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6. Functionalization of Liquid‐Exfoliated Two‐Dimensional 2H‐MoS2

Claudia Backes, Nina C Berner, Xin Chen, Paul Lafargue, Pierre LaPlace, Mark Freeley, Georg S Duesberg, Jonathan N Coleman, Aidan R McDonald – 2015

Layered two-dimensional (2D) inorganic transition-metal dichalchogenides (TMDs) have attracted great interest as a result of their potential application in optoelectronics, catalysis, and medicine. However, methods to functionalize and process such 2D TMDs remain scarce. We have established a facile route towards functionalized layered MoS2. We found that the reaction of liquid-exfoliated 2D MoS2, with M(OAc)2 salts (M=Ni, Cu, Zn; OAc=acetate) yielded functionalized MoS2–M(OAc)2 materials. Importantly, this method furnished the 2H-polytype of MoS2 which is a semiconductor. X-ray photoelectron spectroscopy (XPS), diffuse reflectance infrared Fourier transform spectroscopy (DRIFT–IR), and thermogravimetric analysis (TGA) provide strong evidence for the coordination of MoS2 surface sulfur atoms to the M(OAc)2 salt. Interestingly, functionalization of 2H-MoS2 allows for its dispersion/processing in more conventional laboratory solvents.

Title
6. Functionalization of Liquid‐Exfoliated Two‐Dimensional 2H‐MoS2
Author
Claudia Backes, Nina C Berner, Xin Chen, Paul Lafargue, Pierre LaPlace, Mark Freeley, Georg S Duesberg, Jonathan N Coleman, Aidan R McDonald
Date
2015
Identifier
doi.org/10.1002/anie.201409412
Citation
Angew. Chem. Int. Ed., 54: 2638-2642 (2015).
Type
Text