Trasca R A, Klapp S H L
Stranski-Lab für Physikalische und Theoretische Chemie, Sekr. C7, Technische Universität Berlin, Strasse des 17. Juni 115, D-10623 Berlin, Germany.
J Chem Phys. 2008 Aug 28;129(8):084702. doi: 10.1063/1.2971182.
We present Monte Carlo simulation results for strongly coupled dipolar fluids, such as ferrofluids, confined to a narrow slit pore accommodating only a few layers of particles. Our results show that the ferromagnetic ordering observed in dense bulk systems and in thick fluid films persists down to nanoscopic wall separations where the system consists of only 3 monolayers. The ferromagnetic transition density in these systems approaches experimentally accessible values. For even smaller wall separations, we observe stripelike defects and finally the breakdown of orientational ordering for systems close to the two-dimensional limit. Our results for the liquid phase are supported by simulations starting from quasicrystalline soft-sphere configurations.
我们展示了强耦合偶极流体（如铁磁流体）的蒙特卡罗模拟结果，这些流体被限制在仅容纳几层粒子的狭窄狭缝孔隙中。我们的结果表明，在致密的块状系统和厚流体膜中观察到的铁磁有序性一直持续到纳米级的壁间距，此时系统仅由3个单分子层组成。这些系统中的铁磁转变密度接近实验可及的值。对于甚至更小的壁间距，我们观察到条纹状缺陷，最终对于接近二维极限的系统，取向有序性被破坏。我们对液相的结果得到了从准晶软球构型开始的模拟的支持。
