Seyednejad Seyed Reza, Shoarinejad Saeedeh, Mozaffari Mohammad Reza, Joneghani Faezeh Amini
Institute for Advanced Studies in Basic Sciences, Zanjan 45195-159, Iran.
Department of Theoretical and Nano Physics, Faculty of Physics, Alzahra University, Tehran, Iran.
Phys Rev E. 2023 Jun;107(6-1):064703. doi: 10.1103/PhysRevE.107.064703.
The present study investigates the arrangement of hollow pyramidal cone shells and their interactions with degenerate planar anchoring on the inner and outer surfaces of particles within the nematic host. The shell thickness is in order of the nematic coherence length. The numerical behavior of colloids is determined by minimizing the Landau-de Gennes free energy in the presence of the Fournier surface energy and using the finite element method. Colloidal pyramidal cones can orient parallel and perpendicular with the far director orientation. In the parallel alignment, we found the splay director distortion into the pyramid with two boojum defects at the inner and outer tips. The director shows bending distortion without defect patterns when the pyramid is aligned perpendicularly. They induce long-range dipolar interaction and can form nested structures in close contact.
本研究调查了中空金字塔锥形壳的排列及其与向列型主体内颗粒内外表面上简并平面锚定的相互作用。壳厚度为向列型相干长度量级。通过在存在富尼埃表面能的情况下最小化朗道 - 德热纳自由能并使用有限元方法来确定胶体的数值行为。胶体金字塔锥可以与远场指向矢方向平行和垂直排列。在平行排列中，我们发现展曲指向矢畸变进入金字塔，在内、外尖端处有两个布儒姆缺陷。当金字塔垂直排列时，指向矢显示出无缺陷图案的弯曲畸变。它们会引发长程偶极相互作用，并能形成紧密接触的嵌套结构。
