Dynamic microcontainers as microvacuums for collecting nanomaterials after clinical treatments

Daniel S. Choi, Jungrae Park, Ke Xu, Rose Kringel, John J. Choi, In Tak Jeon, Young Keun Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We present a feasible method to collect ferromagnetic nanomaterials (FNMs) after clinical utilization by employing ferromagnetic micro-containers (MCs). The cubic MCs with dimensions of 200 micrometers have gold-coated nickel frames and were tethered such a way that they are able to remove FNMs from cells with the use of an external magnetic field. The study has been conducted in two parts: 1) enhancement of the motion of MCs in glass-based microfluidic channels filled with viscous fluids by magnetically-driven spinning MCs, i.e., 'dynamic MCs'; 2) sweeping FNMs from the cells using magnetic attractive forces between FNMs and MCs through a 'microvacuum' process. Our study shows that spinning MCs can transport better than nonspinning MCs through viscous fluids. We found that approximately 70% of FNMs internalized with human embryonic cells (HEK-293) were removed from the cells by the spinning MCs. Such in-vitro experiments suggest the possibility of resolving the issue of removing FNMs used for clinical treatments from human body after treatments.

Original languageEnglish
Article number6559034
Pages (from-to)3464-3467
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number7
Publication statusPublished - 2013


  • Dynamic nanowires
  • ferromagnetic nanomaterials
  • microcontainer
  • microfluidics
  • microvacuum

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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