Recent progress in the CVD-growth of 2D vertical heterostructures based on transition metal dichalcogenides

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xia Jiang ◽  
Fei Chen ◽  
Shichao Zhao ◽  
Weitao Su
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
Transition Metal Dichalcogenides ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
The Past ◽  
Metal Dichalcogenides ◽  
Cvd Growth

Two-dimensional (2D) vertical heterostructures (HSs), which are constructed via vertically stacking two or more 2D transition metal dichalcogenide (TMDC) materials, had been intensively studied during the past several years. However,...

scholarly journals Transition metal dichalcogenide metamaterials with atomic precision

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Battulga Munkhbat ◽  
Andrew B. Yankovich ◽  
Denis G. Baranov ◽  
Ruggero Verre ◽  
Eva Olsson ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Graphene Monolayer ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Precise Control ◽  
Two Dimensional Materials ◽  
Atomic Precision ◽  
Metal Dichalcogenides ◽  
The One

Abstract The ability to extract materials just a few atoms thick has led to the discoveries of graphene, monolayer transition metal dichalcogenides (TMDs), and other important two-dimensional materials. The next step in promoting the understanding and utility of flatland physics is to study the one-dimensional edges of these two-dimensional materials as well as to control the edge-plane ratio. Edges typically exhibit properties that are unique and distinctly different from those of planes and bulk. Thus, controlling the edges would allow the design of materials with combined edge-plane-bulk characteristics and tailored properties, that is, TMD metamaterials. However, the enabling technology to explore such metamaterials with high precision has not yet been developed. Here we report a facile and controllable anisotropic wet etching method that allows scalable fabrication of TMD metamaterials with atomic precision. We show that TMDs can be etched along certain crystallographic axes, such that the obtained edges are nearly atomically sharp and exclusively zigzag-terminated. This results in hexagonal nanostructures of predefined order and complexity, including few-nanometer-thin nanoribbons and nanojunctions. Thus, this method enables future studies of a broad range of TMD metamaterials through atomically precise control of the structure.

scholarly journals Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides

2021 ◽  
Author(s):  
Lujun Huang ◽  
Alex Krasnok ◽  
Andrea Alu ◽  
Yiling Yu ◽  
Dragomir Neshev ◽  
...  
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
Light Emission ◽  
Transition Metal Dichalcogenides ◽  
Research Area ◽  
Photonic Devices ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Bandgap Semiconductors ◽  
Nanophotonic Structures

Abstract Two dimensional (2D) transition metal dichalcogenide (TMDC) materials, such as MoS2, WS2, MoSe2, and WSe2, have received extensive attention in the past decade due to their extraordinary electronic, optical and thermal properties. They evolve from indirect bandgap semiconductors to direct bandgap semiconductors while their layer number is reduced from few layers to a monolayer limit. Consequently, there is strong photoluminescence in a monolayer (1L) TMDC due to the large quantum yield. Moreover, such monolayer semiconductors have two other exciting properties: large binding energy of excitons and valley polarization. These properties make them become ideal materials for various electronic, photonic and optoelectronic devices. However, their performance is limited by the relatively weak light-matter interactions due to their atomically thin form factor. Resonant nanophotonic structures provide a viable way to address this issue and enhance light-matter interactions in 2D TMDCs. Here, we provide an overview of this research area, showcasing relevant applications, including exotic light emission, absorption and scattering features. We start by overviewing the concept of excitons in 1L-TMDC and the fundamental theory of cavity-enhanced emission, followed by a discussion on the recent progress of enhanced light emission, strong coupling and valleytronics. The atomically thin nature of 1L-TMDC enables a broad range of ways to tune its electric and optical properties. Thus, we continue by reviewing advances in TMDC-based tunable photonic devices. Next, we survey the recent progress in enhanced light absorption over narrow and broad bandwidths using 1L or few-layer TMDCs, and their applications for photovoltaics and photodetectors. We also review recent efforts of engineering light scattering, e.g., inducing Fano resonances, wavefront engineering in 1L or few-layer TMDCs by either integrating resonant structures, such as plasmonic/Mie resonant metasurfaces, or directly patterning monolayer/few layers TMDCs. We then overview the intriguing physical properties of different types of van der Waals heterostructures, and their applications in optoelectronic and photonic devices. Finally, we draw our opinion on potential opportunities and challenges in this rapidly developing field of research.

