Functionalization of Liquid‐Exfoliated Two‐Dimensional 2H‐MoS2 |
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| Authors: | Dr Claudia Backes Dr Nina C Berner Xin Chen Paul Lafargue Pierre LaPlace Mark Freeley Prof Georg S Duesberg Prof Jonathan N Coleman Dr Aidan R McDonald |
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| Institution: | 1. CRANN/AMBER Nanoscience Institute, Trinity College Dublin (TCD), College Green, Dublin 2 (Ireland);2. School of Physics, TCD;3. School of Chemistry, TCD |
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| 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 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. |
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| Keywords: | 2D materials carboxylate ligands liquid exfoliation surface functionalization transition‐metal dichalcogenides |
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