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Functionalization of Liquid‐Exfoliated Two‐Dimensional 2H‐MoS 2
Author(s) -
Backes Claudia,
Berner Nina C.,
Chen Xin,
Lafargue Paul,
LaPlace Pierre,
Freeley Mark,
Duesberg Georg S.,
Coleman Jonathan N.,
McDonald Aidan R.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201409412
Subject(s) - surface modification , thermogravimetric analysis , x ray photoelectron spectroscopy , catalysis , salt (chemistry) , sulfur , fourier transform infrared spectroscopy , transition metal , materials science , dispersion (optics) , diffuse reflectance infrared fourier transform , spectroscopy , metal , infrared spectroscopy , chemistry , chemical engineering , inorganic chemistry , organic chemistry , metallurgy , optics , physics , photocatalysis , quantum mechanics , engineering
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 MoS 2 . We found that the reaction of liquid‐exfoliated 2D MoS 2 , with M(OAc) 2 salts (M=Ni, Cu, Zn; OAc=acetate) yielded functionalized MoS 2 –M(OAc) 2 materials. Importantly, this method furnished the 2H‐polytype of MoS 2 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 MoS 2 surface sulfur atoms to the M(OAc) 2 salt. Interestingly, functionalization of 2H‐MoS 2 allows for its dispersion/processing in more conventional laboratory solvents.