A study on chemical exfoliation and structural and optical properties of two-dimensional layered titanium diselenide

2021 ◽  
Author(s):  
Ashish Kumar ◽  
Rohit Sharma ◽  
Sandeep Yadav ◽  
Sanjay Kumar Swami ◽  
Reena Kumari ◽  
...  
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Bandgap Engineering ◽  
Structural And Optical Properties ◽  
Chemical Exfoliation ◽  
Rapid Characterization ◽  
Synthesis Methodology

Titanium diselenide (TiSe2) is the least studied member of the transition metal dichalcogenide family due to a lack of readily available synthesis methodology, controlled bandgap engineering, and rapid characterization of layers.

scholarly journals Characterization of Layer Number of Two-Dimensional Transition Metal Diselenide Semiconducting Devices Using Si-Peak Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Xian Zhang
Keyword(s):  
Raman Spectroscopy ◽  
Optical Properties ◽  
Transition Metal ◽  
Nondestructive Method ◽  
Two Dimensional ◽  
Bandgap Engineering ◽  
Layer Number ◽  
Ambipolar Behavior ◽  
Molybdenum Diselenide

Atomically thin materials such as semiconducting transition metal diselenide materials, like molybdenum diselenide (MoSe2) and tungsten diselenide (WSe2), have received intensive interests in recent years due to their unique electronic structure, bandgap engineering, ambipolar behavior, and optical properties and have motivated investigations for the next-generation semiconducting electronic devices. In this work, we show a nondestructive method of characterizing the layer number of two-dimensional (2-D) MoSe2 and WSe2 including single- and few-layer materials by Raman spectroscopy. The related photoluminescence properties are also studied as a reference. Although Raman spectroscopy is a powerful tool for determining the layer number of 2-D materials such as graphene and molybdenum disulfide (MoS2), there have been difficulties in precisely characterizing the layer number for MoSe2 and WSe2 by Raman spectroscopy due to the uncertain shifts during the Raman measurement process and the lack of multiple separated Raman peaks in MoSe2 and WSe2 for referencing. We then compared the normalized Si peak with MoSe2 and WSe2 and successfully identified the layer number of MoSe2 and WSe2. Similar to graphene and MoS2, the sample layer number is found to modify their optical properties up to 4 layers.

scholarly journals Towards the evaluation of defects in MoS2 using cryogenic photoluminescence spectroscopy

Nanoscale ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 3019-3028 ◽  
Author(s):  
Tim Verhagen ◽  
Valentino L. P. Guerra ◽  
Golam Haider ◽  
Martin Kalbac ◽  
Jana Vejpravova
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Photoluminescence Spectroscopy ◽  
Two Dimensional ◽  
Electronic And Optical Properties ◽  
Metal Dichalcogenides

Electronic and optical properties of two-dimensional transition metal dichalcogenides are strongly influenced by defects. Cryogenic photoluminescence spectroscopy is a superb tool for characterization of the nature and density of these defects.

scholarly journals MoS2/MX2 heterobilayers: bandgap engineering via tensile strain or external electrical field

Nanoscale ◽  
2014 ◽  
Vol 6 (5) ◽  
pp. 2879-2886 ◽  
Author(s):  
Ning Lu ◽  
Hongyan Guo ◽  
Lei Li ◽  
Jun Dai ◽  
Lu Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
First Principles ◽  
Tensile Strain ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Bandgap Engineering ◽  
Electrical Field ◽  
Electronic And Magnetic Properties ◽  
External Electrical Field

We have performed a comprehensive first-principles study of the electronic and magnetic properties of two-dimensional (2D) transition-metal dichalcogenide (TMD) heterobilayers MX2/MoS2 (M = Mo, Cr, W, Fe, V; X = S, Se).

scholarly journals Visualization of Multifractal Superconductivity in a Two-Dimensional Transition Metal Dichalcogenide in the Weak-Disorder Regime

Nano Letters ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 5111-5118 ◽  
Author(s):  
Carmen Rubio-Verdú ◽  
Antonio M. Garcı́a-Garcı́a ◽  
Hyejin Ryu ◽  
Deung-Jang Choi ◽  
Javier Zaldı́var ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Weak Disorder
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