二硫化钼MoS2的制备和应用

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Characterization Techniques
TEM of few layer molybdenum disulfide. (B) Low-resolution TEM images of flakes of MoS2. (E)High-resolution TEM images of MoS2 monolayers. (Insets) Fast Fourier transforms of the images. (H) Butterworth-filtered images of sections of the images in (E).
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Scotch tape method
1. Repeat peeling off MoS2 to find thin flakes 2. Transfer these thin MoS2 flakes onto the SiO2/Si substrate 3. Repeat peeling the MoS2 on Scotch tape 4. Observe light green color of MoS2 flakes on the Scotch tape
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Wet chemical method synthesis 2D MoS2@oleylamine nanosheet
Scheme of the apparatus for the synthesis of 2D MS2@oleylamine nanosheets by thermal decomposition of thio-salts of Mo and W in the presence of oleylamine
Liu K. et al. Nano Lett. 2012, 12, 1538.
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Micromechanical exfoliation
Disadvantage Advantage
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Solution exfoliation
Schematic description of the main solution exfoliation mechanisms Valeria Nicolosi, et al. Science, 2013, 340(6139)
Illustration of a back-gated MoS2 memory FET created by a simple plasma treatment
It is estimated that these 4 data states can be well discernible within 10 years of the initial applications of programming VG signals
Teng Liu. et al. Adma. 2014, 26, 3433
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Excellent Electrochemical performance for Lithium and Sodium storage
Capacity/mAhg-1
High rate performance of such a composite
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Synthetic methods
Micromechanical exfoliation Top-down
Solution exfoliation
MoS2 Bottom-up CVD Wet chemical method Hydrothermal synthesis
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Top-down methods
The Synthesis Methods and Applications of MoS2
Wei Gan, Weiyu Xu, Xiaozhi Su, Zhen Yu, Hu Jin, Wei Li, Xin Wang, Yi Ren, Jiafang Xie, Yancai Yao, Zhuoneng Bi
Field-effect transistors
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Drug Delivery with PEGylated MoS2 Nano-sheets
The extraordinary specific surface ratio of MoS2 nanosheets resulted from their atomically-thin 2D structure enables highly efficient loading of therapeutic molecules
Wei Gan, Weiyu Xu
PPT prepare
Weiyu Xu Presenter
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About the presentation
Introduction
Synthesis methods
Applications
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Introduction
High on/off ratios ~ about 108 Excellent optical properties Sizeable direct band gap ~1.9 eV High 2D elastic moduli ∼170 N/m Electron effective mobility ranging from 1 to 480 cm2 /V· s
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Bottom-up methods
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Hydrothermal synthesis
Synthesis procedure of hydrothermal method
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Illustration of the formation process
Lin Ma, et al. Materials Letters 132 (2014) 291 –294
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About the presentation
Wei Gan, Xiaozhi Su, Zhen Yu, Hu Jin, Wei Li, Xin Wang, Yi Ren, Jiafang Xie, Yancai Yao, Zhuoneng Bi
Literature collect and data analysis
Claudia Altavilla. Et al. Chem Mater 2011, 23 (17), 3879-3885
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Characterization Techniques
Claudia Altavilla. Et al. Chem Mater 2011, 23 (17), 3879-3885
Mikai Chen. et al. ACS Nano, 2014, 8 (4),4023
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References
1. Zhang, J.; Yu, H.; Chen, W.; Tian, X.; Liu, D.; Cheng, M.; Xie, G.; Yang, W.; Yang, R.; Bai, X.; Shi, D.; Zhang, G., Scalable Growth of High-Quality Polycrystalline MoS2 Monolayers on SiO2with Tunable Grain Sizes. ACS nano 2014. 2.Liu, K.; Yan, Q.; Chen, M.; Fan, W.; Sun, Y.; Suh, J.; Fu, D.; Lee, S.; Zhou, J.; Tongay, S.; Ji, J.; Neaton, J. B.; Wu, J., Elastic Properties of Chemical-Vapor-Deposited Monolayer MoS2, WS2, and Their Bilayer Heterostructures. Nano letters 2014, 14 (9), 5097-103. 3.Ji, Q.; Zhang, Y.; Zhang, Y.; Liu, Z., Chemical vapour deposition of group-VIB metal dichalcogenide monolayers: engineered substrates from amorphous to single crystalline. Chemical Society reviews 2014. 4. Nicolosi V, Chhowalla M, Kanatzidis M G, et al. Liquid exfoliation of layered materials[J]. Science, 2013, 340(6139). 5.Ma, L.; Xu, L.-M.; Zhou, X.-P.; Xu, X.-Y., Biopolymer-assisted hydrothermal synthesis of flower-like MoS2 microspheres and their supercapacitive properties. Mater Lett 2014, 132, 291-294. 6. Gong, Y.; Lin, J.; Wang, X.; Shi, G.; Lei, S.; Lin, Z.; Zou, X.; Ye, G.; Vajtai, R.; Yakobson, B. I.; Terrones, H.; Terrones, M.; Tay, B. K.; Lou, J.; Pantelides, S. T.; Liu, Z.; Zhou, W.; Ajayan, P. M., Vertical and inplane heterostructures from WS/MoS monolayers. Nature materials 2014. 7. Hong, X.; Kim, J.; Shi, S. F.; Zhang, Y.; Jin, C.; Sun, Y.; Tongay, S.; Wu, J.; Zhang, Y.; Wang, F., Ultrafast charge transfer in atomically thin MoS2/WS2 heterostructures. Nature nanotechnology 2014, 9 (9), 682-6. 8. Late, D. J.; Huang, Y. K.; Liu, B.; Acharya, J.; Shirodkar, S. N.; Luo, J.; Yan, A.; Charles, D.; Waghmare, U. V.; Dravid, V. P.; Rao, C. N., Sensing behavior of atomically thin-layered MoS2 transistors. ACS nano 2013, 7 (6), 4879-91 22
Changbao Zhu. et al. Angew. Chem. 2014, 53, 2152
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Electrocatalysis of MoS2 for Hydrogen Evolution Reaction
Yifei Yu. Nano Lett. 2014, 14, 553
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Multibit Data Storage States Formed in Plasma-Treated MoS2 Transistors
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CVD
Kai Liu. et al. Nano Lett. 2014, 14, 5097 −5103
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Applications
Biomedical
Memory devices Photocatalytics MoS2 Electrode Gas sensors
Energy Storage
Phototransistors