Observation of magnetic nanoparticles ring formation and dynamics with fast video camera

Marcin Bacia, Jan Masajada, Sławomir Drobczyński


The holographic optical tweezers were used to show the interaction between strongly focused laser beam and magnetic nanoparticles in ferrofluid. When the light intensity was high enough, magnetic nanoparticles were removed from the beam center and they formed a dark ring. This behavior was observed in slow motion. Creation of dark rings is a very dynamic process, which was further described in the following paper.

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Supplementary media files:
Movie File 1 (AVI, 5.75 MB)
Movie File 2 (AVI, 5.01 MB)
Movie File 3 (AVI, 3.03 MB)

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
Published in cooperation with SPIE

ISSN: 2080-2242