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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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A Facile Route for Patterned Growth of MetalInsulator Carbon Lateral Junction through One-Pot Synthesis

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Title
A Facile Route for Patterned Growth of MetalInsulator Carbon Lateral Junction through One-Pot Synthesis
Author
Kim, Kwang S.Park, BeomjinPark, JaesungHong, Byung HeeKim, Jin KonHan, Sang WooAhn, Jong HyunLee, ZonghoonHwang, ChanyongNovoselov, Konstantin SLee, Tae GeolHyun, SeungMishchenko, ArtemSeoung Ki LeeHuh, SungJeon, GumhyeByun, JinseokChae, Dong HunPark, Hyo JuYu, Seong UkKim, Yong JinSon, Jin Gyeong
Issue Date
2015-08
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.9, no.88, pp.8352 - 8360
Abstract
Precise graphene patterning is of critical importance for tailor-made and sophisticated two-dimensional nanoelectronic and optical devices. However, graphene-based heterostructures have been grown by delicate multistep chemical vapor deposition methods, limiting preparation of versatile heterostructures. Here, we report one-pot synthesis of graphene/amorphous carbon (a-C) heterostructures from a solid source of polystyrene via selective photo-cross-linking process. Graphene is successfully grown from neat polystyrene regions, while patterned cross-linked polystyrene regions turn into a-C because of a large difference in their thermal stability. Since the electrical resistance of a-C is at least 2 orders of magnitude higher than that for graphene, the charge transport in graphene/a-C heterostructure occurs through the graphene region. Measurement of the quantum Hall effect in graphene/a-C lateral heterostructures clearly confirms the reliable quality of graphene and well-defined graphene/a-C interface. The direct synthesis of patterned graphene from polymer pattern could be further exploited to prepare versatile heterostructures.
URI
https://scholarworks.unist.ac.kr/handle/201301/18079
URL
http://pubs.acs.org/doi/abs/10.1021/acsnano.5b03037
DOI
10.1021/acsnano.5b03037
ISSN
1936-0851
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