Defect Engineering of Two‐Dimensional Molybdenum Disulfide

@article{Chen2020DefectEO,
  title={Defect Engineering of Two‐Dimensional Molybdenum Disulfide},
  author={Xin Chen and Peter Denninger and Tanja Stimpel‐Lindner and Erdmann Spiecker and Georg S. Duesberg and Claudia Backes and Kathrin C. Knirsch and Andreas Hirsch},
  journal={Chemistry (Weinheim an Der Bergstrasse, Germany)},
  year={2020},
  volume={26},
  pages={6535 - 6544}
}
Abstract Two‐dimensional (2D) molybdenum disulfide (MoS2) holds great promise in electronic and optoelectronic applications owing to its unique structure and intriguing properties. The intrinsic defects such as sulfur vacancies (SVs) of MoS2 nanosheets are found to be detrimental to the device efficiency. To mitigate this problem, functionalization of 2D MoS2 using thiols has emerged as one of the key strategies for engineering defects. Herein, we demonstrate an approach to controllably… 
19 Citations

Figures and Tables from this paper

Intercalation‐Driven Defect‐Engineering of MoS2 for Catalytic Transfer Hydrogenation

Crystal defects are pivotal to boosting catalytic performance and an in‐depth understanding of the working mechanism of transition‐metal chalcogenides (TMDs), but their facile and controllable

Covalent Bisfunctionalization of Two‐Dimensional Molybdenum Disulfide

This systematic study on the formation and reactivity of covalently functionalized MoS2 hybrids will provide some practical guidance on multi‐angle tailoring of the properties of 2DMoS2 for various potential applications.

Covalently functionalized layered MoS2 supported Pd nanoparticles as highly active oxygen reduction electrocatalysts.

The oxygen reduction on PdNPs/f-MoS2 proceeded through the energy efficient four-electron pathway, showing great potential for the use of layered transition metal dichalcogenides in energy conversion applications, comprising fuel cells.

An ion-selective crown ether covalently grafted onto chemically exfoliated MoS2 as a biological fluid sensor.

We describe the basal plane functionalization of chemically exfoliated molybdenum disulfide (ce-MoS2) nanosheets with a benzo-15-crown-5 ether (B15C5), promoted by the chemistry of diazonium salts en

Site‐Selective Oxidation of Monolayered Liquid‐Exfoliated WS2 by Shielding the Basal Plane through Adsorption of a Facial Amphiphile

The general importance of the surfactant choice and how detrimental or beneficial a certain surfactants can be to the desired functionalization is shown.

The Role of Additives in Suppressing the Degradation of Liquid‐Exfoliated WS2 Monolayers

Group VI transition metal dichalcogenides (TMDs) are considered to be chemically widely inert, but recent reports point toward an oxidation of monolayered sheets in ambient conditions, due to

Oxidative etching of S-vacancy defective MoS2 monolayer upon reaction with O2.

It is found that the surface distribution of S vacancy sites plays a key role in determining the surface reactivity towards O2 and the desorption of SO2 after oxygen abstraction from the other adjacent O2 molecule is observed.

Molybdenum Diselenide and Tungsten Diselenide Interfacing Cobalt-Porphyrin for Electrocatalytic Hydrogen Evolution in Alkaline and Acidic Media

Easy and effective modification approaches for transition metal dichalcogenides are highly desired in order to make them active toward electrocatalysis. In this manner, we report functionalized

Carbon Nano-onions: Potassium Intercalation and Reductive Covalent Functionalization

The synthesis of covalently functionalized carbon nano-onions via a reductive approach using unprecedented alkali-metal CNO intercalation compounds will pave the way for the use of CNOs in a wide range of potential applications, such as energy storage, photovoltaics, or molecular electronics.

Covalent Functionalization of Nickel Phosphide Nanocrystals with Aryl-Diazonium Salts

Covalent functionalization of Ni2P nanocrystals was demonstrated using aryl-diazonium salts. Spontaneous adsorption of aryl functional groups was observed, with surface coverages ranging from 20-96%

References

SHOWING 1-10 OF 62 REFERENCES

Functionalization of Two-Dimensional MoS2 : On the Reaction Between MoS2 and Organic Thiols.

The findings suggest that functionalization of two-dimensional MoS2 using organic thiols may not yield covalently or datively tethered functionalities, rather, in this instance, they yield physisorbed disulfides that are easily removed.

Basal-Plane Ligand Functionalization on Semiconducting 2H-MoS2 Monolayers.

A facile approach to covalently functionalize chemical vapor deposition (CVD) grown 2H-MoS2 monolayers (MLs) via thiol conjugation at sulfur vacancies on the basal plane is reported, and it is experimentally proved that sulfur vacancies in MoS2 MLs play a key role in the functionalization of basal planes.

Intrinsic structural defects in monolayer molybdenum disulfide.

The atomic scale study of structural defects presented here brings new opportunities to tailor the properties of MoS2 via controlled synthesis and defect engineering.

Basal-Plane Functionalization of Chemically Exfoliated Molybdenum Disulfide by Diazonium Salts.

This work demonstrates a functionalization route that results in organic groups bonded to the MoS2 surface via covalent C-S bonds, based on lithium intercalation, chemical exfoliation and subsequent quenching of the negative charges residing on theMoS2 by electrophiles such as diazonium salts.

Controlled Doping of Vacancy-Containing Few-Layer MoS2 via Highly Stable Thiol-Based Molecular Chemisorption.

The excellent binding stability of thiol molecules and recovery properties by thermal annealing will enable broader applicability of ultrathin MoS2 to various devices.

Two-Dimensional MoS2 Catalyzed Oxidation of Organic Thiols

Thiol-chemistry directed techniques have been extensively employed to modify the properties of two-dimensional MoS2 nanosheets, aiming to heal or functionalize sulfur vacancies. However, the exact

Defect engineering of two-dimensional transition metal dichalcogenides

Two-dimensional transition metal dichalcogenides (TMDs), an emerging family of layered materials, have provided researchers a fertile ground for harvesting fundamental science and emergent

Atomic Observation of Filling Vacancies in Monolayer Transition Metal Sulfides by Chemically Sourced Sulfur Atoms.

The microscopic origin of the defect healing observed in TFSI-treated 1L-MoS2 is reported, revealing how defect-mediated nonradiative recombination can be effectively eliminated by a simple chemical treatment method, thereby advancing the practical applications of monolayer semiconductors.

Towards intrinsic charge transport in monolayer molybdenum disulfide by defect and interface engineering.

A facile low-temperature thiol chemistry route is developed to repair the sulfur vacancies and improve the interface, resulting in significant reduction of the charged impurities and traps, providing a clear path towards intrinsic charge transport in two-dimensional dichalcogenides for future high-performance device applications.

Molecular chemistry approaches for tuning the properties of two-dimensional transition metal dichalcogenides.

The most enlightening recent advancements in experimental (supra)molecular chemistry methods for tailoring the properties of atomically-thin TMDs - in the form of substrate-supported or solution-dispersed nanosheets - are reviewed and the challenges towards the realization of novel hybrid materials and devices based on 2D semiconductors and molecular systems are discussed.
...