# Fileset

[SM.pdf](https://mdr.nims.go.jp/filesets/71c5dcd0-9802-4361-ae6c-6dbbd5518d92/download)

## Creator

[Akihiro Ohtake](https://orcid.org/0000-0002-3519-4613), [Jun Nara](https://orcid.org/0000-0002-0486-2981), [Yoshiki Sakuma](https://orcid.org/0000-0001-6804-7217)

## Rights

[Creative Commons BY Attribution 4.0 International](https://creativecommons.org/licenses/by/4.0/)

## Other metadata

[Epitaxial configuration of unidirectionally aligned MoS2 monolayer on sapphire](https://mdr.nims.go.jp/datasets/c7a13968-c1ba-498d-a3d0-9a87b9843d82)

## Fulltext

SMSupplementary materials Epitaxial configuration of unidirectionally-aligned MoS2 monolayer on sapphire   Akihiro Ohtake*,†, Jun Nara†, and Yoshiki Sakuma†   †National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan  Corresponding Author: OHTAKE.Akihiro@nims.go.jp                   Figure S1. Representative AFM images measured from randomly selected areas of the ML-MoS2 sample grown on the sapphire (0001) substrate at 975˚C for 60 min.  The image dimensions are 2 x 2 µm2.  It is clearly seen that the MoS2 ML is continuous and that the nucleation of second-layer MoS2 islands is very limited.                  Figure S2. Raman spectra taken from five locations across the ML-MoS2 sample grown on the sapphire (0001) substrate at 975˚C for 60 min. The difference in peak positions for the E12g and A1g modes are less than 19 cm-1, which provides evidence for the 1 ML-thick MoS2 film [1].   [1] C. Lee, H. Yan, L.E. Brus, T.F. Heinz, J. Hone, and S. Ryu, Anomalous Lattice Vibrations of Single- and Few-Layer MoS2, ACS Nano, 4, 2695-2700 (2010).                            Figure S3. (a) Schematic drawing of the setup for XRD rocking curve measurements.  (b) Schematic illustrations of sapphire substrate with miscut angles of ~0.2˚ along the [1-100] (A), [-1100] (B) and [11-20] (C) directions.  (c) Measured XRD rocking curves.  The actual miscut angles are c/m =-0.2485˚ (a), c/m =+0.199˚ (b), and c/a =+0.1586˚ (c).  The incidental miscut angles for the orthogonal directions are negligible; 0.0435˚ (a), 0.0011˚ (b), and 0.0200˚ (c).                Figure S4. Schematic illustrations of 0˚ and 90˚ domains of ML-MoS2 on the sapphire substrate.  In the 0˚ domain, the MoS2(3x3) supercell is lattice-matched with the Al2O3(2x2) cell (lattice mismatch =-0.42 %).  In the 90˚ domain, MoS2(5x5) cell is nearly lattice-matched to Al2O3(2√3x2√3)-R30˚ cell (lattice mismatch = -4.18 %).