On demand manipulation of ferrofluid droplets by magnetic fields
•Facile and controllable manipulation of ferrofluid droplet size by a permanent magnet.•Droplet merging and generation of larger droplets after merging studied.•Controllable change in droplet diameter, droplet diameter increased by three times.•Effect of magnetic field intensity, carrier medium visc...
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| Veröffentlicht in: | Sensors and actuators. B, Chemical Chemical, 2017-04, Vol.242, p.760-768 |
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| container_title | Sensors and actuators. B, Chemical |
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| creator | Ray, A. Varma, V.B. Jayaneel, P.J. Sudharsan, N.M. Wang, Z.P. Ramanujan, R.V. |
| description | •Facile and controllable manipulation of ferrofluid droplet size by a permanent magnet.•Droplet merging and generation of larger droplets after merging studied.•Controllable change in droplet diameter, droplet diameter increased by three times.•Effect of magnetic field intensity, carrier medium viscosity, initial droplet size, flow rates, and flow rate ratio on change in droplet size studied.•Droplet size change induced by the applied magnetic field is higher for a lower viscosity carrier medium.•Numerical simulations and experimental results show a similar trend.
Magnetic droplets, consisting of magnetic nanoparticles in a carrier fluid, are of high interest due to applications such as remote and wireless control in a microfluidic environment. We investigated the influence of magnetic field on the control of ferrofluid droplet size in a nonmagnetic carrier fluid. Generation of larger droplets by a re-pumping mechanism was studied. The magnetic field leads to coalescence and mixing of the magnetic droplets. A significant response of the ferrofluid droplets to changes in flow rate ratio, the viscosity of the carrier medium and magnetic field intensity was observed. The droplet size can be increased by three times of its initial diameter by tuning the magnetic field intensity. Our modeling results show a similar trend to the experimental findings. Such control, mixing, and re-pumping of droplets is relevant to novel Lab-on-a-Chip applications. |
| doi_str_mv | 10.1016/j.snb.2016.11.115 |
| format | Article |
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Magnetic droplets, consisting of magnetic nanoparticles in a carrier fluid, are of high interest due to applications such as remote and wireless control in a microfluidic environment. We investigated the influence of magnetic field on the control of ferrofluid droplet size in a nonmagnetic carrier fluid. Generation of larger droplets by a re-pumping mechanism was studied. The magnetic field leads to coalescence and mixing of the magnetic droplets. A significant response of the ferrofluid droplets to changes in flow rate ratio, the viscosity of the carrier medium and magnetic field intensity was observed. The droplet size can be increased by three times of its initial diameter by tuning the magnetic field intensity. Our modeling results show a similar trend to the experimental findings. Such control, mixing, and re-pumping of droplets is relevant to novel Lab-on-a-Chip applications.</description><identifier>ISSN: 0925-4005</identifier><identifier>EISSN: 1873-3077</identifier><identifier>DOI: 10.1016/j.snb.2016.11.115</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Actuation ; Chemical reactions ; Coalescence ; Coalescing ; Droplets ; Ferrofluid ; Ferrofluids ; Flow velocity ; Magnetic field ; Magnetic fields ; Nanoparticles ; Pumping ; Re-pumping ; Remote control ; Sedimentation & deposition ; Viscosity</subject><ispartof>Sensors and actuators. B, Chemical, 2017-04, Vol.242, p.760-768</ispartof><rights>2016 Elsevier B.V.</rights><rights>Copyright Elsevier Science Ltd. Apr 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c368t-cbdf681fdd3cb18a13c12b9f4f5a23abe28ef511fd6947b65303956d7d963fd83</citedby><cites>FETCH-LOGICAL-c368t-cbdf681fdd3cb18a13c12b9f4f5a23abe28ef511fd6947b65303956d7d963fd83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.snb.2016.11.115$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Ray, A.</creatorcontrib><creatorcontrib>Varma, V.B.</creatorcontrib><creatorcontrib>Jayaneel, P.J.</creatorcontrib><creatorcontrib>Sudharsan, N.M.</creatorcontrib><creatorcontrib>Wang, Z.P.</creatorcontrib><creatorcontrib>Ramanujan, R.V.</creatorcontrib><title>On demand manipulation of ferrofluid droplets by magnetic fields</title><title>Sensors and actuators. B, Chemical</title><description>•Facile and controllable manipulation of ferrofluid droplet size by a permanent magnet.•Droplet merging and generation of larger droplets after merging studied.•Controllable change in droplet diameter, droplet diameter increased by three times.•Effect of magnetic field intensity, carrier medium viscosity, initial droplet size, flow rates, and flow rate ratio on change in droplet size studied.•Droplet size change induced by the applied magnetic field is higher for a lower viscosity carrier medium.•Numerical simulations and experimental results show a similar trend.
