Stability of plasma treated superhydrophobic surfaces under different ambient conditions
Stability of plasma treated superhydrophobic surfaces under different ambient conditions
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等离子体处理的超疏水表面在不同环境条件下的稳定性
DOI：
10.1016/j.jcis.2016.02.058
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发表时间：
2016-05-15
影响因子：
9.9
通讯作者：
Liu, Xin
中科院分区：
文献类型：
--
作者：
Chen, Faze;Liu, Jiyu;Liu, Xin
超疏水衬底的等离子体亲水性已成为一个重要的研究领域，例如，超疏水(超)亲水图案化表面在芯片实验室系统、细胞黏附和液体传输控制等方面具有重要的实际应用价值。然而，等离子体诱导的亲水性的稳定性一直被认为是一个关键问题，因为润湿性往往会恢复到未经处理的状态(即老化行为)。本文主要研究了等离子体处理的超疏水表面在不同环境条件(如温度和相对湿度)下的稳定性。采用水接触角测量和X射线光电子能谱对老化过程进行了监测。结果表明，低温和低相对湿度有利于延缓老化过程，低温(-10℃)预储存使处理后的表面不能恢复超疏水性。当在水中老化时，获得了持久的疏水性。由于等离子体诱导的亲水性在一段时间内的稳定性是一个非常重要的问题，这项工作将有助于优化等离子体处理的超疏水表面的存储条件。(C)2016 Elsevier Inc.保留所有权利。
Plasma hydrophilizing of superhydrophobic substrates has become an important area of research, for example, superhydrophobic-(super)hydrophilic patterned surfaces have significant practical applications such as lab-on-chip systems, cell adhesion, and control of liquid transport. However, the stability of plasma-induced hydrophilicity is always considered as a key issue since the wettability tends to revert back to the untreated state (i.e. aging behavior). This paper focuses on the stability of plasma treated superhydrophobic surface under different ambient conditions (e.g. temperature and relative humidity). Water contact angle measurement and X-ray photoelectron spectroscopy are used to monitor the aging process. Results show that low temperature and low relative humidity are favorable to retard the aging process and that pre-storage at low temperature (-10 degrees C) disables the treated surface to recover superhydrophobicity. When the aging is performed in water, a long-lasting hydropholicity is obtained. As the stability of plasma-induced hydrophilcity over a desired period of time is a very important issue, this work will contribute to the optimization of storage conditions of plasma treated superhydrophobic surfaces. (C) 2016 Elsevier Inc. All rights reserved.