Controlled synthesis of high-quality crystals of monolayer MoS2 for nanoelectronic device application

Yang, Xubo; Li, Qiang; Hu, Guofeng; Wang, Zegao; Yang, Zhenyu; Liu, Xingqiang; Dong, Mingdong; Pan, Caofeng

doi:10.1007/s40843-016-0130-1

Cited by 57 publications

(52 citation statements)

References 35 publications

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“…Graphene has mobility as high as 10 5 cm 2 V −1 s −1 , but it is gapless, so on/off ratio of FET with graphene as channel is always low although many modifications such as narrowing into nanoribbons and nitrogen doping have been tried [3,[6][7][8][9][10][11][12][13][14][15]. Subsequently, monolayer MoS2 exhibits significant indirect-to-direct band structure transition [16], but its highest mobility is as low as 200-500 cm 2 V −1 s −1 [4,17,18], which is much lower than that of classical semiconductors such as silicon (1,400 cm 2 V −1 s −1 ), and InP (5,400 cm 2 V −1 s −1 ). Recently, black phosphorus (BP) was found to have both more suitable bandgap and higher mobility (1000 cm 2 V −1 s −1 ) than monolayer MoS2, showing promising potentials as high-performance 2D channel material [2,[19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

A promising two-dimensional channel material: monolayer antimonide phosphorus

et al. 2016

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Section: Introductionmentioning

confidence: 99%

A promising two-dimensional channel material: monolayer antimonide phosphorus

et al. 2016

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“…High quality, large-area and single-layer MoS 2 can be fabricated by chemical vapor deposition (CVD) [5][6], but the grain boundary (GB) is inevitable and difficult to be identified. GBs affect the electron transfer process, and degrade the electrical and mechanical performances of MoS 2 , which limit the application of MoS 2 [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Optical visualization of MoS2 grain boundaries by gold deposition

Sun

Zheng

2018

Sci. China Mater.

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The grain boundaries (GBs) in continuous films or domains of MoS 2 are vital to its optical and electrical properties. Almost all previous approaches for GBs visualization are based on microscopy and spectroscopy and only effective for domains with less than several micrometers in size. Here we report a simple method for the visualization of large GBs in MoS 2 surface by optical microscope. Gold was deposited on the MoS 2 grown by chemical vapor deposition, and then the GBs could be observed by optical microscope. Upon gold deposition on MoS 2 , the entire GBs of large-area MoS 2 were clearly visualized using this method. To verify the result, the GBs were also characterized via scanning electron microscopy, transmission electron microscopy and atomic force microscopy. It showed the small particles of gold were clustered together on GBs, which had a larger binding energy than the inner regions. The method is universal and allows for the nondestructive identification of the GBs in any two dimensional materials with large area.

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“…Molybdenum disulfide (MoS 2 ), an earth-abundant and high activity material, has attracted extensive attention as an alternative to replace noble electrocatalysts in the HER [15][16][17][18]. MoS 2 has a hexagonally layered packed structure, consisting of a single layer of Mo between two sulfur layers in a trigonal prismatic arrangement.…”

Section: Introductionmentioning

confidence: 99%

Defective MoS2 electrocatalyst for highly efficient hydrogen evolution through a simple ball-milling method

Zhang

et al. 2017

Sci. China Mater.

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Molybdenum disulfide (MoS 2 ) has attracted extensive attention as an alternative to replace noble electrocatalysts in the hydrogen evolution reaction (HER). Here, we highlight an efficient and straightforward ball milling method, using nanoscale Cu powders as reductant to reduce MoS 2 engineering S-vacancies into MoS 2 surfaces, to fabricate a defectrich MoS 2 material (DR-MoS 2 ). The micron-sized DR-MoS 2 catalysts exhibit significantly enhanced catalytic activity for HER with an overpotential (at 10 mA cm −2 ) of 176 mV in acidic media and 189 mV in basic media, surpassing most of Mo-based catalysts previously reported, especially in basic solution. Meanwhile stability tests confirm the outstanding durability of DR-MoS 2 catalysts in both acid and basic electrolytes. This work not only opens a new pathway to implant defects to MoS 2 , but also provides low-cost alternative for efficient electrocatalytic production of hydrogen in both alkaline and acidic environments.

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Controlled synthesis of high-quality crystals of monolayer MoS2 for nanoelectronic device application

Cited by 57 publications

References 35 publications

A promising two-dimensional channel material: monolayer antimonide phosphorus

A promising two-dimensional channel material: monolayer antimonide phosphorus

Optical visualization of MoS2 grain boundaries by gold deposition

Defective MoS2 electrocatalyst for highly efficient hydrogen evolution through a simple ball-milling method

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