with multimodal surface roughness. It is demonstrated that the presence of microscale defects on the surface of the superhydrophobic samples leads to the instability of the Cassie state, while the Cassie–Wenzel transition is fulfilled in the case of increasing the radius of water drops.

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ACKNOWLEDGMENTS

This study was performed with the use of the equipment of the Center for Collective Use of the Federal Scientific Research Center “Crystallography and Photonics”. The authors are grateful to L.A. Zadorozhnaya and A.M. Opolchentsev for help in conducting the studies.

Funding

This study was performed in the frameworks of state orders to the Federal Scientific Research Center “Crystallography and Photonics”, Russian Academy of Sciences, and Dagestan Federal Research Center, Russian Academy of Sciences, as well as was supported by the Russian Foundation for Basic Research, grant no. 20-08-00598.

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Authors and Affiliations

  1. Federal Scientific Research Center “Crystallography and Photonics,” Russian Academy of Sciences, 119333, Moscow, Russia

    A. E. Muslimov, A. Sh. Asvarov & V. M. Kanevsky

  2. Amirkhanov Institute of Physics, Dagestan Federal Research Center, Russian Academy of Sciences, 367003, Makhachkala, Dagestan, Russia

    A. Sh. Asvarov

  3. Analytical Center for Collective Use, Dagestan Federal Research Center, Russian Academy of Sciences, 367001, Makhachkala, Dagestan, Russia

    N. S. Shabanov

Authors
  1. A. E. Muslimov
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  2. A. Sh. Asvarov
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  3. N. S. Shabanov
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  4. V. M. Kanevsky
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Corresponding author

Correspondence to A. E. Muslimov.

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The authors declare that they have no conflict of interest.

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Translated by E. Boltukhina

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Muslimov, A.E., Asvarov, A.S., Shabanov, N.S. et al. The Effect of Topographic Defects on the Superhydrophobic Properties of Coatings Based on ZnO. Tech. Phys. Lett. 46, 954–957 (2020). https://doi.org/10.1134/S1063785020100107

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