评L. M.“可展带的统计力学”。Giomi和L. Mahadevan
Comment on 'Statistical mechanics of developable ribbons' by L. Giomi and L. Mahadevan
摘要：
Giomi和Mahadevan [Phys. Rev. Lett. 104，238104（2010）]研究了弹性带的统计力学，并声称即使在不存在固有曲率（或者用作者的话来说，“优先的零温度扭曲”）的情况下也为带状聚合物的“潜在螺旋结构”提供了证据。他们发现一个持久的长度是三倍以上的蠕虫状链具有相同的弯曲刚度。我们表明，这些结果是一个人工制品的作者的有缺陷的配方，它产生了螺旋偏置，并没有支持所描述的效果可以声称。
英文摘要：
Giomi and Mahadevan [Phys. Rev. Lett. 104, 238104 (2010)] study the statistical mechanics of elastic ribbons and claim to provide evidence for "an underlying helical structure" of ribbon-like polymers even in the absence of intrinsic curvature (or, in the authors' words, "of a preferential zero-temperature twist"). They find a persistence length that is over three times that of a wormlike chain having the same bending rigidity. We show that these results are an artefact of the authors' flawed formulation, which produces a helical bias, and that no support for the described effect can be claimed.
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