论文标题
平行微型根系上自属胶体的活动辅助屏障横断
Activity-assisted barrier-crossing of self-propelled colloids over parallel microgrooves
论文作者
论文摘要
我们报告了一项对一维周期势景观的自螺旋颗粒（SPP）动力学的系统研究，该景观是在微瘤图案的聚二甲基硅氧烷（PDMS）底物上捏造的。从SPPS的测得的非平衡概率密度函数中，我们发现一旦在固定角度近似下将自popullopulsion力包括在电势中，就可以通过有效的电位来描述慢慢旋转SPP的逃生动力学。这项工作表明，平行的微型根系为对自我推广力之间的相互作用，潜在景观和热噪声的空间限制及其对SPPS的活动辅助逃生动力学和SPP的影响的影响提供了一种多功能平台。
We report a systematic study of the dynamics of self-propelled particles (SPPs) over a one-dimensional periodic potential landscape, which is fabricated on a microgroove-patterned polydimethylsiloxane (PDMS) substrate. From the measured non-equilibrium probability density function of the SPPs, we find that the escape dynamics of the slow-rotating SPPs across the potential landscape can be described by an effective potential, once the self-propulsion force is included into the potential under the fixed angle approximation. This work demonstrates that the parallel microgrooves provide a versatile platform for a quantitative understanding of the interplay among the self-propulsion force, spatial confinement by the potential landscape, and thermal noise, as well as its effects on activity-assisted escape dynamics and transport of the SPPs.
