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Morphological Analysis of Crease Patterns Formed on Surface-Attached Hydrogel with a Gradient in Thickness

机译:表面附着的水凝胶,厚度梯度变化的折痕形态的形态学分析

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The morphology of crease pattern formed on the surface-attached hydrogel with a gradient in thickness is analyzed. We label the hydrogel surface at the creased state with fluorescent polyelectrolyte, which enables us to visualize surface morphology of creases using the fluorescent microscopy. Various morphological features of crease patterns are analyzed at different thickness of hydrogel, or characteristic spacing of creases λ_(c,max), to examine the self-similarity of crease morphology at different length scales. Some morphological features show no λ_(c,max) dependence, implying the self-similarity, while others show weak kc,max dependence with positive values of the exponent of power law fit for the plots. We infer that such nonself-similarity is originated from the variations in the kinetics of swelling and creasing of hydrogel, the effect of surface tension, or the reduction in the osmotic pressure occurred during the polyelectrolyte labeling step at different λ_(c,max).
机译:分析了在表面附着的水凝胶上形成的折痕图案的厚度梯度,其形态。我们用荧光聚电解质标记折痕状态下的水凝胶表面,这使我们能够使用荧光显微镜观察折痕的表面形态。在不同厚度的水凝胶或折痕的特征间距λ_(c,max)处分析折痕图案的各种形态特征,以检验不同长度尺度上折痕形态的自相似性。一些形态特征没有显示λ_(c,max)依赖性,这意味着自相似性,而其他一些表现出的kc,max依赖性较弱,并且幂律指数的正值适合该图。我们推断,这种非自相似性是由于在不同的λ_(c,max)下在聚电解质标记步骤中发生的水凝胶溶胀和起皱动力学变化,表面张力效应或渗透压降低而引起的。

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