Journal article
Functionalization of Liquid-Exfoliated Two-Dimensional 2H-MoS2
Publication Details
Authors: | Backes, C.; Berner, N.; Chen, X.; Lafargue, P.; LaPlace, P.; Freeley, M.; Duesberg, G.; Coleman, J.; McDonald, A. |
Publisher: | WILEY-V C H VERLAG GMBH |
Publication year: | 2015 |
Journal: | Angewandte Chemie |
Pages range : | 2638-2642 |
Volume number: | 54 |
Issue number: | 9 |
Start page: | 2638 |
End page: | 2642 |
Number of pages: | 5 |
ISSN: | 1433-7851 |
DOI-Link der Erstveröffentlichung: |
Abstract
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 2DMoS(2), 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.
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 2DMoS(2), 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.
Keywords
2D materials, carboxylate ligands, liquid exfoliation, transition-metal dichalcogenides
