Driving dynamic colloidal assembly using eccentric self-propelled colloids
Designing protocols to dynamically direct the self-assembly of colloidal particles has become an important direction in soft matter physics because of promising applications in the fabrication of dynamic responsive functional materials. Here, using computer simulations, we found that in the mixture...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/86579 http://hdl.handle.net/10220/48324 |
| _version_ | 1811696784887513088 |
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| author | Ma, Zhan Lei, Qun-li Ni, Ran |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Ma, Zhan Lei, Qun-li Ni, Ran |
| author_sort | Ma, Zhan |
| collection | NTU |
| description | Designing protocols to dynamically direct the self-assembly of colloidal particles has become an important direction in soft matter physics because of promising applications in the fabrication of dynamic responsive functional materials. Here, using computer simulations, we found that in the mixture of passive colloids and eccentric self-propelled active particles, when the eccentricity and self-propulsion of active particles are high enough, the eccentric active particles can push passive colloids to form a large dense dynamic cluster, and the system undergoes a novel dynamic demixing transition. Our simulations show that the dynamic demixing occurs when the eccentric active particles move much faster than the passive particles such that the dynamic trajectories of different active particles can overlap each other while passive particles are depleted from the dynamic trajectories of active particles. Our results suggest that this is in analogy to the entropy-driven demixing in colloid–polymer mixtures, in which polymer random coils can overlap with each other while depleting the colloids. More interestingly, we find that by fixing the passive colloid composition at a certain value with increasing density, the system undergoes an intriguing re-entrant mixing, and the demixing only occurs within a certain intermediate density range. This suggests a new way of designing active matter to drive the self-assembly of passive colloids and fabricate dynamic responsive materials. |
| first_indexed | 2024-10-01T07:44:52Z |
| format | Journal Article |
| id | ntu-10356/86579 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:44:52Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/865792023-12-29T06:52:45Z Driving dynamic colloidal assembly using eccentric self-propelled colloids Ma, Zhan Lei, Qun-li Ni, Ran School of Chemical and Biomedical Engineering Trajectories DRNTU::Engineering::Chemical engineering Colloidal Designing protocols to dynamically direct the self-assembly of colloidal particles has become an important direction in soft matter physics because of promising applications in the fabrication of dynamic responsive functional materials. Here, using computer simulations, we found that in the mixture of passive colloids and eccentric self-propelled active particles, when the eccentricity and self-propulsion of active particles are high enough, the eccentric active particles can push passive colloids to form a large dense dynamic cluster, and the system undergoes a novel dynamic demixing transition. Our simulations show that the dynamic demixing occurs when the eccentric active particles move much faster than the passive particles such that the dynamic trajectories of different active particles can overlap each other while passive particles are depleted from the dynamic trajectories of active particles. Our results suggest that this is in analogy to the entropy-driven demixing in colloid–polymer mixtures, in which polymer random coils can overlap with each other while depleting the colloids. More interestingly, we find that by fixing the passive colloid composition at a certain value with increasing density, the system undergoes an intriguing re-entrant mixing, and the demixing only occurs within a certain intermediate density range. This suggests a new way of designing active matter to drive the self-assembly of passive colloids and fabricate dynamic responsive materials. ASTAR (Agency for Sci., Tech. and Research, S’pore) MOE (Min. of Education, S’pore) Accepted version 2019-05-22T08:51:54Z 2019-12-06T16:25:08Z 2019-05-22T08:51:54Z 2019-12-06T16:25:08Z 2017 Journal Article Ma, Z., Lei, Q.-l., & Ni, R. (2017). Driving dynamic colloidal assembly using eccentric self-propelled colloids. Soft Matter, 13(47), 8940-8946. doi:10.1039/C7SM01730H 1744-683X https://hdl.handle.net/10356/86579 http://hdl.handle.net/10220/48324 10.1039/C7SM01730H en Soft Matter © 2017 The Author(s). All rights reserved. This paper was published by The Royal Society of Chemistry in Soft Matter and is made available with permission of The Author(s). 7 p. application/pdf |
| spellingShingle | Trajectories DRNTU::Engineering::Chemical engineering Colloidal Ma, Zhan Lei, Qun-li Ni, Ran Driving dynamic colloidal assembly using eccentric self-propelled colloids |
| title | Driving dynamic colloidal assembly using eccentric self-propelled colloids |
| title_full | Driving dynamic colloidal assembly using eccentric self-propelled colloids |
| title_fullStr | Driving dynamic colloidal assembly using eccentric self-propelled colloids |
| title_full_unstemmed | Driving dynamic colloidal assembly using eccentric self-propelled colloids |
| title_short | Driving dynamic colloidal assembly using eccentric self-propelled colloids |
| title_sort | driving dynamic colloidal assembly using eccentric self propelled colloids |
| topic | Trajectories DRNTU::Engineering::Chemical engineering Colloidal |
| url | https://hdl.handle.net/10356/86579 http://hdl.handle.net/10220/48324 |
| work_keys_str_mv | AT mazhan drivingdynamiccolloidalassemblyusingeccentricselfpropelledcolloids AT leiqunli drivingdynamiccolloidalassemblyusingeccentricselfpropelledcolloids AT niran drivingdynamiccolloidalassemblyusingeccentricselfpropelledcolloids |