Nanogallery
Nanogallery
TODAY OCTOBER 20, 2019

Bugs make magnetic crystals

Optical picture of a bug with a chain of magnetic crystals inside
Bugs, which make magnetic crystals for the purpose of orientation in the Earth magnetic fields, have been discovered.
Ruslan Prozorov from Ames Lab says this: There are bacteria called magnetotactic bacteria that produce perfect magnetite nanocrystals. We now know how to extract these and also how to produce them in vitro. The sizes range from >2 nm for synthetic and >30 nm for biological magnetite. There are several interesting aspects here. First is to study the Verwey transition in individual nanocrystal using something like Alexey's templating method. Second, you could use them as a little magnet for various experiments related to spin manipulation and where you need local fields (say a particle in a squid loop). More information see here: http://www3.interscience.wiley.com/cgi-bin/abstract/114096812/ABSTRACT?CRETRY=1&SRETRY=0 and http://arxiv.org/abs/cond-mat/0703306

Related Links:
  • Page under construction about magnetic bugs
  • Single molecules can be used as perfect templates or scaffolds for metal deposition. 
For example, it is possible to decorate a single nanotube with a film of amorphous metal and produce a homogeneous nanowire of width in the range 5-10 nm.
    Nanowerk Nanotechnology Portal
    http://www.nanowerk.com

    Nanohedron
    http://www.nanohedron.com

    Biomolecules
    http://perso.curie.fr/Simon.Sc..


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