20_18b/2008Inside Front Cover: A Quantum-Stabilized Mirror for Atoms (Adv. Mater. 18/2008)

The inside cover shows “the smoothest surface ever made”, a quantum-stabilized, atomically flat Pb film on Si(111), reflecting a He beam. Rodolfo Miranda, Amadeo L. Vazquez de Parga, and co-workers report on p. 3492 that this helium mirror can also be electrostatically bent to focus the He beam into a sub-micrometer spot, implying that current prototype scanning helium atom microscopy/diffractometry instruments could easily reach nanometer resolution.

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