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Magic Trick with Gold and GlassNovember 07, 2005
Even the ancient Romans were familiar with processes for coloring glass by adding gold. Initially colorless, the glass takes on a ruby-red color when heated in a controlled fashion. The source of this color is finely divided gold clusters. The light absorption depends on the concerted oscillation of the conducting electrons in all of the gold atoms in the cluster, called plasmon oscillation. Variation of the size, shape, or electrical properties of the particles’ surroundings should influence the frequency of the oscillation and thus the color of the absorbed light. This could allow for the production of materials that are suitable for use in nanophotonic components, including tiny optoelectronic circuits or optical storage devices.
Author: Klaus Rademann, Humboldt-Universität zu Berlin (Germany),
Title: On the Chemistry of Gold in Silicate Glasses: Studies on a Nonthermally Activated Growth of Gold Nanoparticles
Angewandte Chemie International Edition, doi: 10.1002/anie.200502174
or David Greenberg (US)
or Julia Lampam (UK)
Copyright © Angewandte Chemie
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