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Pixie Footprint

By Carmen M. López

 

Researchers grew this structure on the surface of a metallic lithium electrode by applying and evaporating a solution containing a lithium salt. The shapes that form depend on the concentration of the lithium salt, so changing the concentration of the salt produces various different patterns, some of them quite curious. This is an image straight from the scanning electron microscope--unaltered in any way.

 

--more details--

Scanning Electron Micrograph. Polyether sulfone polymer casted by solvent evaporation on the surface of a metallic lithium electrode. The casting solution also contains a lithium salt. The morphology of the polymer layer (i.e. the shape of its surface), strongly depends on the concentration of the lithium salt in the casting solution, therefore, changing the concentration of the salt produces various different patterns, some of them quite curious.

 

Argonne National Laboratory.

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Taken on October 2, 2009