Grains and grain boundaries in highly crystalline monolayer molybdenum disulphide.

By Arend M. van der Zande, Pinshane Y. Huang, Daniel A. Chenet, Timothy C. Berkelbach, Y. You, Gwan‐Hyoung Lee, T. Heinz, David R. Reichman, D. Muller, James C. Hone. Nature Materials, 2013

2,038 citations recorded by the source corpus.

Recent progress in large-area synthesis of monolayer molybdenum disulphide, a new two-dimensional direct-bandgap semiconductor, is paving the way for applications in atomically thin electronics. Little is known, however, about the microstructure of this material. Here we have refined chemical vapour deposition synthesis to grow highly crystalline islands of monolayer molybdenum disulphide up to 120 μm in size with optical and electrical properties comparable or superior to exfoliated samples. Using transmission electron microscopy, we correlate lattice orientation, edge morphology and crystallinity with island shape to demonstrate that triangular islands are single crystals. The crystals merge to form faceted tilt and mirror twin boundaries that are stitched together by lines of 8- and 4-membered rings. Density functional theory reveals localized mid-gap states arising from these 8-4 defects. We find that mirror twin boundaries cause strong photoluminescence quenching whereas tilt boundaries cause strong enhancement. Meanwhile, mirror twin boundaries slightly increase the measured in-plane electrical conductivity, whereas tilt boundaries slightly decrease the conductivity.

Subfields: Biomedical Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/c79ae96f8eb1f0974953402350075e8d8d9eff3b

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. A. Castellanos-Gómez
2. Herre S. J. van der Zant
3. Yu Huang
4. G. Steele
5. Xiangfeng Duan
6. M. Buscema
7. Zhenhua Ni
8. Yuan Liu

In Materials Chemistry

1. A. Castellanos-Gómez
2. G. Steele
3. Herre S. J. van der Zant
4. Yu Huang
5. M. Buscema
6. Xiangfeng Duan
7. Zhangting Wu
8. Vibhor Singh

Citations in the corpus

• Intrinsic electrical transport and performance projections of synthetic monolayer MoS2 devices (2016, background): “Supp-7 D. Brief History of Electrical Results Reported for Synthetic Monolayer MoS2 Figure S9. Historical plot of 1L CVD MoS2 devices with highest reported drive currents and reported mobility values [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]. The type of mobility v”
• Spectroscopic investigation of defects in two-dimensional materials (2016, background): “The defects in the mirror boundary are molybdenum rich, which would n-dope the boundary; whereas the defects in the tilt boundary are sulphur rich, which would p-dope the boundary [69].”