Xu Lin, Bandyopadhyay Dipankar, Reddy Puchalapalli Dinesh Sankar, Sharma Ashutosh, Joo Sang Woo
Laboratory of Surface Physics and Chemistry, Guizhou Education University, Guiyang, 550018, P. R. China.
Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India.
Sci Rep. 2017 Nov 7;7(1):14776. doi: 10.1038/s41598-017-14861-4.
A 'giant' slip dynamics was engineered to a highly confined interface of a dewetting polymethylmethacrylate (PMMA) ultrathin film by introducing a lubricating viscous polystyrene (PS) sublayer. The crossover of regimes from no-slip to giant-slip was engendered by tuning the viscosity and thickness of the sublayer. A long-range hole-rim interaction with increase in slippage on the PMMA-PS interface transformed the circular holes on the PMMA surface into the noncircular faceted ones. The extent of the slippage and the transition of the length scales from slip-dominated to no-slip regime were evaluated using a general linear stability analysis. The proposed formulation provided an analytical tool to evaluate the slippage effective at the soft and deformable liquid-liquid interfaces.
通过引入润滑性粘性聚苯乙烯（PS）子层，在去湿聚甲基丙烯酸甲酯（PMMA）超薄膜的高度受限界面上设计了一种“巨大”的滑移动力学。通过调节子层的粘度和厚度，实现了从无滑移到巨大滑移状态的转变。PMMA-PS界面上随着滑移增加的长程孔边缘相互作用将PMMA表面的圆形孔转变为非圆形多面孔。使用一般线性稳定性分析评估了滑移程度以及从滑移主导到无滑移状态的长度尺度转变。所提出的公式提供了一种分析工具，用于评估在柔软且可变形的液-液界面处有效的滑移。
