Issue Date: January 9, 2012
Nanoparticles Imaged In Space And Time
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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