物理学报2024，Vol.73Issue(15)：105-110,6.DOI:10.7498/aps.73.20231701
不同力程排斥相互作用胶体粒子系统的摩擦特性
Friction characteristics of colloidal particle systems with repulsive interactions of different force ranges
摘要
Abstract
Friction occurs in various systems from the nanoscale to the geophysical scale and plays a crucial role.The microscopic mechanism of friction and the origin of the dynamic ordering in interacting particle systems are still controversial.Using Langevin simulations,we study the friction of two-dimensional colloids on the substrate with randomly distributed point-like pinning centers.We consider three different model colloidal systems,and in each system the colloidal particles interact with each other through repulsive interactions that have two different force ranges.We find two maximum static friction forces(the first maximum static friction the second maximum static friction fdc2).The interference between short-range repulsive interactions with similar force ranges in model-3 colloidal system can lead the repulsion between particles near pinning centers to significantly increase,resulting in a decrease in fdc1 and an enhanced orderly movement along the direction of external driving forces above fdc2.The results provide guidance for revealing the friction mechanism in the colloidal particles with interactions that have different force ranges.关键词
摩擦/胶体/塑性流动/运动有序Key words
friction/colloids/plastic flow/moving order引用本文复制引用
段浩炀,杨柯欣,曹义刚..不同力程排斥相互作用胶体粒子系统的摩擦特性[J].物理学报,2024,73(15):105-110,6.基金项目
河南省高等学校重点科研项目(批准号:22A140029)、河南省自然科学基金(批准号:222300420552)和河南省研究生教育改革与质量提升工程项目(批准号:YJS2024KC06)资助的课题.Project supported by the Key Scientific Research Projects of Colleges and Universities in Henan Province,China(Grant No.22A140029),the Natural Science Foundation of Henan Province,China(Grant No.222300420552),and the Postgraduate Education Reform and Quality Improvement Project of Henan Province,China(Grant No.YJS2024KC06). （批准号:22A140029）
