https://scholars.lib.ntu.edu.tw/handle/123456789/598293
Title: | Preferred penetration of active nano-rods into narrow channels and their clustering | Authors: | Wang Z Chu K.-C Tsao H.-K Sheng Y.-J. YU-JANE SHENG |
Keywords: | Entropy;Dissipative particle dynamics;Entropic barrier;Entropic effects;Nanoscale channels;Narrow channel;Out of equilibrium;Partition behaviors;Quasi-two-dimensional system;Nanorods | Issue Date: | 2021 | Journal Volume: | 23 | Journal Issue: | 30 | Start page/Pages: | 16234-16241 | Source: | Physical Chemistry Chemical Physics | Abstract: | In a channel connected to a reservoir, passive particles prefer staying in the reservoir than the channel due to the entropic effect, as the size of the particles is comparable to that of the channel. Self-propelled rods can exhibit out-of-equilibrium phenomena, and their partition behavior may differ from that of passive rods due to their persistent swimming ability. In this work, the distribution of active nano-rods between the nanoscale channel and reservoir is explored using dissipative particle dynamics. The ratio of the nano-rod concentration in the slit to that in the reservoir, defined as the partition ratioΨ, is a function of active force, channel width, and rod length. Although passive nano-rods prefer staying in bulk (Ψ< 1), active rods can overcome the entropic barrier and show favorable partition toward narrow channels (Ψ> 1). As the slit width decreases to about the rod's width, active rods entering the slit behave like a quasi-two-dimensional system dynamically. At sufficiently high concentrations and Peclet numbers, nano-rods tend to align and move together in the same direction for a certain time. The distribution (PM) of the cluster size (M) follows a power law,PM?M?2, for small clusters. ? the Owner Societies 2021. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85112470355&doi=10.1039%2fd1cp01065d&partnerID=40&md5=b32958fe145f307a21ec54302264650a https://scholars.lib.ntu.edu.tw/handle/123456789/598293 |
ISSN: | 14639076 | DOI: | 10.1039/d1cp01065d |
Appears in Collections: | 化學工程學系 |
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