Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion
A central ambition of the robotics field has been to increasingly miniaturize such systems, with perhaps the ultimate achievement being the synthetic microbe or cell sized machine. To this end, we have introduced and demonstrated prototypes of what we call colloidal state machines (CSMs) as particul...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Royal Society of Chemistry (RSC)
2021
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| Online Access: | https://hdl.handle.net/1721.1/132645 |
| _version_ | 1826205336986451968 |
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| author | Liu, Albert Tianxiang Yang, Jing LeMar, Lexy N. Zhang, Ge Pervan, Ana Murphey, Todd D. Strano, Michael S. |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Liu, Albert Tianxiang Yang, Jing LeMar, Lexy N. Zhang, Ge Pervan, Ana Murphey, Todd D. Strano, Michael S. |
| author_sort | Liu, Albert Tianxiang |
| collection | MIT |
| description | A central ambition of the robotics field has been to increasingly miniaturize such systems, with perhaps the ultimate achievement being the synthetic microbe or cell sized machine. To this end, we have introduced and demonstrated prototypes of what we call colloidal state machines (CSMs) as particulate devices capable of integrating sensing, memory, and energy harvesting as well as other functions onto a single particle. One technique that we have introduced for creating CSMs based on 2D materials such as graphene or monolayer MoS₂ is “autoperforation”, where the nanometer-scale film is fractured around a designed strain field to produce structured particles upon liftoff. While CSMs have been demonstrated with functions such as memory, sensing, and energy harvesting, the property of locomotion has not yet been demonstrated. In this work, we introduce an inversion moulding technique compatible with autoperforation that allows for the patterning of an external catalytic surface that enables locomotion in an accompanying fuel bath. Optimal processing conditions for electroplating a catalytic Pt layer to one side of an autoperforated CSM are elucidated. The self-driven propulsion of the resulting Janus CSM in H₂O₂ is studied, including the average velocity, as a function of fluid surface tension and H₂O₂ concentration in the bath. Since machines have to encode for a specific task, this work summarizes efforts to create a microfluidic testbed that allows for CSM designs to be evaluated for the ultimate purpose of navigation through complex fluidic networks, such as the human circulatory system. We introduce two CSM designs that mimic aspects of human immunity to solve search and recruitment tasks in such environments. These results advance CSM design concepts closer to promising applications in medicine and other areas. |
| first_indexed | 2024-09-23T13:11:24Z |
| format | Article |
| id | mit-1721.1/132645 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:11:24Z |
| publishDate | 2021 |
| publisher | Royal Society of Chemistry (RSC) |
| record_format | dspace |
| spelling | mit-1721.1/1326452022-10-01T13:39:22Z Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion Liu, Albert Tianxiang Yang, Jing LeMar, Lexy N. Zhang, Ge Pervan, Ana Murphey, Todd D. Strano, Michael S. Massachusetts Institute of Technology. Department of Chemical Engineering A central ambition of the robotics field has been to increasingly miniaturize such systems, with perhaps the ultimate achievement being the synthetic microbe or cell sized machine. To this end, we have introduced and demonstrated prototypes of what we call colloidal state machines (CSMs) as particulate devices capable of integrating sensing, memory, and energy harvesting as well as other functions onto a single particle. One technique that we have introduced for creating CSMs based on 2D materials such as graphene or monolayer MoS₂ is “autoperforation”, where the nanometer-scale film is fractured around a designed strain field to produce structured particles upon liftoff. While CSMs have been demonstrated with functions such as memory, sensing, and energy harvesting, the property of locomotion has not yet been demonstrated. In this work, we introduce an inversion moulding technique compatible with autoperforation that allows for the patterning of an external catalytic surface that enables locomotion in an accompanying fuel bath. Optimal processing conditions for electroplating a catalytic Pt layer to one side of an autoperforated CSM are elucidated. The self-driven propulsion of the resulting Janus CSM in H₂O₂ is studied, including the average velocity, as a function of fluid surface tension and H₂O₂ concentration in the bath. Since machines have to encode for a specific task, this work summarizes efforts to create a microfluidic testbed that allows for CSM designs to be evaluated for the ultimate purpose of navigation through complex fluidic networks, such as the human circulatory system. We introduce two CSM designs that mimic aspects of human immunity to solve search and recruitment tasks in such environments. These results advance CSM design concepts closer to promising applications in medicine and other areas. 2021-09-27T15:58:34Z 2021-09-27T15:58:34Z 2020-06 2020-03 2021-06-17T15:46:23Z Article http://purl.org/eprint/type/JournalArticle 1359-6640 1364-5498 https://hdl.handle.net/1721.1/132645 Liu, Albert Tianxiang et al. "Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion." Faraday Discussions 227 (2021): 213-232. en http://dx.doi.org/10.1039/d0fd00030b Faraday Discussions Creative Commons Attribution Noncommercial 3.0 unported license https://creativecommons.org/licenses/by-nc/3.0/ application/pdf Royal Society of Chemistry (RSC) Royal Society of Chemistry (RSC) |
| spellingShingle | Liu, Albert Tianxiang Yang, Jing LeMar, Lexy N. Zhang, Ge Pervan, Ana Murphey, Todd D. Strano, Michael S. Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion |
| title | Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion |
| title_full | Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion |
| title_fullStr | Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion |
| title_full_unstemmed | Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion |
| title_short | Autoperforation of two-dimensional materials to generate colloidal state machines capable of locomotion |
| title_sort | autoperforation of two dimensional materials to generate colloidal state machines capable of locomotion |
| url | https://hdl.handle.net/1721.1/132645 |
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