Highly sensitive spin-valve devices for chip-cytometers

Jong Wook Roh, Oh Taek Son, Young Tack Lee, Kyoung Il Lee, Hyo Il Jung, Wooyoung Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The highly sensitive spin-valve devices integrated with a microfluidic channel have been studied for cell counting in a chip-cytometer. The presence or absence of a single magnetic bead was successfully detected by direct measurement of fringe fields emanating from magnetic beads using spin-valve devices. The real-time detection was also successfully con-firmed by the direct measurement of magnetic fields generated from the magnetic beads passing an active sensing area of a spin-valve device integrated with a microfluidic channel. Our results show the possibility of implementing a chipcytometer for biological applications using the highly sensitive spin-valve devices integrated with a microfluidic device.

Original languageEnglish
Pages (from-to)1636-1640
Number of pages5
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number7
Publication statusPublished - 2009 Jul

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry


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