Naslov
Fabrication of cerium oxide films with thickness and hydrophobicity gradients

Autori
Zhu, Dapeng ; Hu, Chenglong ; Zhao, Rongzhi ; Tan, Xiangyang ; Li, Yixing ; Mandić, Vilko ; Shi, Zhen ; Zhang, Xuefeng

Izvornik
Surface & coatings technology (0257-8972) 430 (2022); 127985, 8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
cerium oxide ; thin-films ; magnetron sputtering

Sažetak
Versatile surfaces with hydrophobicity gradients have attracted intensive attention because of their tunable wettability. Here, cerium oxide films are prepared on tilted substrates by magnetron sputtering, the induced thickness gradient strongly influences the structural, morphological, and wetting properties. It is found that the surface hydrophobicity is positively proportional to the root-mean-square (RMS) roughness and thickness variations, larger thickness gradient brings more obvious gradient hydrophobic surfaces. The results show that the RMS roughness gradient increases from 0 nm/cm, 0.08 nm/cm to 0.16 nm/cm, and the thickness gradient increases from 0 nm/cm, 12.0 nm/cm to 13.2 nm/cm, with the tilt angle changing from 0◦, 30◦ to 60◦, respectively. Correspondingly, the hydrophobicity gradient increases from 0◦/cm, 1.6◦/cm to 2.7◦/cm, respectively. Our study offers practicable method a method for developing hydrophobicity gradient surfaces, which can be used for droplet movement applications.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija, Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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