Observation of Bragg polaritons in monolayer tungsten disulphide

Nano Research ◽  
2021 ◽  
Author(s):  
Xu Wang ◽  
Lishu Wu ◽  
Xuewen Zhang ◽  
Weihuang Yang ◽  
Zheng Sun ◽  
...  
Keyword(s):  
Tungsten Disulphide

Tungsten Disulphide Nanosheets for High-Performance Chemiresistive Ammonia Gas Sensor

2019 ◽  
Vol 19 (24) ◽  
pp. 11767-11774 ◽  
Author(s):  
Neha Sakhuja ◽  
Ravindra Kumar Jha ◽  
Navakanta Bhat
Keyword(s):  
Gas Sensor ◽  
High Performance ◽  
Ammonia Gas ◽  
Tungsten Disulphide

Performance Evaluation of Silicon-Transition Metal Dichalcogenides Heterostructure Based Steep Subthreshold Slope-Field Effect Transistor Using Non-Equilibrium Green’s Function

2020 ◽  
Vol 18 (6) ◽  
pp. 468-476
Author(s):  
Prateek Kumar ◽  
Maneesha Gupta ◽  
Naveen Kumar ◽  
Marlon D. Cruz ◽  
Hemant Singh ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Molybdenum Disulphide ◽  
Short Channel ◽  
Tungsten Disulphide ◽  
Channel Effects ◽  
Effect Transistor

With technology invading nanometer regime performance of the Metal-Oxide-semiconductor Field Effect Transistor is largely hampered by short channel effects. Most of the simulation tools available do not include short channel effects and quantum effects in the analysis which raises doubt on their authenticity. Although researchers have tried to provide an alternative in the form of tunnel field-effect transistors, junction-less transistors, etc. but they all suffer from their own set of problems. Therefore, Metal-Oxide-Semiconductor Field-Effect Transistor remains the backbone of the VLSI industry. This work is dedicated to the design and study of the novel tub-type Metal-Oxide-Semiconductor Field-Effect Transistor. For simulation Non-Equilibrium Green’s Function is used as the primary model of simulation. The device is analyzed under different physical variations like work function, permittivity, and interface trap charge. This work uses Silicon-Molybdenum Disulphide heterojunction and Silicon-Tungsten Disulphide heterojunction as channel material. Results for both the heterojunctions are compared. It was analyzed that Silicon-Molybdenum Disulphide heterojunction provides better linearity and Silicon-Tungsten Disulphide heterojunction provides better switching speed than conventional Metal-Oxide-Semiconductor Field-Effect Transistor.

Tungsten disulphide based all fiber Q-switching cylindrical-vector beam generation

2015 ◽  
Vol 107 (19) ◽  
pp. 191108 ◽  
Author(s):  
J. Lin ◽  
K. Yan ◽  
Y. Zhou ◽  
L. X. Xu ◽  
C. Gu ◽  
...  
Keyword(s):  
Beam Generation ◽  
Tungsten Disulphide ◽  
Vector Beam ◽  
Q Switching ◽  
Cylindrical Vector Beam

Optimization of Tungsten Disulfide/Polypyrrole Composite as Photocatalyst in Sunlight-Asissted Photodegradation of Methylene Blue in Aqueous Solution

2021 ◽  
Author(s):  
Siti Nor Atika Baharin ◽  
Nurul Hafawati Hashim ◽  
Izyan Najwa Mohd Norsham ◽  
Syed Shahabuddin ◽  
Kavirajaa Pandian Sambasevam
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Contact Time ◽  
Oxidative Polymerization ◽  
Effective Parameters ◽  
X Ray Diffraction ◽  
Sunlight Irradiation ◽  
Initial Concentration ◽  
Tungsten Disulphide ◽  
Polypyrrole Composite

Abstract The present study highlights the sunlight-assisted photodegradation of methylene blue (MB) using tungsten disulphide/polypyrrole (WS2/PPy) composite as a photocatalyst. WS2/PPy was prepared via oxidative polymerization using ferric chloride (FeCl3) as an oxidant. Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM) measurement were used to ensure the physicochemical properties of WS2/PPy. The photocatalytic efficiencies of the photocatalysts were examined by degrading methylene blue (MB) under sunlight irradiation. The results showed that the degradation efficiency of WS2/PPy was higher than the pristine PPy Several optimizations such as effect of the concentration, contact time, photocatalyst dosage and initial concentration were investigated. The results revealed that, under optimum condition of pH 3, 100 mg photocatalyst dosage, 10 ppm MB initial concentration within 180 minutes contact time, were the most effective parameters, that produced 96.15% of sunlight-assisted photodegradation in aqueous solution of MB.

Tungsten disulphide for ultrashort pulse generation in all-fiber lasers

Nanoscale ◽  
2017 ◽  
Vol 9 (18) ◽  
pp. 5806-5811 ◽  
Author(s):  
Wenjun Liu ◽  
Lihui Pang ◽  
Hainian Han ◽  
Ke Bi ◽  
Ming Lei ◽  
...  
Keyword(s):  
Ultrashort Pulse ◽  
Fiber Lasers ◽  
Pulse Generation ◽  
Tungsten Disulphide ◽  
Ultrashort Pulse Generation

scholarly journals Probing excitonic dark states in single-layer tungsten disulphide

Nature ◽  
2014 ◽  
Vol 513 (7517) ◽  
pp. 214-218 ◽  
Author(s):  
Ziliang Ye ◽  
Ting Cao ◽  
Kevin O’Brien ◽  
Hanyu Zhu ◽  
Xiaobo Yin ◽  
...  
Keyword(s):  
Single Layer ◽  
Tungsten Disulphide

scholarly journals Modelling of adsorption and intercalation of hydrogen on/into tungsten disulphide multilayers and multiwall nanotubes

2018 ◽  
Vol 20 (17) ◽  
pp. 12061-12074 ◽  
Author(s):  
José I. Martínez ◽  
Alex Laikhtman ◽  
Hoi Ri Moon ◽  
Alla Zak ◽  
Julio A. Alonso
Keyword(s):  
First Principles ◽  
First Principles Calculations ◽  
Tungsten Disulphide ◽  
Multiwall Nanotubes

First-principles calculations, supported by new experimental evidences, have been used to clarify the different processes and mechanisms related to the interaction of hydrogen with WS2 nanomaterials.

scholarly journals Chemical vapour deposition of chromium-doped tungsten disulphide thin films on glass and steel substrates from molecular precursors

2018 ◽  
Vol 6 (35) ◽  
pp. 9537-9544 ◽  
Author(s):  
Ghulam Murtaza ◽  
Sai P. Venkateswaran ◽  
Andrew G. Thomas ◽  
Paul O'Brien ◽  
David J. Lewis
Keyword(s):  
Thin Films ◽  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Molecular Precursors ◽  
Tungsten Disulphide ◽  
Polycrystalline Thin Films ◽  
Steel Substrates

Polycrystalline thin films of chromium doped tungsten disulphide (WS2) have been deposited onto glass and steel substrates by Aerosol-Assisted Chemical Vapour Deposition (AACVD) at 450 °C.

Control of coherently-coupled exciton-polaritons in monolayer tungsten disulphide (Conference Presentation)

2018 ◽  
Author(s):  
Xiaoze Liu ◽  
Wei Bao ◽  
Quanwei Li ◽  
Chad Ropp ◽  
Yuan Wang ◽  
...  
Keyword(s):  
Tungsten Disulphide ◽  
Exciton Polaritons
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