INSTABILITY AND PEARLING STATES PRODUCED IN TUBULAR MEMBRANES BY COMPETITION OF CURVATURE AND TENSION
INSTABILITY AND PEARLING STATES PRODUCED IN TUBULAR MEMBRANES BY COMPETITION OF CURVATURE AND TENSION
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DOI：
10.1103/physrevlett.73.1392
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发表时间：
1994-09-05
影响因子：
8.6
通讯作者：
MOSES, E
中科院分区：
文献类型：
--
作者：
BARZIV, R;MOSES, E
我们研究了管状流体膜的稳定性与光镊扰动他们。蠕动的不稳定性出现，与管圆周的顺序上的波长，其特征在于在膜中的曲率波动的绷紧和抑制。我们解释这方面的一个模型，其中包括一个表面张力项的弹性能量，并描述了一个过渡到稳定的，有限振幅蠕动状态。在高振幅下，实验揭示了“珍珠"通过它们行进和聚集的细管沿着相互连接的新的动态状态。
We investigate the stability of tubular fluid membranes by perturbing them with optical tweezers. A peristaltic instability appears, with wavelength on the order of the tube circumference, characterized by tautness and suppression of curvature fluctuations in the membrane. We interpret this in terms of a model that includes a surface tension term in the elastic energy, and describes a transition to stable, finite amplitude peristaltic states. At high amplitudes the experiment reveals new dynamic states of ''pearls'' interconnected via thin tubes along which they travel and aggregate.