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Atomically Flat, 2D Edge-Directed Self-Assembly of Block Copolymers
Advanced Materials ( IF 27.4 ) Pub Date : 2022-10-27 , DOI: 10.1002/adma.202207338
Jang Hwan Kim 1, 2 , Hyeon U Jeong 3 , Hye-In Yeom 4 , Kyu Hyo Han 1, 2 , Geon Gug Yang 1, 2 , Hee Jae Choi 1, 2 , Jong Min Kim 4 , Sang-Hee Ko Park 4 , Hyeong Min Jin 5 , Jaeup U Kim 3 , Sang Ouk Kim 1, 2
Affiliation  

Nanoscale shape engineering is an essential requirement for the practical use of 2D materials, aiming at precisely customizing optimal structures and properties. In this work, sub-10-nm-scale block copolymer (BCP) self-assembled nanopatterns finely aligned along the atomic edge of 2D flakes, including graphene, MoS2, and h-BN, are exploited for reliable nanopatterning of 2D materials. The underlying mechanism for the alignment of the self-assembled nanodomains is elucidated based on the wetting layer alternation of the BCP film in the presence of intermediate 2D flakes. The resultant highly aligned nanocylinder templates with remarkably low levels of line edge roughness (LER) and line-width roughness (LWR) yield a sub-10-nm-wide graphene nanoribbon (GNR) array with noticeable switching characteristics (on-to-off ratio up to ≈6 × 104).

中文翻译:

嵌段共聚物的原子平面二维边向自组装

纳米级形状工程是二维材料实际使用的基本要求,旨在精确定制最佳结构和性能。在这项工作中,亚 10 纳米级嵌段共聚物 (BCP) 自组装纳米图案沿着二维薄片的原子边缘精细排列,包括石墨烯、MoS 2h-BN,用于可靠的二维材料纳米图案化。基于中间 2D 薄片存在下 BCP 膜的润湿层交替,阐明了自组装纳米域排列的潜在机制。由此产生的高度对齐的纳米圆柱模板具有非常低的线边缘粗糙度 (LER) 和线宽粗糙度 (LWR),可产生亚 10 纳米宽的石墨烯纳米带 (GNR) 阵列,具有明显的开关特性(开到关)比率高达≈6×10 4)。
更新日期:2022-10-27
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