Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network
Directed transport of biological species across the surface of a substrate is essential for realizing lab-on-chip technologies. Approaches that utilize localized magnetic fields to manipulate magnetic particles carrying biological entities are attractive owing to their sensitivity, selectivity, and...
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| Format: | Article |
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Nature Publishing Group
2017
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| Online Access: | http://hdl.handle.net/1721.1/111659 |
| _version_ | 1826212023902404608 |
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| author | Rapoport, Elizabeth Ashera Beach, Geoffrey Stephen |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Rapoport, Elizabeth Ashera Beach, Geoffrey Stephen |
| author_sort | Rapoport, Elizabeth Ashera |
| collection | MIT |
| description | Directed transport of biological species across the surface of a substrate is essential for realizing lab-on-chip technologies. Approaches that utilize localized magnetic fields to manipulate magnetic particles carrying biological entities are attractive owing to their sensitivity, selectivity, and minimally disruptive impact on biomaterials. Magnetic domain walls in magnetic tracks produce strong localized fields and can be used to capture, transport, and detect individual superparamagnetic microbeads. The dynamics of magnetic microbead transport by domain walls has been well studied. However, demonstration of more complex functions such as selective motion and sorting using continuously driven domain walls in contiguous magnetic tracks is lacking. Here, a junction architecture is introduced that allows for branching networks in which superparamagnetic microbeads can be routed along dynamically-selected paths by a combination of rotating in-plane field for translation, and a pulsed out-of-plane field for path selection. Moreover, experiments and modeling show that the select-field amplitude is bead-size dependent, which allows for digital sorting of multiple bead populations using automated field sequences. This work provides a simple means to implement complex routing networks and selective transport functionalities in chip-based devices using magnetic domain wall conduits. |
| first_indexed | 2024-09-23T15:14:56Z |
| format | Article |
| id | mit-1721.1/111659 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T15:14:56Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1116592022-09-29T13:39:43Z Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network Rapoport, Elizabeth Ashera Beach, Geoffrey Stephen Massachusetts Institute of Technology. Department of Materials Science and Engineering Rapoport, Elizabeth Ashera Beach, Geoffrey Stephen Directed transport of biological species across the surface of a substrate is essential for realizing lab-on-chip technologies. Approaches that utilize localized magnetic fields to manipulate magnetic particles carrying biological entities are attractive owing to their sensitivity, selectivity, and minimally disruptive impact on biomaterials. Magnetic domain walls in magnetic tracks produce strong localized fields and can be used to capture, transport, and detect individual superparamagnetic microbeads. The dynamics of magnetic microbead transport by domain walls has been well studied. However, demonstration of more complex functions such as selective motion and sorting using continuously driven domain walls in contiguous magnetic tracks is lacking. Here, a junction architecture is introduced that allows for branching networks in which superparamagnetic microbeads can be routed along dynamically-selected paths by a combination of rotating in-plane field for translation, and a pulsed out-of-plane field for path selection. Moreover, experiments and modeling show that the select-field amplitude is bead-size dependent, which allows for digital sorting of multiple bead populations using automated field sequences. This work provides a simple means to implement complex routing networks and selective transport functionalities in chip-based devices using magnetic domain wall conduits. 2017-09-29T18:54:18Z 2017-09-29T18:54:18Z 2017-08 2017-04 2017-09-29T12:11:55Z Article http://purl.org/eprint/type/JournalArticle 2045-2322 http://hdl.handle.net/1721.1/111659 Rapoport, Elizabeth, and Beach, Geoffrey S. D. “Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network.” Scientific Reports 7, 1 (August 2017) © 2017 The Author(s) http://dx.doi.org/10.1038/s41598-017-10149-9 Scientific Reports Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature |
| spellingShingle | Rapoport, Elizabeth Ashera Beach, Geoffrey Stephen Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network |
| title | Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network |
| title_full | Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network |
| title_fullStr | Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network |
| title_full_unstemmed | Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network |
| title_short | Architecture for Directed Transport of Superparamagnetic Microbeads in a Magnetic Domain Wall Routing Network |
| title_sort | architecture for directed transport of superparamagnetic microbeads in a magnetic domain wall routing network |
| url | http://hdl.handle.net/1721.1/111659 |
| work_keys_str_mv | AT rapoportelizabethashera architecturefordirectedtransportofsuperparamagneticmicrobeadsinamagneticdomainwallroutingnetwork AT beachgeoffreystephen architecturefordirectedtransportofsuperparamagneticmicrobeadsinamagneticdomainwallroutingnetwork |