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다차원 탄소재료 연구단
다차원 탄소재료 연구단
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Synthesis of aligned symmetrical multifaceted monolayer hexagonal boron nitride single crystals on resolidified copper

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Title
Synthesis of aligned symmetrical multifaceted monolayer hexagonal boron nitride single crystals on resolidified copper
Author(s)
Roland Yingjie Tay; Hyo Ju Park; Gyeong Hee Ryu; Dunlin Tan; Siu Hon Tsang; Hongling Li; Wenwen Liu; Edwin Hong Tong Teo; Zonghoon Lee; Yeshayahu Lifshitz; Rodney S. Ruoff
Publication Date
2016-01
Journal
NANOSCALE, v.8, no.4, pp.2434 - 2444
Publisher
ROYAL SOC CHEMISTRY
Abstract
Atomically smooth hexagonal boron nitride (h-BN) films are considered as a nearly ideal dielectric interface for two-dimensional (2D) heterostructure devices. Reported mono-to few-layer 2D h-BN films, however, are mostly small grain-sized, polycrystalline and randomly oriented. Here we report the growth of centimetre-sized atomically thin h-BN films composed of aligned domains on resolidified Cu. The films consist of monolayer single crystalline triangular and hexagonal domains with size of up to similar to 10 mu m. The domains converge to symmetrical multifaceted shapes such as "butterfly" and " 6-apex-star" and exhibit similar to 75% grain alignment for over millimetre distances as verified through transmission electron microscopy. Scanning electron microscopy images reveal that these domains are aligned for over centimetre distances. Defect lines are generated along the grain boundaries of mirroring h-BN domains due to the two different polarities (BN and NB) and edges with the same termination. The observed triangular domains with truncated edges and alternatively hexagonal domains are in accordance with Wulff shapes that have minimum edge energy. This work provides an extensive study on the aligned growth of h-BN single crystals over large distances and highlights the obstacles that are needed to be overcome for a 2D material with a binary configuration. © The Royal Society of Chemistry 2016
URI
https://pr.ibs.re.kr/handle/8788114/2407
ISSN
2040-3364
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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