Control and characterization of individual grains and grain boundaries in graphene grown by chemical vapour deposition.

By Qingkai Yu, L. Jauregui, Wei Wu, R. Colby, Jifa Tian, Z. Su, H. Cao, Zhihong Liu, Deepak Pandey, Dongguang Wei and 7 more. Nature Materials, 2010

1,420 citations recorded by the source corpus.

The strong interest in graphene has motivated the scalable production of high-quality graphene and graphene devices. As the large-scale graphene films synthesized so far are typically polycrystalline, it is important to characterize and control grain boundaries, generally believed to degrade graphene quality. Here we study single-crystal graphene grains synthesized by ambient chemical vapour deposition on polycrystalline Cu, and show how individual boundaries between coalescing grains affect graphene's electronic properties. The graphene grains show no definite epitaxial relationship with the Cu substrate, and can cross Cu grain boundaries. The edges of these grains are found to be predominantly parallel to zigzag directions. We show that grain boundaries give a significant Raman 'D' peak, impede electrical transport, and induce prominent weak localization indicative of intervalley scattering in graphene. Finally, we demonstrate an approach using pre-patterned growth seeds to control graphene nucleation, opening a route towards scalable fabrication of single-crystal graphene devices without grain boundaries.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/3631f2c17304271b5b6a89c908c81b70bafaf60b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Biomedical Engineering

1. Hui‐Ming Cheng
2. Q. Fu
3. Zhenhua Ni
4. W. Ren
5. Zhangting Wu
6. Zhiyong Zhang
7. Lianmao Peng
8. A. Di Bartolomeo

In Electrical and Electronic Engineering

1. Hui‐Ming Cheng
2. W. Ren
3. X. Bao
4. S. Dai
5. Zhenhua Ni
6. Zhangting Wu
7. Zhiyong Zhang
8. Lianmao Peng

In Materials Chemistry

1. Hui‐Ming Cheng
2. W. Ren
3. Zhangting Wu
4. X. Bao
5. Q. Fu
6. S. Dai
7. Zhenhua Ni
8. S. Smirnov

Citations in the corpus

• Spectroscopic investigation of defects in two-dimensional materials (2016, background): “Figure 6D-i shows the Raman image of two CVD grown graphene domains with a GB, where a pronounced ID is observed at the GB between two coalesced grains [109].”
• Large scale atmospheric pressure chemical vapor deposition of graphene (2013, background): “[25] Yu Q, Jauregui LA, Wu W, Colby R, Tian J, Su Z, et al.”