Indian Journal of Engineering & Materials Sciences

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Effect of Mechanical Grinding and Sonication on the Optical Properties Of MoS2 Nanosheets


Affiliations
1 Department of Physics, J C Bose University of Science & Technology YMCA, Faridabad 121 006, India
2 Department of Physics, Netaji Subhas University of Technology, East Campus, Delhi 110 031, India
3 Department of Nanosciences & Materials, Central University of Jammu, Jammu and Kashmir 181 143, India
 

In the present study, MoS2 nanosheets are prepared by a two-step, grinding-assisted ultrasonication technique. Various parameters governing the optical, electrical, and dielectric properties of the MoS2 nanosheets are determined from the absorbance, reflectance, and transmittance spectra acquired using UV-Vis spectroscopy. These parameters are analysed with change in grinding hours as well as for sonication effects. It is observed that the absorption coefficient, optical conductivity, and dissipation factor increase (along with a decrease in refractive index) with increase in grinding hours and with sonication. The obtained changes in the optical parameters are correlated with the number of exfoliated layers revealed by Raman spectroscopy. The results of this study provide insightful information about the layer-dependent properties of MoS2 nanosheets and develop better understanding of how the synthesis routes are effective for tailoring the optical response of MoS2 nanosheets.

Keywords

Exfoliation, Molybdenum Disulphide (MoS2), Optical Properties, UV-Vis Spectroscopy.
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  • Effect of Mechanical Grinding and Sonication on the Optical Properties Of MoS2 Nanosheets

Abstract Views: 66  |  PDF Views: 44

Authors

Shweta
Department of Physics, J C Bose University of Science & Technology YMCA, Faridabad 121 006, India
Vinamrita Singh
Department of Physics, Netaji Subhas University of Technology, East Campus, Delhi 110 031, India
Kaushal Kumar
Department of Physics, J C Bose University of Science & Technology YMCA, Faridabad 121 006, India
Tanuj Kumar
Department of Nanosciences & Materials, Central University of Jammu, Jammu and Kashmir 181 143, India
Arun Kumar
Department of Physics, J C Bose University of Science & Technology YMCA, Faridabad 121 006, India

Abstract


In the present study, MoS2 nanosheets are prepared by a two-step, grinding-assisted ultrasonication technique. Various parameters governing the optical, electrical, and dielectric properties of the MoS2 nanosheets are determined from the absorbance, reflectance, and transmittance spectra acquired using UV-Vis spectroscopy. These parameters are analysed with change in grinding hours as well as for sonication effects. It is observed that the absorption coefficient, optical conductivity, and dissipation factor increase (along with a decrease in refractive index) with increase in grinding hours and with sonication. The obtained changes in the optical parameters are correlated with the number of exfoliated layers revealed by Raman spectroscopy. The results of this study provide insightful information about the layer-dependent properties of MoS2 nanosheets and develop better understanding of how the synthesis routes are effective for tailoring the optical response of MoS2 nanosheets.

Keywords


Exfoliation, Molybdenum Disulphide (MoS2), Optical Properties, UV-Vis Spectroscopy.

References