A Revised Mechanism of Band Gap Evolution of TMDC Nanotubes and Its Application to Janus TMDC Nanotubes: Negative Electron and Hole Compressibility

2021 ◽  
Author(s):  
XiaoHan Wang ◽  
Yingchao Liu ◽  
JinLong Ren ◽  
KunPeng Dou ◽  
Xingqiang Shi ◽  
...  
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Quantum Confinement ◽  
Strain Effect ◽  
Transition Metal Dichalcogenide ◽  
Gap Size

It is widely accepted that quantum confinement and strain effect display opposite impacts on band gap size of spherical or tubular transition metal dichalcogenide (TMDC) nanostructures. However, our extensive ab...

Observation of quantum-confined exciton states in monolayer WS2 quantum dots by ultrafast spectroscopy

Nanoscale ◽  
2021 ◽  
Author(s):  
Shuwen Zheng ◽  
Lei Wang ◽  
Hai-yu Wang ◽  
chenyu Xu ◽  
Yang Luo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Transition Metal ◽  
Edge Effect ◽  
Quantum Confinement ◽  
Ultrafast Spectroscopy ◽  
Photophysical Properties ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Transition Metal Dichalcogenide ◽  
Fundamental Study

Monolayer transition metal dichalcogenide quantum dots (TMDC QDs) could exhibit unique photophysical properties, because of both lateral quantum confinement effect and edge effect. However, there is little fundamental study on...

Band gap modulation of transition-metal dichalcogenide MX 2 nanosheets by in-plane strain

2016 ◽  
Vol 84 ◽  
pp. 216-222 ◽  
Author(s):  
Xiangying Su ◽  
Weiwei Ju ◽  
Ruizhi Zhang ◽  
Chongfeng Guo ◽  
Yongliang Yong ◽  
...  
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Plane Strain ◽  
Transition Metal Dichalcogenide ◽  
Band Gap Modulation

scholarly journals Controllable Synthesis of Band-Gap-Tunable and Monolayer Transition-Metal Dichalcogenide Alloys

2014 ◽  
Vol 2 ◽  
Author(s):  
Sheng-Han Su ◽  
Wei-Ting Hsu ◽  
Chang-Lung Hsu ◽  
Chang-Hsiao Chen ◽  
Ming-Hui Chiu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Transition Metal Dichalcogenide ◽  
Controllable Synthesis

Engineering Zero-Dimensional Quantum Confinement in Transition-Metal Dichalcogenide Heterostructures

ACS Nano ◽  
2019 ◽  
Vol 13 (7) ◽  
pp. 8303-8311 ◽  
Author(s):  
Christopher C. Price ◽  
Nathan C. Frey ◽  
Deep Jariwala ◽  
Vivek B. Shenoy
Keyword(s):  
Transition Metal ◽  
Quantum Confinement ◽  
Transition Metal Dichalcogenide

Tunable Band Gap Photoluminescence from Atomically Thin Transition-Metal Dichalcogenide Alloys

ACS Nano ◽  
2013 ◽  
Vol 7 (5) ◽  
pp. 4610-4616 ◽  
Author(s):  
Yanfeng Chen ◽  
Jinyang Xi ◽  
Dumitru O. Dumcenco ◽  
Zheng Liu ◽  
Kazu Suenaga ◽  
...  
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Transition Metal Dichalcogenide ◽  
Tunable Band Gap

Two-dimensional transition metal dichalcogenide alloys: preparation, characterization and applications

Nanoscale ◽  
2015 ◽  
Vol 7 (44) ◽  
pp. 18392-18401 ◽  
Author(s):  
L. M. Xie
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Broad Band ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Band Gap Engineering ◽  
Two Dimensional Materials

Alloying allows broad band gap engineering and more for two-dimensional materials.

scholarly journals Tunable Electronic Properties of Lateral Monolayer Transition Metal Dichalcogenide Superlattice Nanoribbons

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 534
Author(s):  
Jinhua Wang ◽  
Gyaneshwar P. Srivastava
Keyword(s):  
Transition Metal ◽  
Band Gap ◽  
Electronic Properties ◽  
Density Functional ◽  
Valence Band Maximum ◽  
Impurity Level ◽  
Asymmetric Structure ◽  
Transition Metal Dichalcogenide ◽  
Structural And Electronic Properties ◽  
Gap States

The structural stability and structural and electronic properties of lateral monolayer transition metal chalcogenide superlattice zigzag and armchair nanoribbons have been studied by employing a first-principles method based on the density functional theory. The main focus is to study the effects of varying the width and periodicity of nanoribbon, varying cationic and anionic elements of superlattice parent compounds, biaxial strain, and nanoribbon edge passivation with different elements. The band gap opens up when the (MoS2)3/(WS2)3 and (MoS2)3/(MoTe2)3 armchair nanoribbons are passivated by H, S and O atoms. The H and O co-passivated (MoS2)3/(WS2)3 armchair nanoribbon exhibits higher energy band gap. The band gap with the edge S vacancy connecting to the W atom is much smaller than the S vacancy connecting to the Mo atom. Small band gaps are obtained for both edge and inside Mo vacancies. There is a clear difference in the band gap states between inside and edge Mo vacancies for symmetric nanoribbon structure, while there is only a slight difference for asymmetric structure. The electronic orbitals of atoms around Mo vacancy play an important role in determining the valence band maximum, conduction band minimum, and impurity level in the band gap.

Non-covalent functionalization of WS2 monolayer with small fullerenes: tuning electronic properties and photoactivity

2016 ◽  
Vol 45 (34) ◽  
pp. 13383-13391 ◽  
Author(s):  
Cai-Yun Luo ◽  
Wei-Qing Huang ◽  
Wangyu Hu ◽  
P. Peng ◽  
Gui-Fang Huang
Keyword(s):  
Transition Metal ◽  
Solar Energy ◽  
Band Gap ◽  
Electronic Properties ◽  
Transition Metal Dichalcogenide ◽  
Covalent Functionalization ◽  
Strong Light ◽  
Energy Applications ◽  
Visible Band ◽  
Ws2 Monolayer

Atomically thin 2-D transition metal dichalcogenide (TMDCs) heterostructures have attracted growing interest due to their massive potential in solar energy applications due to their visible band gap and very strong light–matter interactions.

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