Trap-free exciton dynamics in monolayer WS2 via oleic acid passivation

Nanoscale ◽  
2021 ◽  
Author(s):  
Dabin Lin ◽  
Wenjun Ni ◽  
Gagik G. Gurzadyan ◽  
Fangteng Zhang ◽  
Weiren Zhao ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Transition Metal ◽  
Free Exciton ◽  
Transition Metal Dichalcogenides ◽  
Photonic Devices ◽  
Optoelectronic Properties ◽  
Two Dimensional ◽  
Exciton Dynamics ◽  
The Past ◽  
Metal Dichalcogenides

Two-dimensional transition metal dichalcogenides have attracted tremendous attention in the past few decades due to their attractive optoelectronic properties. However, their widespread utility in photonic devices and components is still...

Two-dimensional transition metal dichalcogenides as atomically thin semiconductors: opportunities and challenges

2015 ◽  
Vol 44 (24) ◽  
pp. 8859-8876 ◽  
Author(s):  
Xidong Duan ◽  
Chen Wang ◽  
Anlian Pan ◽  
Ruqin Yu ◽  
Xiangfeng Duan
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Material Synthesis ◽  
Novel Device ◽  
Metal Dichalcogenides

The recent progress, opportunities and challenges in exploring two-dimensional transition metal dichalcogenides as atomically thin semiconductors are reviewed, including the material synthesis and novel device concepts.

Recent Progress in Atomic Layer Deposition of Multifunctional Oxides and Two-Dimensional Transition Metal Dichalcogenides

2016 ◽  
Vol 04 (04) ◽  
pp. 1640010 ◽  
Author(s):  
Hongfei Liu
Keyword(s):  
Thin Films ◽  
Transition Metal ◽  
Atomic Layer Deposition ◽  
Recent Progress ◽  
Transition Metal Dichalcogenides ◽  
Atomic Layer ◽  
Two Dimensional ◽  
Layer Deposition ◽  
Metal Dichalcogenides ◽  
Multifunctional Oxides

Atomic layer deposition (ALD) has long been developed for conformal coating thin films on planar surfaces and complex structured substrates based on its unique sequential process and self-limiting surface chemistry. In general, the coated thin films can be dielectrics, semiconductors, conductors, metals, etc., while the targeted surface can vary from those of particles, wires, to deep pores, through holes, and so on. The ALD coating technique, itself, was developed from gas-phase chemical vapor deposition, but now it has been extended even to liquid phase coating/growth. Because the thickness of ALD growth is controlled in atomic level ([Formula: see text]0.1[Formula: see text]nm), it has recently been employed for producing two-dimensional (2D) materials, typically semiconducting nanosheets of transition metal dichalcogenides (TMDCs). In this paper, we briefly introduce recent progress in ALD of multifunctional oxides and 2D TMDCs with the focus being placed on suitable ALD precursors and their ALD processes (for both binary compounds and ternary alloys), highlighting the remaining challenges and promising potentials.

Recent progress on transition metal diselenides from formation and modification to applications

Nanoscale ◽  
2022 ◽  
Author(s):  
Yuhan Zhao ◽  
Yibo Yan ◽  
Jong-Min Lee
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
2D Materials ◽  
Transition Metal Dichalcogenides ◽  
Two Dimensional ◽  
Metal Dichalcogenides ◽  
Semiconductor Properties

The development of graphene promotes the research of similar two-dimensional (2D) materials, especially 2D transition metal dichalcogenides (TMDCs) with semiconductor properties.

Engineering of transition metal dichalcogenide-based 2D nanomaterials through doping for environmental applications

2019 ◽  
Vol 4 (4) ◽  
pp. 804-827 ◽  
Author(s):  
Bhuvaneshwari Balasubramaniam ◽  
Narendra Singh ◽  
Prasenjit Kar ◽  
Ankit Tyagi ◽  
Jai Prakash ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Environmental Applications ◽  
Transition Metal Dichalcogenide ◽  
Two Dimensional ◽  
Metal Dichalcogenides ◽  
2D Nanomaterials

This article reviews potential environmental applications of two-dimensional (2D) transition metal dichalcogenides (TMDs) engineered through doping.

Recent Progress in CVD Growth of 2D Transition Metal Dichalcogenides and Related Heterostructures

2019 ◽  
Vol 31 (41) ◽  
pp. 1901694 ◽  
Author(s):  
Yu Zhang ◽  
Yuyu Yao ◽  
Marshet Getaye Sendeku ◽  
Lei Yin ◽  
Xueying Zhan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
Transition Metal Dichalcogenides ◽  
Metal Dichalcogenides ◽  
Cvd Growth
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