SEM images of cylindrical PS--PMMA domain structures with (a) multiple grains and a size distribution of and (b) single grain and a size distribution of .
Block copolymer domains confined in a trench: (a) SEM images of 7, 8, 11, and 13 rows (from left to right) of perpendicularly oriented cylindrical domains aligned along the trench sidewall and (b) domain size sigma and spacing sigma as a function of the number of rows in the trench.
Direction-dependent domain size variation: (a) well-aligned block copolymer domains in a trench and (b) size variation in both along-axis and across-axis directions.
Block copolymer domains aligned in preferential trenches without surface neutralization: (a) seven rows of PS--PMMA domains with spacing and (b) 17 rows of PS--PMMA domains with spacing.
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