层状化合物负压缩性机理的研究
On the mechanism of negative compressibility in layered compounds
摘要：
在一个简单的模型内讨论了在压力传递流体介质存在下，层状化合物在压缩过程中出现负压缩性的机理。它考虑了排除体积效应和软流体矩阵排斥。结果表明，层间距随外加压力的非单调变化是由于外加压力与吸附流体引起的内部压力之间存在竞争。最近的实验数据的氧化石墨的“结构呼吸”在水的存在下，根据这些理论结果进行了分析。
英文摘要：
A mechanism of negative compressibility occurring in compressed layered compounds in the presence of a pressure transmitting fluid medium is discussed within a simple model. It takes into account the excluded volume effects and soft fluid-matrix repulsion. It is demonstrated that a non-monotonic behavior of the interlayer spacing with the applied pressure results from a competition between the applied pressure and the internal one induced by the adsorbed fluid. Recent experimental data on the graphite oxide "structure breathing" under compression in the presence of water are analyzed in the light of these theoretical results.
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