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Physical investigation of spin-coated MoS2 films
* 1 , * 1 , * 1 , * 2 , * 1 , * 1 , * 1
1  Dipartimento di Fisica, Università della Calabria 87036 Rende CS, Italy
2  Notredame s.r.l., c/o Dipartimento di Fisica, Università della Calabria, Italy

Abstract:

Amongst emerging Transition Metal Dichalcogenides (TMDCs), molybdenum disulfide (MoS2) has attracted a remarkable interest thanks to many possible applications. In particular, MoS2 has potentialities not yet fully realized in solution-based applications. The morphological and the structural properties of MoS2 films deposited by spin-coating onto Si/SiO2 substrates were investigated by Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Micro-Raman Spectroscopy. High resolution AFM imaging highlights the presence of a layered structure. The thickness of each layer is estimated to be around 13 nm. Micro-Raman measurements reveal that there is the coexistence of both 2H-MoS2 and 1T-MoS2 phases, which could be useful for electrical applications. Moreover, the band at 290 cm-1 is assigned to the amorphous phase of MoS2. The detectability of the mode E1g in back scattering geometry is ascribed to the disorder of the amorphous phase.

Keywords: thin films; molybdenum disulfide; Transition Metal Dichalcogenides; micro-Raman Spectroscopy
Comments on this paper
Antonio Di Bartolomeo
Question
I concur that the coexistence of both 2H-MoS2 and 1T-MoS2 phases could be useful for electrical applications. Have you performed any electrical characterization of the MoS2 films, for instance as a function of temperature?
Grazia Giuseppina Politano
Thank you for your suggestion. Electrical measurements are in progress.



 
 
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