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Author

Lee, Zonghoon
Atomic-Scale Electron Microscopy (ASEM) Lab
Research Interests
  • Advanced Transmission Electron Microscopy (TEM/STEM), in Situ TEM, graphene, 2D materials, low-dimensional crystals, nanostructured materials

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High-angle tilt boundary graphene domain recrystallized from mobile hot-wire-assisted chemical vapor deposition system

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Title
High-angle tilt boundary graphene domain recrystallized from mobile hot-wire-assisted chemical vapor deposition system
Author
Lee, JinsupBaek, JinwookRyu, Gyeong HeeLee, Mi JinOh, SeranHong, Seul KiKim, Bo-HyunLee, Seok-HeeCho, Byung JinLee, ZonghoonJeon, Seokwoo
Keywords
graphene; recrystallization; high-angle tilt boundary; global domain; chemical vapor deposition
Issue Date
201408
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.14, no.8, pp.4352 - 4359
Abstract
Crystallization of materials has attracted research interest for a long time, and its mechanisms in three-dimensional materials have been well studied. However, crystallization of two-dimensional (2D) materials is yet to be challenged. Clarifying the dynamics underlying growth of 2D materials will provide the insight for the potential route to synthesize large and highly crystallized 2D domains with low defects. Here, we present the growth dynamics and recrystallization of 2D material graphene under a mobile hot-wire assisted chemical vapor deposition (MHW-CVD) system. Under local but sequential heating by MHW-CVD system, the initial nucleation of nanocrystalline graphenes, which was not extended into the growth stage due to the insufficient thermal energy, took a recrystallization and converted into a grand single crystal domain. During this process, the stitching-like healing of graphene was also observed. The local but sequential endowing thermal energy to nanocrystalline graphenes enabled us to simultaneously reveal the recrystallization and healing dynamics in graphene growth, which suggests an alternative route to synthesize a highly crystalline and large domain size graphene. Also, this recrystallization and healing of 2D nanocrystalline graphenes offers an interesting insight on the growth mechanism of 2D materials.
URI
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DOI
http://dx.doi.org/10.1021/nl5012323
ISSN
1530-6984
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