可溶性纤维上的宝塔不稳定性（PI）
The pagoda instability (PI) on soluble fibers
摘要：
本文提出了一种新的不稳定性时，插入到液体中的可溶性纤维。在液体润湿和溶解纤维后，移动接触线（MCL）自发地失去稳定性。由于纤维的形状看起来像一个中国宝塔，我们将这种不稳定性称为宝塔不稳定性（PI）。溶解和润湿的耦合导致其他特殊的现象，即溶解诱导射流，并优化纤维的形状等。我们提出了PI的判据，并显示界面能和化学势之间的竞争推导MCL运动和PI。相图用于总结纤维的最终形状。通过原子力显微镜（AFM）测量，发现优化后的纤维具有低附着力的特点。在潮湿环境下，使用优化后的光纤可使AFM测量中毛细管力的影响降低70%。
英文摘要：
This paper presents a new kind of instability when inserting a soluble fiber into liquid. After wetting and dissolving the fiber by the liquid, the moving contact line (MCL) spontaneously loses stability. Because the sculpted shape from fiber looks like a Chinese pagoda, we name this instability as pagoda instability (PI). Coupling of dissolution and wetting leads to other special phenomena, i.e. dissolving-induced jet flow, and optimizes the fiber shape, etc. We propose a criterion of PI and show the competition between interface energy and chemical potential deduce the MCL motion and PI. A phase diagram is used to summary the final shapes of fibers. By conducting atomic force microscope (AFM) measurement, we find the fiber with optimized-shape has the characteristics of low adhesion force. Using the optimized-fiber can decrease the 70% influence of capillary force for AFM measurement in humid environment.
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