Magnetic nanotube fabrication by using bacterial magnetic nanocrystals

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 its magnetic nanowires, with enhanced properties over unaligned magnetic nanocrystals.