Nano-structured surfaces
We adapted two vacuum systems, one of which is in the Harvard CNS clean-room, to implement the GLAD shadow-growth method. The technique is quite general and a number of materials can be deposited, with a large range of surface morphologies. In particular, it lets us grow nano-structured surfaces, including helical (chiral) ones, on entire wafers using electron beam evaporation. Not only the surfaces are of interest, but the structures may also be desorbed from the wafer and studied in their own right.
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Figure: Vacuum chamber with electron beam evaporator and GLAD substrate manipulator. |
We are currently exploring the rich physics of nanostructured surfaces (see a few pictures below).
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