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Axial electrokinetic trapping of anisotropic particles

Filip Strubbe (UGent) , Bavo Robben (UGent) , John Puthenparampil George (UGent) , Ingrid Amer Cid (UGent) , Filip Beunis (UGent) and Kristiaan Neyts (UGent)
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Abstract
Anti-Brownian electrokinetic trapping is a method for trapping single particles in liquid based on particle position measurements and the application of feedback voltages. To achieve trapping in the axial direction, information on the axial particle position is required. However, existing strategies for determining the axial position that are based on measuring the size of the first diffraction ring, theory fitting, advanced optical setups or pre-determined axial image stacks are impractical for anisotropic particles. In this work, axial electrokinetic trapping of anisotropic particles is realized in devices with planar, transparent electrodes. The trapping algorithm uses Fourier-Bessel decomposition of standard microscopy images and is learning from the correlation between applied voltages and changes in the particle appearance. No previous knowledge on the particle appearance, theory fitting or advanced optical setup is required. The particle motion in the trap and the influence of screening of the electric field on this motion are analyzed. The axial trapping method opens new possibilities for measuring properties of anisotropic or isotropic particles and forces acting on such particles.
Keywords
COLLOIDAL PARTICLES, BROWNIAN-MOTION, TRACKING, PRECISION, TRAPS, FORCE, MASS, CELL

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MLA
Strubbe, Filip, et al. “Axial Electrokinetic Trapping of Anisotropic Particles.” SCIENTIFIC REPORTS, vol. 9, 2019, doi:10.1038/s41598-019-39224-z.
APA
Strubbe, F., Robben, B., Puthenparampil George, J., Amer Cid, I., Beunis, F., & Neyts, K. (2019). Axial electrokinetic trapping of anisotropic particles. SCIENTIFIC REPORTS, 9. https://doi.org/10.1038/s41598-019-39224-z
Chicago author-date
Strubbe, Filip, Bavo Robben, John Puthenparampil George, Ingrid Amer Cid, Filip Beunis, and Kristiaan Neyts. 2019. “Axial Electrokinetic Trapping of Anisotropic Particles.” SCIENTIFIC REPORTS 9. https://doi.org/10.1038/s41598-019-39224-z.
Chicago author-date (all authors)
Strubbe, Filip, Bavo Robben, John Puthenparampil George, Ingrid Amer Cid, Filip Beunis, and Kristiaan Neyts. 2019. “Axial Electrokinetic Trapping of Anisotropic Particles.” SCIENTIFIC REPORTS 9. doi:10.1038/s41598-019-39224-z.
Vancouver
1.
Strubbe F, Robben B, Puthenparampil George J, Amer Cid I, Beunis F, Neyts K. Axial electrokinetic trapping of anisotropic particles. SCIENTIFIC REPORTS. 2019;9.
IEEE
[1]
F. Strubbe, B. Robben, J. Puthenparampil George, I. Amer Cid, F. Beunis, and K. Neyts, “Axial electrokinetic trapping of anisotropic particles,” SCIENTIFIC REPORTS, vol. 9, 2019.
@article{8606486,
  abstract     = {Anti-Brownian electrokinetic trapping is a method for trapping single particles in liquid based on particle position measurements and the application of feedback voltages. To achieve trapping in the axial direction, information on the axial particle position is required. However, existing strategies for determining the axial position that are based on measuring the size of the first diffraction ring, theory fitting, advanced optical setups or pre-determined axial image stacks are impractical for anisotropic particles. In this work, axial electrokinetic trapping of anisotropic particles is realized in devices with planar, transparent electrodes. The trapping algorithm uses Fourier-Bessel decomposition of standard microscopy images and is learning from the correlation between applied voltages and changes in the particle appearance. No previous knowledge on the particle appearance, theory fitting or advanced optical setup is required. The particle motion in the trap and the influence of screening of the electric field on this motion are analyzed. The axial trapping method opens new possibilities for measuring properties of anisotropic or isotropic particles and forces acting on such particles.},
  articleno    = {2806},
  author       = {Strubbe, Filip and Robben, Bavo and Puthenparampil George, John and Amer Cid, Ingrid and Beunis, Filip and Neyts, Kristiaan},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  keywords     = {COLLOIDAL PARTICLES,BROWNIAN-MOTION,TRACKING,PRECISION,TRAPS,FORCE,MASS,CELL},
  language     = {eng},
  title        = {Axial electrokinetic trapping of anisotropic particles},
  url          = {http://dx.doi.org/10.1038/s41598-019-39224-z},
  volume       = {9},
  year         = {2019},
}

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