Choi, Ki-In Kim, Tae-Ho Lee, Yeonhee Kim, Hyeri Lee, Hoyeon Yuan, Guangcui Satija, Sushil K. Choi, Jae-Hak Ahn, Hyungju Koo, Jaseung 2024-01-19T23:32:52Z 2024-01-19T23:32:52Z 2021-09-03 2018-01-30 0743-7463 https://pubs.kist.re.kr/handle/201004/121793 We have studied an orientation structure of self-assembled block copolymers (dPS-b-PMMA) of deuterated polystyrene (dPS) and poly(methyl methacrylate) (PMMA) confined between graphene oxide (GO) surfaces. The results of combination techniques, such as neutron reflectivity, time-of-flight secondary-ion mass spectrometry, grazing-incidence small-angle X-ray scattering, and scanning electron microscopy, show that self-assembled domains of the block copolymers in thin films near the GO sheets are oriented, perpendicular to the surface of the GO monolayers, in contrast to the horizontal lamellar structure of the copolymer thin film in the absence of the GO monolayers. This is due to the amphiphilic nature of the GO, which leads to a nonpreferential interaction of both dPS and PMMA blocks. Double-sided confinement with the GO monolayers further extends the ordering behavior of the dPS-b-PMMA thin films. Continuous vertical orientation of the block copolymer thin. films is also obtained in the presence of alternating GO layers within thick copolymer films. English AMER CHEMICAL SOC MONTE-CARLO SIMULATIONS BARRIER PROPERTIES BLOCK-COPOLYMERS SURFACE FILMS ENERGY CAST Perpendicular Orientation of Diblock Copolymers Induced by Confinement between Graphene Oxide Sheets Article 10.1021/acs.langmuir.7b03991 1 LANGMUIR, v.34, no.4, pp.1681 - 1690 LANGMUIR 34 4 1681 1690 scie scopus 000424070400050 2-s2.0-85041447399 Chemistry, Multidisciplinary Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article MONTE-CARLO SIMULATIONS BARRIER PROPERTIES BLOCK-COPOLYMERS SURFACE FILMS ENERGY CAST