arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1704.06207cond-mat.softcond-mat.stat-mech
收藏

自推进Janus示踪剂在聚合物环境中的扩散

Diffusion of self-propelled Janus tracer in polymeric environment

Nairhita Samanta, Rohit Goswami, Rajarshi Chakrabarti

摘要:

化学合成的Janus颗粒由于其在外界刺激下的自推进能力,具有作为体内药物释放剂的巨大前景。在这里,我们报告了有史以来第一次计算研究的平移和旋转运动的自推进Janus示踪剂在heterogeneous聚合物环境。聚合物的存在使得Janus示踪剂的平移均方位移(MSD)与游离Janus示踪剂的平移均方位移相比增长非常缓慢,但令人惊讶的是,如在最近的实验中观察到的,均方角位移(MSAD)显著增加。此外,随着推进速度的增加,MSAD增长得更快。而当排斥性聚合物被具有粘性区域的聚合物所取代时,MSD和MSAD均显示出急剧下降。

英文摘要:

Artificially synthesized Janus particles have tremendous prospective as in-vivo drug-delivery agents due to the possibility of self-propulsion by external stimuli. Here we report the first ever computational study of translational and rotational motion of self-propelled Janus tracers in a het- erogeneous polymeric environment. The presence of polymers makes the translational mean square displacement (MSD) of the Janus tracer to grow very slowly as compared to that of a free Janus tracer, but surprisingly the mean square angular displacement (MSAD) is significantly increased as observed in a recent experiment. Moreover, with the increasing propulsion velocity, MSAD grows even faster. However, when the repulsive polymers are replaced with polymers with sticky zones, MSD and MSAD both show sharp decline.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