Advances in Liquid‐Phase and Intercalation Exfoliations of Transition Metal Dichalcogenides to Produce 2D Framework

Abstract

(5 of 46)www.advmatinterfaces.de Figure 3. a) Electronic band structure of various 2D materials. Reproduced under the terms of the CC-BY 4.0 license. [95] Copyright 2016, The Authors, published by MDPI. b) Energy level diagrams of various TMDCs. Reproduced with permission. [19] Copyright 2017, Elsevier B.V. c) Archetypal coordination of TMDCs, octahedral coordination forms 1T structures, while triangular prismatic coordination establishes 2H/3R structures. Reproduced with permission. [82] Copyright 2019, Elsevier. d) Structural top view of various polytypes; in 2H, two layers per repeat, the unit shows trigonal prismatic coordination and in 1T, one layer per repeat unit formed octahedral coordination of TMDCs. Reproduced with permission. [89] Copyright 2012, Springer Nature. e) 3D illustration of typical MX 2 structure having chalcogen (yellow atom) and metal (gray atom). Reproduced with permission. [104] Copyright 2011, Springer Nature. f) Schematic demonstration of phonon active modes and their symmetries of bulks and monolayer in MX 2 structures. Reproduced under the terms of the CC-BY 3.0 license. [105]

Molybdenum(iv) dithiocarboxylates as single-source precursors for AACVD of MoS2 thin films

“…5,6 MoS 2 has found application in nanoelectronics, [7][8][9][10] optoelectronics, 11,12 sensors, 13 batteries, [14][15][16][17] photovoltaics, 18 photodetectors, 19 phototransistors, 20 lubricants, [21][22][23] and catalysis. 11,13,[24][25][26] Because van der Waals forces hold the layers of MoS 2 together, physical exfoliation of bulk material [27][28][29] is possible for fundamental research and proof-of-concept devices. However, this is not practical for large scale application.…”

“…Because van der Waals forces hold the layers of MoS 2 together, physical exfoliation of bulk material 27–29 is possible for fundamental research and proof-of-concept devices. However, this is not practical for large scale application.…”

2D Material and Perovskite Heterostructure for Optoelectronic Applications

“…Liquid exfoliation is another popular method to fabricate 2D TMDCs which can be further categorized as solvent intercalation, chemical intercalation, and electrochemical intercalation (Figure 2a,b) [49,51,52]. It typically yields nanosheets with small lateral sizes (<1 µm) which tend to aggregate upon deposition.…”

A Review of Transition Metal Dichalcogenides-Based Biosensors

“…There are various methods to prepare TMDCs film, such as mechanical exfoliation ( Liu, 2021 ), liquid exfoliation ( Raza et al, 2021 ) and chemical exfoliation ( Sun et al, 2017 ). During the preparation of TMDCs film, the structure of TMDCs usually develop atomic defects due to thermal equilibrium and kinetics of processing ( Cavallini and Gentili, 2022 ), some sulfur atoms are naturally separated from the TMDCs flakes, resulting in sulfur vacancies ( Trainer et al, 2022 ).…”