Magnetic Nanotube Fabrication by Using Bacterial Magnetic Nanocrystals


  • This work was supported by the U.S. Department of Energy (DE-FG-02-01ER45935). I. B and L. Y. thank Prof. K. Fath at the Core Facilities for Imaging at Queens College–CUNY for the use of the transmission electron microscope.


Alignment of magnetic nanoparticles in nanotubes (see Figure) is produced using magnetic bacteria. The protein- and lipid-coated nanocrystals are extracted from the bacteria, and then introduced into peptide nanotubes where they are anchored by hydrogen bonding. The aligned nanoparticles behave as magnetic nanowires, with enhanced properties over unaligned magnetic nanocrystals.

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