Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids
The process of assembling particles into organized functional structures is influenced by the rheological properties of the matrix fluid in which the assembly takes place. Therefore, tuning these properties represents a viable and as yet unexplored approach for controlling particle assembly. In this...
| Main Authors: | , , |
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| Format: | Article |
| Language: | en_US |
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American Chemical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/79876 https://orcid.org/0000-0001-8323-2779 |
| _version_ | 1811089293746110464 |
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| author | Rich, Jason P. McKinley, Gareth H Doyle, Patrick S |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Rich, Jason P. McKinley, Gareth H Doyle, Patrick S |
| author_sort | Rich, Jason P. |
| collection | MIT |
| description | The process of assembling particles into organized functional structures is influenced by the rheological properties of the matrix fluid in which the assembly takes place. Therefore, tuning these properties represents a viable and as yet unexplored approach for controlling particle assembly. In this Letter, we examine the effect of the matrix fluid yield stress on the directed assembly of polarizable particles into linear chains under a uniform external magnetic field. Using particle-level simulations with a simple yield stress model, we find that chain growth follows the same trajectory as in Newtonian matrix fluids up to a critical time that depends on the balance between the yield stress and the strength of magnetic interactions between particles; subsequently, the system undergoes structural arrest. Appropriate dimensionless groups for characterizing the arresting behavior are determined and relationships between these groups and the resulting structural properties are presented. Since field-induced structures can be indefinitely stabilized by the matrix fluid yield stress and “frozen” into place as desired, this approach may facilitate the assembly of more complex and sophisticated structures. |
| first_indexed | 2024-09-23T14:16:55Z |
| format | Article |
| id | mit-1721.1/79876 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:16:55Z |
| publishDate | 2013 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | mit-1721.1/798762022-10-01T20:19:50Z Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids Rich, Jason P. McKinley, Gareth H Doyle, Patrick S Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Hatsopoulos Microfluids Laboratory Doyle, Patrick S. McKinley, Gareth H. Rich, Jason P. The process of assembling particles into organized functional structures is influenced by the rheological properties of the matrix fluid in which the assembly takes place. Therefore, tuning these properties represents a viable and as yet unexplored approach for controlling particle assembly. In this Letter, we examine the effect of the matrix fluid yield stress on the directed assembly of polarizable particles into linear chains under a uniform external magnetic field. Using particle-level simulations with a simple yield stress model, we find that chain growth follows the same trajectory as in Newtonian matrix fluids up to a critical time that depends on the balance between the yield stress and the strength of magnetic interactions between particles; subsequently, the system undergoes structural arrest. Appropriate dimensionless groups for characterizing the arresting behavior are determined and relationships between these groups and the resulting structural properties are presented. Since field-induced structures can be indefinitely stabilized by the matrix fluid yield stress and “frozen” into place as desired, this approach may facilitate the assembly of more complex and sophisticated structures. American Chemical Society (Petroleum Research Fund (ACS-PRF Grant No. 49956-ND9)) 2013-08-14T19:20:22Z 2013-08-14T19:20:22Z 2012-02 2012-02 Article http://purl.org/eprint/type/JournalArticle 0743-7463 1520-5827 http://hdl.handle.net/1721.1/79876 Rich, Jason P., Gareth H. McKinley, and Patrick S. Doyle. Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids. Langmuir 28, no. 8 (February 28, 2012): 3683-3689. https://orcid.org/0000-0001-8323-2779 en_US http://dx.doi.org/10.1021/la204240f Langmuir Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society MIT web domain |
| spellingShingle | Rich, Jason P. McKinley, Gareth H Doyle, Patrick S Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids |
| title | Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids |
| title_full | Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids |
| title_fullStr | Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids |
| title_full_unstemmed | Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids |
| title_short | Arrested Chain Growth During Magnetic Directed Particle Assembly in Yield Stress Matrix Fluids |
| title_sort | arrested chain growth during magnetic directed particle assembly in yield stress matrix fluids |
| url | http://hdl.handle.net/1721.1/79876 https://orcid.org/0000-0001-8323-2779 |
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