Journal
MACROMOLECULES
Volume 51, Issue 4, Pages 1418-1426Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.7b02645
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Funding
- Nano-Material Technology Development Program through the NRF - MSIP [2016M3A7B4905613]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning (MSIP) [2017R1A2B4012377, 2014R1A2A1A11054430]
- Global Frontier Hybrid Interface Materials (GFHIM) [2013M3A6B1078874]
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Laser photothermal annealing is emerging as a promising strategy for directed self-assembly of block copolymers along with its unique advantages, such as area selectivity, solvent-free ultrafast process, and highly oriented nanopattern formation without substrate prepatterning. We investigate laser-induced highly aligned lamellar and cylindrical self-assembled nanostructure formation by means of simulation as well as experiment. Self-assembled surface-perpendicular lamellar or surface-parallel cylindrical nanodomains in PS-b-PMMA thin films could be aligned by lateral steady scan of focused laser irradiation to attain excellent long-range order over 10 mu m length scale. For the systematic understanding of the experimental observation, quasi-static simulation employing successive self-consistent field theory calculation has been developed. Miniaturized simulations of experimental systems could confirm a strong tendency for lamellar domains to grow in the direction of laser scanning. Cylindrical self-assembled domains exhibit similar behaviors provided that the surface prefers one block and the block copolymer film thickness is moderate.
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