发表机构
Institute of Physics, Johannes Gutenberg University Mainz; Instituto de Física del Sur (IFISUR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Sur（美因茨约翰内斯·古腾堡大学物理研究所; 南方物理研究所（IFISUR），阿根廷国家科学研究委员会（CONICET），南方国立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究用混合粒子/金兹堡-朗道模型，探究胶体颗粒尺寸与表面图案化对层状嵌段共聚物中位错对形成能的调控规律，为控制其拓扑缺陷稳定性提供了定量指导。
AI 中文摘要
我们研究胶体夹杂物如何改变层状嵌段共聚物体系中位错对的形成能。采用混合粒子/金兹堡-朗道模型，通过对比有无嵌入胶体时无缺陷态和含缺陷态的能量，计算缺陷形成能，并用有限尺寸标度获取热力学极限下的形成能。胶体插入的影响高度依赖于颗粒尺寸和表面图案化：均质颗粒随尺寸增大，对位错对的稳定作用增强；尺寸大于一个层状畴的颗粒优先占据位错芯，在此处它们替换受拉伸的聚合物，而非使无缺陷层状结构变形，稳定作用的大小取决于表面亲和性；而平衡型Janus颗粒则会提高形成能，因为其相互竞争的表面偏好无法在弯曲的位错芯附近同时得到满足，改变其表面区域比例可在上述两种极限之间过渡。对于尺寸小于一个层状畴的颗粒，表面图案化的影响很小；但对于较大颗粒，其可使形成能改变几十倍kBT。这些结果为调控层状嵌段共聚物体系中的拓扑缺陷稳定性提供了定量指导。
英文摘要
We study how colloidal inclusions modify the formation energy of dislocation pairs in lamellar block copolymer systems. Using a hybrid particle/Ginzburg--Landau model, we calculate defect formation energies by comparing defect-free and defect-containing states with and without embedded colloids. Finite-size scaling is used to obtain formation energies in the thermodynamic limit. The effect of colloid insertion depends strongly on particle sizes and surface patterning. Homogeneous particles increasingly stabilize dislocation pairs with increasing particle sizes. Particles larger than one lamellar domain preferentially occupy the dislocation cores, where they replace strained polymer rather than deforming defect-free lamellae. The magnitude of this stabilization depends on surface affinity. Balanced Janus particles instead increase the formation energy, because their competing surface preferences cannot be satisfied simultaneously near the curved core. Varying the patch ratio interpolates between these limits. Surface patterning has little effect for particles smaller than one lamellar domain but changes the formation energy by several tens of $k_BT$ for larger particles. These results provide quantitative guidelines for controlling topological defect stability in lamellar block copolymer systems.
