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Technology update

Dec 12, 2006

Electron microscope makes movies

Physicists have created a new form of electron microscopy that can make "movies" of atoms as they undergo ultra-rapid chemical or structural transitions. Ahmed Zewail and colleagues at the California Institute of Technology in the US have used coincident electron and laser pulses to follow vanadium and oxygen atoms as they rearranged themselves on a vanadium oxide surface over the course of several picoseconds. The researchers say that the technique could also be used to study a wide range of ultrafast biological and physical phenomena. (Proc. Natl. Acad. Sci. 103 18427).

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