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(a) AFM phase images of cross-sections of PS/poly(ethylene oxide) (PEO) layered films with 1000, 300, 75, and 25 nm thick PEO layers from left to right. (b) Schematic morphology evolution of PEO confined layers as the layer thickness is reduced from the microscale to the nanoscale. Reprinted with permission from Ref. [25]. Copyright (2012) Cambridge University Press.
