화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.26, No.12, 1108-1114, December, 2018
DOI10.1007/s13233-018-6153-6  Export Citation
Magnetically-Programmable Cylindrical Microparticles by Facile Reaping Method
Hyeongho Min1, Youngjin Choi2, Jaeyun Kim2, 3, Jungwook Kim4, †, and Changhyun Pang1, 2, †
  • 1SKKU Advanced Institute of Nanotechnology (SAINT), Suwon 16419, Korea
  • 2School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
  • 3Biomedical Institute for Convergence at SKKU (BICS), Suwon 16419, Korea
  • 4Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 04107, Korea
E-mail:,
Various shapes of magnetically-programmed polyethylene glycol (PEG)-based particles with Fe3O4 blocks were harvested by a facile reaping method. Specifically, elastic PEG-based particles can be obtained by applying uniform shear stress onto the array of densely-populated PEG/Fe3O4 microstructures. A simple theory based on geometric and material properties was developed based on experimental observations to produce highly uniform cylindrical microparticles in a cost-effective manner. We analyzed the force balance of hairy architectures to explain the uniform cutting process, which is based on operating zones with various geometries and material elasticity. Here, the alignments of mono-/multi-dispersed iron oxide (Fe3O4) in microparticles can be tunable by changing the external magnetic field during replications. Furthermore, the collective reversible motions of different magneto-responsive PEG particles were observed when the external magnetic field was controlled, wherein such behaviors can be applied in potential medial applications such as controllable drug-delivery or microrobotics.
Keywords:microparticle;magnetic particle;microstructure;composite;deflection force
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