Description:  These microscopic glowing spheres can be used to record data or security marks. Each sphere can glow in two colors. The image on the right shows a pair of letters written in the same set of spheres.
Source:  University of Toronto
Story:  Nanoparticle dyes boost storage
TRN January 14/21, 2003
TRN Categories:  Nanotechnology; Data Storage Technology; Cryptography and Security
Form:  Still

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