jMol
series
twin planes
Here's a spherical silicon nanosphere with
a single {111} twin plane. It divides two
lattices which are rotated 180 degrees from one
another about that plane. What's different
structurally on opposite sides of the highlighted plane?
Below to the left find a comparison between an experimental
high-res electron microscope image (top: green)
of a "nanotwin end" in germanium, and a simulated image (bottom: grey)
of the jmol model above. Any ideas how to explain the
difference?
Here is a darkfield image of a pair of <111> nanotwins
found in gigascale integrated circuit silicon as manufacturers were
working to scale up to the routine production of 12 inch
diameter wafers.
Below find comparison between that experimental Ge
image and a physical model put together by Danielle K
for a Science Fair project.
