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CONTROLLING
ORDER IN 2D FILMS OF BLOCK COPOLYMERS
Block copolymers will self-assemble into domains with size and periodicity
on the order of tens of nanometers. There are many possible applications
for thin films of block copolymers, such as lithography on the nanoscale
for the production of magnetic storage media, that require extremely
well ordered grains. By using graphoepitaxy, laterally confining
domains on a length scale much larger than the periodicity of domains,
we are able to template a single grain in hexagonal wells 12µm
between parallel edges. We investigate the effect of well depth
and sidewall angle on the order of domains of block copolymer. Moiré
interference patterns in scanning force microscopy are used to investigate
the grain size and orientation within the hexagonal wells.
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