We report fabrication of a novel sticky parahydrophobic cerium oxide (CeO₂) coating using a facile and industrially viable plasma spray technique, which has prospective applications in microfluidic chips, no loss microdroplet transportation and chemical microreactors. Our coating displays significantly high water contact angle (∼159.02˚) along with high contact angle hysteresis (CAH≥90˚), very much similar to a ‘Rose petal’. This is further strengthened by the fact that the coating displayed remarkable adhesion even with large inverted water droplets of 70 μL, which is significantly higher than the reported values of 18 μL for polymer and 20 μL for drop casted CeO₂ nanotubes. We also present systematic characterization results to clarify the ongoing confusion regarding the hydrophobicity of CeO₂ coatings often reported in literature. Meanwhile, our parahydrophobic coating also showed remarkable thermal and mechanical stability even at a significantly high temperature of 200 °C for 14 h and with 50 g abrasive paper.

我们报告了一种新型的粘性超疏水氧化铈（CeO ₂）涂层的制造，该涂层使用了一种简便且工业上可行的等离子喷涂技术，该技术在微流控芯片，无损失微滴运输和化学微反应器中具有前瞻性应用。我们的涂料具有很高的水接触角（〜159.02˚）和高的接触角滞后（CAH≥90˚），与“玫瑰花瓣”非常相似。涂层甚至在倒置的大水滴为70μL时仍显示出显着的附着力，这一事实进一步加强了这一点，这大大高于所报道的聚合物的18μL和浇铸的CeO _2的20μL的报告值。纳米管。我们还提出了系统的表征结果，以阐明有关文献中经常报道的CeO ₂涂层疏水性的持续困惑。同时，即使在200°C的高温下使用50 g砂纸持续14 h，我们的超疏水涂层也表现出出色的热稳定性和机械稳定性。