A novel approach to accumulate superparamagnetic particles in aqueous environment using time-varying magnetic field

Ya Li Liu, Jing Jie Chen, Fiaz Ahmad, Tuo Di Zhang, Wei Hong Guo, Ya Jing Ye, Peng Shang, Da Chuan Yin

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Objective: Magnetic drug targeting (MDT) has attracted a lot of attention in recent years as a treatment to reduce side effects and improve efficacy. To realize successful MDT, a magnet system that can create suitable magnetic field is necessary. However, the existing technology has some shortcomings such as low targeting efficiency and unsatisfactory targeting effect. The method of using time-varying magnetic field proposed in this paper provides a new solution to this problem. Methods: In this work, a permanent magnet system providing rotational magnetic field (a time-varying magnetic field) was designed and constructed. Focusing experiments of Fe3O4 particles were carried out in this system, and the mechanism of the focusing was discussed via a simplified model. Results: By using the rotational magnetic field, superparamagnetic Fe3O4 particles can be successfully driven to the designated site within a short time. Our work showed that the time-varying magnetic field can drive the superparamagnetic particles to a focusing site, which is not possible under the same magnetic field without rotation, and the aggregation speed and effect are better than those under static field. Conclusion and Significance: Our results indicate that time-varying magnetic field can be a good choice for designing magnet systems for MDT. Moreover, the idea of using time-varying magnetic field for focusing superparamagnetic particles may be applicable in non-contact processings or manipulations of paramagnetic, superparamagnetic, or even ferromagnetic materials or objects in preparation of novel materials, robotic control of objects, and so on.

Original languageEnglish
Article number8827298
Pages (from-to)1558-1564
Number of pages7
JournalIEEE Transactions on Biomedical Engineering
Volume67
Issue number6
DOIs
StatePublished - Jun 2020

Keywords

  • Drug delivery system (dds)
  • Magnet system
  • Magnetic drug targeting (mdt)
  • Magnetic nanoparticles
  • Time-varying magnetic field

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