High-Moment Antiferromagnetic Nanoparticles with Tunable Magnetic Properties


  • This work was supported by grants from the NIH (1U54CA119367-01) and DARPA/Navy (N00014-02-1-0807), a Stanford Graduate Fellowship (W.H.), and a Whittaker Foundation Graduate Fellowship (S.J.O.). We also acknowledge the use of the Stanford Nanofabrication Facility and the Stanford Nanocharacterization Laboratory, partially supported by the NSF, and the Stanford Nanomagnetics Facility. Supporting Information is available online from Wiley InterScience or from the authors.


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Synthetic antiferromagnetic (SAF) nanoparticles are fabricated by a combination of nanoimprint lithography and ferromagne tic multilayer structures, followed by release and stabilization of nanoparticles in solution. The SAF nanoparticles have desirable magnetic properties with respect to multiplex magnetic labeling and sorting, and can be functionalized with fluorescent dyes.