PerspectiveElectron Microscopy

Laser-driven nanoparticle motion in liquids

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Science  03 Feb 2017:
Vol. 355, Issue 6324, pp. 458-459
DOI: 10.1126/science.aam6381

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Summary

Laser-driven electron microscopy is an incredibly powerful technique for filming the fastest processes in matter as they occur. A short laser pulse triggers the dynamics of interest, and a delayed electron flash then illuminates the scene for a moment. In this way, no camera shutter is required, and time-frozen snapshots of the action are obtained at a time resolution that is much faster than any detector can record (1, 2). On page 494 of this issue, Fu et al. (3) glimpse the rapid fluid dynamics of water-suspended nanoparticles in space and time by uniting their nanosecond transmission electron microscopy with a liquid-cell probing scheme.