Magnetic barcoded hydrogel microparticles for multiplexed detection

Ki Wan Bong, Stephen C. Chapin, Patrick S. Doyle

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


Magnetic polymer particles have been used in a wide variety of applications ranging from targeting and separation to diagnostics and imaging. Current synthesis methods have limited these particles to spherical or deformations of spherical morphologies. In this paper, we report the use of stop flow lithography to produce magnetic hydrogel microparticles with a graphical code region, a probe region, and a magnetic tail region. These anisotropic multifunctional magnetic polymer particles are an enhanced version of previously synthesized "barcoded" particles ( Science, 2007,315,1393-1396) developed for the sensitive and rapid multiplexed sensing of nucleic acids. The newly added magnetic region has acquired, dipole moments in the presence of weak homogeneous magnetic fields, allowing the particles to align along the applied field, direction. The novel magnetic properties have led to practical applications in the efficient orientation and separation of the barcoded microparticles during biological assays without disrupting detection capabilities.

Original languageEnglish
Pages (from-to)8008-8014
Number of pages7
Issue number11
Publication statusPublished - 2010 Jun 1
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry


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