Volume 90 Issue 2 | p. 33 | Concentrates
Issue Date: January 9, 2012

Nanoparticles Imaged In Space And Time

Ultrafast electron microscopy maps time-resolved electric fields on and around nanostructures
Department: Science & Technology
Keywords: electron microscopy, ultrafast spectrum imaging, plasmonics, nanoparticles, electron energy gain/loss spectroscopy

A new electron microscopy technique, called ultrafast spectrum imaging, is capable of mapping electric fields across and around nanomaterials over time (Science, DOI: 10.1126/science.1213504). When photons of light strike a metal nanostructure, the object’s electrons oscillate collectively. This wave, known as a plasmon, generates a localized electric field that enables the tiny structure to be used as a photovoltaic component or as a sensor for nearby . . .

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