Microdevice for Separation of Circulating Tumor Cells Using Embedded Magnetophoresis with V-shaped Ni-Co Nanowires and Immuno-nanomagnetic Beads

  • Park, Jeong Won (IT Convergence Technology Research Laboratory, ETRI) ;
  • Lee, Nae-Rym (IT Convergence Technology Research Laboratory, ETRI) ;
  • Cho, Sung Mok (IT Convergence Technology Research Laboratory, ETRI) ;
  • Jung, Moon Youn (IT Convergence Technology Research Laboratory, ETRI) ;
  • Ihm, Chunhwa (Department of Clinical Dignostic, Eulji University) ;
  • Lee, Dae-Sik (IT Convergence Technology Research Laboratory, ETRI)
  • Received : 2014.05.12
  • Accepted : 2014.12.08
  • Published : 2015.04.01


The novelty of this study resides in a 6"-wafer-level microfabrication protocol for a microdevice with a fluidic control system for the separation of circulating tumor cells (CTCs) from human whole blood cells. The microdevice utilizes a lateral magnetophoresis method based on immunomagnetic nanobeads with anti-epithelial cell adhesive molecule antibodies that selectively bind to epithelial cancer cells. The device consists of a top polydimethylsiloxane substrate for microfluidic control and a bottom substrate for lateral magnetophoretic force generation with embedded v-shaped soft magnetic microwires. The microdevice can isolate about 93% of the spiked cancer cells (MCF-7, a breast cancer cell line) at a flow rate of 40/100 mL/min with respect to a whole human blood/buffer solution. For all isolation, it takes only 10 min to process 400 mL of whole human blood. The fabrication method is sufficiently simple and easy, allowing the microdevice to be a mass-producible clinical tool for cancer diagnosis, prognosis, and personalized medicine.


Grant : CDx용 Liquid Biopsy Device 개발


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