gold nanorods (IMAGE)
Caption
Electron micrograph of gold nanorods overcoated with iron oxide nanoparticles and aligned in a magnetic field. When dispersed in water, gold nanorods overcoated with iron oxide nanoparticles align along the magnetic field pattern generated by arrays of permanent magnets, resulting in polarization-dependent absorption and scattering of light. Double-headed arrows indicate the polarization axis of a linear polarizer through which the sample was photographed.
Credit
Mehedi H. Rizvi
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