Fabrication of cerium oxide films with thickness and hydrophobicity gradients

Fabrication of cerium oxide films with thickness and hydrophobicity gradients
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具有厚度和疏水性梯度的氧化铈薄膜的制备

DOI:
10.1016/j.surfcoat.2021.127985
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发表时间:
2022-01
影响因子:
5.4
通讯作者:
Xuefeng Zhang
Xuefeng Zhang
中科院分区:
材料科学1区
文献类型:
--
作者:
Dapeng Zhu;Chenglong Hu;Rongzhi Zhao;Xiangyang Tan;Yixing Li;Vilko M;ić;Zhen Shi;Xuefeng Zhang

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具有疏水性梯度的多功能表面因其可调的润湿性而引起了人们的广泛关注。本文采用磁控溅射方法在倾斜衬底上制备了CeO_2薄膜,诱导厚度梯度对薄膜的结构、形貌和润湿性能有很大的影响。研究发现,表面疏水性与均方根粗糙度和厚度变化成正比,厚度梯度越大,疏水表面的梯度越明显。结果表明,当倾角从0°、30°变化到60°时,均方根粗糙度梯度分别从0、0.08 nm/cm增加到0.16 nm/cm,厚度梯度从0、12.0 nm/cm增加到13.2 nm/cm。相应地,疏水梯度分别从0°/cm、1.6°/cm增加到2.7°/cm。我们的研究为开发疏水性梯度表面提供了一种可行的方法,可用于液滴运动应用。
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.
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