Abstract
Physics![Figure][1] The whispering gallery at St. Paul's CREDITS: (TOP TO BOTTOM) GAO ET AL. ; © ANGELO HORNAK/ALAMY Physical barriers are used to confine waves. Whether it is harbor walls for sea waves, a glass disk for light, or the “whispering gallery” circular chamber walls in St. Paul's Cathedral for sound, the principle of confinement—reflection—is the same. Zhao et al. used that same principle to confine electrons in a nanoscale circular cavity in graphene. Periodic patterns within the cavity were associated with an electronic wave version of whispering gallery modes. The tunability of the cavity size may provide a route for the manipulation of electrons in graphene and similar materials. Science , this issue p. [672][2] [1]: pending:yes [2]: /lookup/doi/10.1126/science.aaa7469
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