Nanotextured Shrink Wrap Superhydrophobic Surfaces by Argon Plasma Etching.
Nanotextured Shrink Wrap Superhydrophobic Surfaces by Argon Plasma Etching.
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DOI：
10.3390/ma9030196
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发表时间：
2016-03-14
期刊：
影响因子：
--
通讯作者：
Khine M
中科院分区：
文献类型：
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作者：
Nokes JM;Sharma H;Tu R;Kim MY;Chu M;Siddiqui A;Khine M
我们提出了一种快速、简单、可扩展的方法，利用氩（Ar）等离子体直接在商品收缩薄膜中获得超疏水（SH）衬底。氩等离子体处理在收缩膜表面产生一层坚硬的皮肤层。当薄膜收缩时，硬皮层与大块收缩膜之间的刚度不匹配导致形成具有纳米纹理特征的多尺度分层皱纹。扫描电镜（SEM）图像证实了这些仿生结构的存在。接触角（CA）和接触角滞后（CAH）测量分别定义为大于150°和小于10°的值，验证了衬底的SH性质。此外，我们证明了将亲水区域可靠地绘制到SH底物上的能力，从而可以精确捕获和检测尿液中的蛋白质。最后，我们通过在SH Ar底物上绘制对比的超亲水性微通道来诱导生物传感的流动，从而实现了自驱动的微流体。
We present a rapid, simple, and scalable approach to achieve superhydrophobic (SH) substrates directly in commodity shrink wrap film utilizing Argon (Ar) plasma. Ar plasma treatment creates a stiff skin layer on the surface of the shrink film. When the film shrinks, the mismatch in stiffness between the stiff skin layer and bulk shrink film causes the formation of multiscale hierarchical wrinkles with nano-textured features. Scanning electron microscopy (SEM) images confirm the presence of these biomimetic structures. Contact angle (CA) and contact angle hysteresis (CAH) measurements, respectively, defined as values greater than 150° and less than 10°, verified the SH nature of the substrates. Furthermore, we demonstrate the ability to reliably pattern hydrophilic regions onto the SH substrates, allowing precise capture and detection of proteins in urine. Finally, we achieved self-driven microfluidics via patterning contrasting superhydrophilic microchannels on the SH Ar substrates to induce flow for biosensing.