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나노 구조 물리 연구단
나노구조물리 연구단
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Charge Transport in Polycrystalline Graphene: Challenges and Opportunities

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Title
Charge Transport in Polycrystalline Graphene: Challenges and Opportunities
Author(s)
Cummings, A.W.; Dinh Loc Duong; Van Luan Nguyen; Van Tuan, D.; Kotakoski, J.; Barrios Vargas, J.E.; Young Hee Lee; Roche, S.
Publication Date
2014-08
Journal
ADVANCED MATERIALS, v.26, no.30, pp.5079 - 5094
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Graphene has attracted signifi cant interest both for exploring fundamental science and for a wide range of technological applications. Chemical vapor deposition (CVD) is currently the only working approach to grow graphene at wafer scale, which is required for industrial applications. Unfortunately, CVD graphene is intrinsically polycrystalline, with pristine graphene grains stitched together by disordered grain boundaries, which can be either a blessing or a curse. On the one hand, grain boundaries are expected to degrade the electrical and mechanical properties of polycrystalline graphene, rendering the material undesirable for many applications. On the other hand, they exhibit an increased chemical reactivity, suggesting their potential application to sensing or as templates for synthesis of one-dimensional materials. Therefore, it is important to gain a deeper understanding of the structure and properties of graphene grain boundaries. Here, we review experimental progress on identifi cation and electrical and chemical characterization of graphene grain boundaries. We use numerical simulations and transport measurements to demonstrate that electrical properties and chemical modifi cation of graphene grain boundaries are strongly correlated. This not only provides guidelines for the improvement of graphene devices, but also opens a new research area of engineering graphene grain boundaries for highly sensitive electro-biochemical devices.
URI
https://pr.ibs.re.kr/handle/8788114/952
ISSN
0935-9648
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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