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  • Illustration of nanosized device made of two joined silver single crystals that generate light by inelastical electron tunneling.
    Steven Bopp
    Illustration of nanosized device made of two joined silver single crystals that generate light by inelastical electron tunneling.
  • Left: schematics of the tunnel junction formed by two edge-to-edge silver single crystal cuboids with an insulating barrier of polyvinylpyrrolidone (PVP). The top inset shows that photons are generated through inelastic electron tunneling. The device performance can be engineered by tuning the size of the cuboids (a, b, c), the gap size (d), and the curvature of silver cuboid edges. Right: TEM image of the tunnel junction, where the gap is around 1.5 nm.
    Haoliang Qian/Nature Photonics
    Left: schematics of the tunnel junction formed by two edge-to-edge silver single crystal cuboids with an insulating barrier of polyvinylpyrrolidone (PVP). The top inset shows that photons are generated through inelastic electron tunneling. The device performance can be engineered by tuning the size of the cuboids (a, b, c), the gap size (d), and the curvature of silver cuboid edges. Right: TEM image of the tunnel junction, where the gap is around 1.5 nm.
  • SEM images of silver nanocrystal-based tunnel junctions grown with different dimensions.
    Haoliang Qian/Nature Photonics
    SEM images of silver nanocrystal-based tunnel junctions grown with different dimensions.
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