Ellipsoids can be made in micro-meter size by stretching spheres. The idea is to put microspheres into an embedding film, heat the composite, stretch stripes of this film, cool down, and dissolve the film to recover the particles. Keville and coworkers invented this. Below you can see the stretcher I made in Konstanz:


The pink stripes contain particles which are colored with Rhodamin B, a fluorescent dye, so we can see them in confocal 3D microscopes.

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