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This article exaggerates the capability of transmission electron microscopy by stating that “individual lithium ions” are seen. The research paper described says that the features imaged correspond to columns of lithium, cobalt, and oxygen atoms in a sample estimated to be 17 unit cells thick.

Eliot D. Specht
Oak Ridge National Laboratory
Oak Ridge, Tenn.

True, but the image we presented from the paper shows the rows of atoms from one end, in effect giving a view of single ions. –J. Gorman