Controlling and manipulating living cell motions in solution hold a high promise in developing new biotechnology and biological science. Here, we developed a magnetic tweezers device that employs a combination of two permanent magnets in up-down double-ring configuration axially fitting with a microscopic objective, allowing a picoNewton (pN) bidirectional force and motion control on the sample beyond a single upward pulling direction. The experimental force calibration and magnetic field simulation using finite element method magnetics demonstrate that the designed magnetic tweezers covers a linear-combined pN force with positive-negative polarization changes in a tenability of sub-pN scale, which can be utilized to further achieve motion manipulation by shifting the force balance. We demonstrate an application of the up-down double-ring magnetic tweezers for single cell manipulation, showing that the cells with internalized paramagnetic beads can be selectively picked up and guided in a controlled fine motion.
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July 2017
Research Article|
July 31 2017
Manipulating motions of targeted single cells in solution by an integrated double-ring magnetic tweezers imaging microscope
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Meiling Wu
;
Meiling Wu
Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University
, Bowling Green, Ohio 43403, USA
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Rajeev Yadav;
Rajeev Yadav
Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University
, Bowling Green, Ohio 43403, USA
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Nibedita Pal;
Nibedita Pal
Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University
, Bowling Green, Ohio 43403, USA
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H. Peter Lu
H. Peter Lu
a)
Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University
, Bowling Green, Ohio 43403, USA
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Meiling Wu
Rajeev Yadav
Nibedita Pal
H. Peter Lu
a)
Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University
, Bowling Green, Ohio 43403, USA
a)
Author to whom correspondence should be addressed: [email protected]
Rev. Sci. Instrum. 88, 073703 (2017)
Article history
Received:
April 28 2017
Accepted:
July 09 2017
Citation
Meiling Wu, Rajeev Yadav, Nibedita Pal, H. Peter Lu; Manipulating motions of targeted single cells in solution by an integrated double-ring magnetic tweezers imaging microscope. Rev. Sci. Instrum. 1 July 2017; 88 (7): 073703. https://doi.org/10.1063/1.4995362
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