Sung Ho Kim, Oun-Ho Park, et al.
Small
We compare the time evolution of striped pattern correlation lengths for three different poly(styrene- b -methyl methacrylate) (PS-b-PMMA) diblock copolymer materials having comparable molecular diffusion rates. Striped patterns formed from cylindrical-phase materials coarsen with enhanced growth exponents and have reduced disclination diffusion activation energies as compared to striped patterns formed from smectic A lamellar-phase materials. The observed differences stem from distinct topological constraints in cylindrical (columnar) and lamellar (SmA) striped patterns. Cylindrical domains create a channel for layer breaking without molecule interdiffusion, facilitating an enhanced rate of pattern coarsening and reducing the disclination diffusion activation energy. © 2008 The American Physical Society.
Sung Ho Kim, Oun-Ho Park, et al.
Small
Shu-Jen Han, Dharmendar Reddy, et al.
ACS Nano
O.F. Schirmer, W. Berlinger, et al.
Solid State Communications
Biancun Xie, Madhavan Swaminathan, et al.
EMC 2011