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

We report the synthesis of superhydrophobic two-dimensional (2D) transition metal dichalcogenides by modulation of the degree of atomic defects. The presence of atomic vacancies in 2D molybdenum disulfide (MoS2) nanoassemblies dictated hydrophilic-to-hydrophobic transition and subsequent cell adhesion.

Download Full-text

Transition metal dichalcogenide metamaterials with atomic precision

Nature Communications ◽

10.1038/s41467-020-18428-2 ◽

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.

Download Full-text

Environmental impact and potential health risks of 2D nanomaterials

Environmental Science Nano ◽

10.1039/c7en00401j ◽

2017 ◽

Vol 4 (8) ◽

pp. 1617-1633 ◽

Cited By ~ 23

Author(s):

Michaela Fojtů ◽

Wei Zhe Teo ◽

Martin Pumera

Keyword(s):

Environmental Impact ◽

Transition Metal ◽

Health Risks ◽

Transition Metal Dichalcogenides ◽

Two Dimensional ◽

Potential Health ◽

Environment And Health ◽

Metal Dichalcogenides ◽

2D Nanomaterials ◽

Potential Impact

The prospective intensive utilization of two-dimensional (2D) nanomaterials, such as graphene, transition metal dichalcogenides, and black phosphorus, increased the requirements for thorough comprehension of their potential impact on the environment and health.

Download Full-text

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

CrystEngComm ◽

10.1039/d1ce01289d ◽

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,...

Download Full-text

Predicting two-dimensional topological phases in Janus materials by substitutional doping in transition metal dichalcogenide monolayers

npj 2D Materials and Applications ◽

10.1038/s41699-019-0118-2 ◽

2019 ◽

Vol 3 (1) ◽

Cited By ~ 10

Author(s):

Aniceto B. Maghirang ◽

Zhi-Quan Huang ◽

Rovi Angelo B. Villaos ◽

Chia-Hsiu Hsu ◽

Liang-Ying Feng ◽

...

Keyword(s):

Transition Metal ◽

2D Materials ◽

Transition Metal Dichalcogenides ◽

Chemical Properties ◽

Industrial Applications ◽

Transition Metal Dichalcogenide ◽

Two Dimensional ◽

Substitutional Doping ◽

Metal Dichalcogenides ◽

Physical And Chemical

Abstract Ultrathin Janus two-dimensional (2D) materials are attracting intense interest currently. Substitutional doping of 2D transition metal dichalcogenides (TMDs) is of importance for tuning and possible enhancement of their electronic, physical and chemical properties toward industrial applications. Using systematic first-principles computations, we propose a class of Janus 2D materials based on the monolayers MX2 (M = V, Nb, Ta, Tc, or Re; X = S, Se, or Te) with halogen (F, Cl, Br, or I) or pnictogen (N, P, As, Sb, or Bi) substitution. Nontrivial phases are obtained on pnictogen substitution of group VB (V, Nb, or Ta), whereas for group VIIB (Tc or Re), the nontrivial phases are obtained for halogen substitution. Orbital analysis shows that the nontrivial phase is driven by the splitting of M-dyz and M-dxz orbitals. Our study demonstrates that the Janus 2D materials have the tunability and suitability for synthesis under various conditions.

Download Full-text

Super-resolved Optical Mapping of Reactive Sulfur-Vacancies in Two-Dimensional Transition Metal Dichalcogenides

ACS Nano ◽

10.1021/acsnano.1c00373 ◽

2021 ◽

Author(s):

Miao Zhang ◽

Martina Lihter ◽

Tzu-Heng Chen ◽

Michal Macha ◽

Archith Rayabharam ◽

...

Keyword(s):

Transition Metal ◽

Optical Mapping ◽

Transition Metal Dichalcogenides ◽

Two Dimensional ◽

Metal Dichalcogenides

Download Full-text

Supercapacitors based on two-dimensional transition metal dichalcogenides and their hybrids

Fundamentals and Supercapacitor Applications of 2D Materials ◽

10.1016/b978-0-12-821993-5.00002-9 ◽

2021 ◽

pp. 159-191

Author(s):

Himani Chauhan ◽

Sasanka Deka

Keyword(s):

Transition Metal ◽

Transition Metal Dichalcogenides ◽

Two Dimensional ◽

Metal Dichalcogenides

Download Full-text

Second-harmonic generation enhancement in monolayer transition-metal dichalcogenides by using an epsilon-near-zero substrate

Nanoscale Advances ◽

10.1039/d0na00779j ◽

2021 ◽

Vol 3 (1) ◽

pp. 272-278

Author(s):

Pilar G. Vianna ◽

Aline dos S. Almeida ◽

Rodrigo M. Gerosa ◽

Dario A. Bahamon ◽

Christiano J. S. de Matos

Keyword(s):

Dielectric Constant ◽

Transition Metal ◽

Harmonic Generation ◽

Nonlinear Effect ◽

Second Harmonic ◽

2D Materials ◽

Transition Metal Dichalcogenides ◽

Transition Metal Dichalcogenide ◽

Metal Dichalcogenides ◽

Epsilon Near Zero

The scheme illustrates a monolayer transition-metal dichalcogenide on an epsilon-near-zero substrate. The substrate near-zero dielectric constant is used as the enhancement mechanism to maximize the SHG nonlinear effect on monolayer 2D materials.

Download Full-text

Combined Healing and Doping of Transition Metal Dichalcogenides Through Molecular Functionalization

Journal of Materials Chemistry C ◽

10.1039/d1tc01329g ◽

2021 ◽

Author(s):

Sai Manoj Gali ◽

David Beljonne

Keyword(s):

Transition Metal ◽

Charge Transport ◽

2D Materials ◽

Transition Metal Dichalcogenides ◽

Two Dimensional ◽

Metal Dichalcogenides

Transition Metal Dichalcogenides (TMDCs) are emerging as promising two-dimensional (2D) materials. Yet, TMDCs are prone to inherent defects such as chalcogen vacancies, which are detrimental to charge transport. Passivation of...

Download Full-text