石墨解理能的精确测定
Accurate Measurement of the Cleavage Energy of Graphite
摘要：
石墨的基面解理能（CE）是理解石墨、石墨烯和碳纳米管的许多不寻常性质的关键材料参数。CE等于表面能的2倍，与石墨的层间结合能和剥离能密切相关。尽管如此，这些属性的价值范围很广，尚未就其大小达成共识。在这里，我们报告的第一个直接的，准确的实验测量的CE石墨使用一种新的方法的基础上，最近发现的自收缩现象的石墨。双晶石墨无公度状态的测量值为0.37 +/- 0.01 J/m2，几乎不随温度（从22°C到198°C）和双晶扭曲角而变化，并且对杂质（来自大气）不敏感。基于测量的CE和理论计算的组合，计算出理想ABAB石墨堆叠的裂解能0.39 +/-0.02J/m2。这些实验测量是理想的，用于评估竞争的理论方法的有效性。
英文摘要：
The basal plane cleavage energy (CE) of graphite is a key material parameter for understanding many of the unusual properties of graphite, graphene, and carbon nanotubes. The CE is equal to twice the surface energy and is closely related to the interlayer binding energy and exfoliation energy of graphite. Nonetheless, a wide range of values for these properties have been reported and no consensus has yet emerged as to their magnitude. Here, we report the first direct, accurate experimental measurement of the CE of graphite using a novel method based on the recently discovered self-retraction phenomenon in graphite. The measured value, 0.37 +/- 0.01 J/m2 for the incommensurate state of bicrystal graphite, is nearly invariant with respect to temperature (from 22°C to 198°C) and bicrystal twist angle, and insensitive to impurities (from the atmosphere). The cleavage energy for the ideal ABAB graphite stacking, 0.39 +/- 0.02 J/m2, is calculated based upon a combination of the measured CE and a theoretical calculation. These experimental measurements are ideal for use in evaluating the efficacy of competing theoretical approaches.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
