Existence of a hexatic phase in porous media.
Existence of a hexatic phase in porous media.
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多孔介质中存在六方相。
DOI：
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发表时间：
2002
影响因子：
8.6
通讯作者：
M. Śliwińska
中科院分区：
文献类型：
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作者：
R. Radhakrishnan;K. Gubbins;M. Śliwińska
简单流体在窄缝状碳孔中的分子模拟表现出晶体-六态和六态-液体转变，与kosterlitz - thoulless - halperin - nelson - young理论一致。在约束条件下，六相稳定的温度范围显著扩大。值得注意的是，对于单个吸附层来说是连续的转变，当孔隙可以容纳两个分子层时，转变就变成了弱一级。活性炭纤维（孔径为1.4 nm）中CCl4和苯胺的非线性介电效应测量表明，在这些转变处存在发散，证实了六相的存在。
Molecular simulations for simple fluids in narrow slit-shaped carbon pores exhibit crystal-hexatic and hexatic-liquid transitions that are consistent with Kosterlitz-Thouless-Halperin-Nelson-Young theory. The temperature range over which the hexatic phase is stable is dramatically widened under confinement. Remarkably, the transitions, which are continuous for a single adsorbed layer, become weakly first order when the pore can accommodate two molecular layers. Nonlinear dielectric effect measurements for CCl4 and aniline in activated carbon fibers (pore width 1.4 nm) show divergence at these transitions, confirming the hexatic phase.