Skip to main content
. Author manuscript; available in PMC: 2013 Oct 25.
Published in final edited form as: Nature. 2013 Apr 25;496(7446):486–489. doi: 10.1038/nature12072

Figure 1. Wide-field magnetic imaging microscope.

Figure 1

a, Home-built wide-field fluorescence microscope used for combined optical and magnetic imaging. Live magnetotactic bacteria (MTB) are placed in phosphate-buffered saline (PBS) on the surface of a diamond chip implanted with nitrogen vacancy (NV) centres. Vector magnetic field images are derived from optically detected magnetic resonance (ODMR)8–10 interrogation of NV centres excited by a totally-internally-reflected 532 nm laser beam, and spatially correlated with bright field optical images. b, Energy-level diagram of NV centre; see Methods for details. c, Typical transmission electron microscope (TEM) image of a Magnetospirillum magneticum AMB-1 bacterium. Magnetite nanoparticles appear as spots of high electron density.