Aligned monolayer MoS2 ribbons growth on sapphire substrate via NaOH-assisted chemical vapor deposition

Aligned monolayer MoS2 ribbons growth on sapphire substrate via NaOH-assisted chemical vapor deposition

This study reports the growth of aligned monolayer molybdenum disulfide (MoS 2 ) ribbons on a sapphire substrate via NaOH-assisted chemical vapor deposition. The length of MoS 2 ribbon is up to 400 μm. The MoS 2 ribbon has excellent single crystal properties, a carrier mobility of {150 cm 2 V −1 s −...

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Bibliographic Details
Published in:Science China materials Vol. 63; no. 6; pp. 1065 - 1075
Main Authors: Hu, Shike, Li, Jing, Zhan, Xiaoyi, Wang, Shuang, Lei, Longbiao, Liang, Yijian, Kang, He, Zhang, Yanhui, Chen, Zhiying, Sui, Yanping, Jiang, Da, Yu, Guanghui, Peng, Songang, Jin, Zhi, Liu, Xinyu
Format: Journal Article
Language:English
Published: Beijing Science China Press 01-06-2020
Springer Nature B.V
Subjects:
Alignment
Carrier mobility
Chemical vapor deposition
Chemistry and Materials Science
Chemistry/Food Science
Growth models
Interlayers
Materials Science
Molybdenum
Molybdenum disulfide
Molybdenum oxides
Molybdenum trioxide
Monolayers
Sapphire
Single crystals
Sodium hydroxide
Sodium molybdate
Substrates
Van der Waals forces
MoS
aligned ribbons
step
vapor-liquid-solid
epitaxy
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Summary:This study reports the growth of aligned monolayer molybdenum disulfide (MoS 2 ) ribbons on a sapphire substrate via NaOH-assisted chemical vapor deposition. The length of MoS 2 ribbon is up to 400 μm. The MoS 2 ribbon has excellent single crystal properties, a carrier mobility of {150 cm 2 V −1 s −1 , and a optical response of 103 mA W −1 at a wavelength of 550 nm. The growth model of MoS 2 ribbons was given. NaOH reacts with MoO 3 to form sodium molybdate droplets, which increase the fluidity of the molybdenum source on the substrate, realizing the vapor–liquid–solid growth of MoS 2 on sapphire. The monolayer MoS 2 ribbons have two kinds of arrangements on the sapphire substrate, one is the oriented growth affected by the interlayer van der Waals force and the lattice, and the other is the aligned growth constrained by the sapphire step. Our results promote the basic research and device applications of MoS 2 , and introduce a new way of synthesizing other one dimensional (1D) and 2D nanostructures.
ISSN:2095-8226
2199-4501
DOI:10.1007/s40843-019-1265-9