Liquid-crystal-mediated force between a cylindrical nanoparticle and substrate.
Liquid-crystal-mediated force between a cylindrical nanoparticle and substrate.
复制标题
圆柱形纳米粒子和基底之间的液晶介导力。
DOI：
10.1103/physreve.76.041706
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
M. P. Allen
中科院分区：
文献类型：
--
作者：
D. Cheung;M. P. Allen
利用经典密度泛函理论，研究了固体基底附近圆柱形纳米颗粒周围的分子流体结构。在溶剂的向列相和各向同性相中，计算了纳米颗粒和衬底之间的溶剂介导力。在向列相，力是短距离的，是由于衬底附近高密度区域和纳米颗粒之间的相互作用而产生的。在各向同性阶段，衬底和纳米颗粒之间形成向列桥，使它们之间产生吸引力。将数值计算的纳米粒子与衬底之间的电势作为分离的函数与Derjaguin近似计算的电势进行了比较。在各向同性相中，这些发现在低分离时具有合理的一致性，而在向列相中一致性较差。
Using classical density functional theory, the structure of a molecular fluid around a cylindrical nanoparticle near a solid substrate is studied. The solvent-mediated force between the nanoparticle and the substrate is calculated in both the nematic and isotropic phases of the solvent. In the nematic phase, the force is short ranged and arises due to interaction between high-density regions near the substrate and nanoparticle. In the isotropic phase, the formation of a nematic bridge between the substrate and nanoparticle gives rise to an attractive force between them. The potential between the nanoparticle and substrate as a function of separation calculated numerically is compared to that calculated from the Derjaguin approximation. In the isotropic phase these are found to be in reasonable agreement at low separations, while the agreement is poorer in the nematic phase.