wire_picL (802K)
Scanning Tunneling Microscopy image revealing the cross-section through a GaAs nanowire.
Notice that the wire consists of two distinct almost equally large nanocrystallites
with completely different orientations of the crystal lattice.
Zoom-in shows the individual As atoms in the boundary between the two nanocrystalites of the wire.
Indeed the power of the STM is to visualize individual atoms directly!