Magnetic droplets, consisting of magnetic nanoparticles in a carrier fluid, are of high interest due to applications such as remote and wireless control in a microfluidic environment. We investigated the influence of magnetic field on the control of ferrofluid droplet size in a nonmagnetic carrier fluid. Generation of larger droplets by a re-pumping mechanism was studied. The magnetic field leads to coalescence and mixing of the magnetic droplets. A significant response of the ferrofluid droplets to changes in flow rate ratio, the viscosity of the carrier medium and magnetic field intensity was observed. The droplet size can be increased by three times of its initial diameter by tuning the magnetic field intensity. Our modeling results show a similar trend to the experimental findings. Such control, mixing, and re-pumping of droplets is relevant to novel Lab-on-a-Chip applications.</description><subject>Actuation</subject><subject>Chemical reactions</subject><subject>Coalescence</subject><subject>Coalescing</subject><subject>Droplets</subject><subject>Ferrofluid</subject><subject>Ferrofluids</subject><subject>Flow velocity</subject><subject>Magnetic field</subject><subject>Magnetic fields</subject><subject>Nanoparticles</subject><subject>Pumping</subject><subject>Re-pumping</subject><subject>Remote control</subject><subject>Sedimentation & deposition</subject><subject>Viscosity</subject><issn>0925-4005</issn><issn>1873-3077</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kE9LxDAQxYMouK5-AG8Fz62ZpklTvCiL_2BhL3oObTKRlG5Tk1bYb2-W9Sw8ZubwezPDI-QWaAEUxH1fxLEryjQWAEn8jKxA1ixntK7PyYo2Jc8rSvkluYqxp5RWTNAVedyNmcF9O5osFTctQzs7P2beZhZD8HZYnMlM8NOAc8y6Q8K-RpydzqzDwcRrcmHbIeLNX1-Tz5fnj81bvt29vm-etrlmQs657owVEqwxTHcgW2Aayq6xleVtydoOS4mWQwJEU9Wd4IyyhgtTm0YwayRbk7vT3in47wXjrHq_hDGdVCWVQpayFixRcKJ08DEGtGoKbt-GgwKqjkGpXqWg1DEoBZDEk-fh5MH0_o_DoKJ2OGo0LqCelfHuH_cvcplwvA</recordid><startdate>201704</startdate><enddate>201704</enddate><creator>Ray, A.</creator><creator>Varma, V.B.</creator><creator>Jayaneel, P.J.</creator><creator>Sudharsan, N.M.</creator><creator>Wang, Z.P.</creator><creator>Ramanujan, R.V.</creator><general>Elsevier B.V</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7SR</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>201704</creationdate><title>On demand manipulation of ferrofluid droplets by magnetic fields</title><author>Ray, A. ; Varma, V.B. ; Jayaneel, P.J. ; Sudharsan, N.M. ; Wang, Z.P. ; Ramanujan, R.V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c368t-cbdf681fdd3cb18a13c12b9f4f5a23abe28ef511fd6947b65303956d7d963fd83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Actuation</topic><topic>Chemical reactions</topic><topic>Coalescence</topic><topic>Coalescing</topic><topic>Droplets</topic><topic>Ferrofluid</topic><topic>Ferrofluids</topic><topic>Flow velocity</topic><topic>Magnetic field</topic><topic>Magnetic fields</topic><topic>Nanoparticles</topic><topic>Pumping</topic><topic>Re-pumping</topic><topic>Remote control</topic><topic>Sedimentation & deposition</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ray, A.</creatorcontrib><creatorcontrib>Varma, V.B.</creatorcontrib><creatorcontrib>Jayaneel, P.J.</creatorcontrib><creatorcontrib>Sudharsan, N.M.</creatorcontrib><creatorcontrib>Wang, Z.P.</creatorcontrib><creatorcontrib>Ramanujan, R.V.</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Sensors and actuators. 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Magnetic droplets, consisting of magnetic nanoparticles in a carrier fluid, are of high interest due to applications such as remote and wireless control in a microfluidic environment. We investigated the influence of magnetic field on the control of ferrofluid droplet size in a nonmagnetic carrier fluid. Generation of larger droplets by a re-pumping mechanism was studied. The magnetic field leads to coalescence and mixing of the magnetic droplets. A significant response of the ferrofluid droplets to changes in flow rate ratio, the viscosity of the carrier medium and magnetic field intensity was observed. The droplet size can be increased by three times of its initial diameter by tuning the magnetic field intensity. Our modeling results show a similar trend to the experimental findings. Such control, mixing, and re-pumping of droplets is relevant to novel Lab-on-a-Chip applications.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.snb.2016.11.115</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Actuation Chemical reactions Coalescence Coalescing Droplets Ferrofluid Ferrofluids Flow velocity Magnetic field Magnetic fields Nanoparticles Pumping Re-pumping Remote control Sedimentation & deposition Viscosity |
| title | On demand manipulation of ferrofluid droplets by magnetic fields |
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