Fabrication of novel magnetic Janus microparticles

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have designed a novel technique for fabrication of magnetic Janus microparticles based on "trapping" the alignment of magnetite nanoparticles dispersed within the oil drops of polymerizable oil-in-water emulsion. We polymerized the oil drops after gelling the continuous aqueous phase in the presence of an external magnetic filed. This allowed us to produce magnetic Janus particles with optical and magnetic anisotropy which form unusual zigzag chains and structures when an external magnetic field is applied to a suspension of such particles. These novel microparticles retain high remanence magnetization and coercivity values indicative of ferromagnetic behavior, which indicates that the composite polymeric Janus microparticles posses a net magnetic dipole and behave like micro-magnets due to the "trapped" orientation of the magnetite nanoparticles in their polymeric matrix.

Original languageEnglish
Title of host publicationDesign, Fabrication, and Self Assembly of "Patchy" and Anisometric Particles
PublisherMaterials Research Society
Pages35-40
Number of pages6
ISBN (Print)9781615677689
DOIs
Publication statusPublished - 2008
Event2008 MRS Fall Meeting - Boston, MA, United States
Duration: Dec 2 2008Dec 4 2008

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1135
ISSN (Print)0272-9172

Conference

Conference2008 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA
Period12/2/0812/4/08

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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