Utilizing the Connors-Wright Equation to Prepare an Appropriate Binary Solution in order to Use in LPE Process
Paper ID : 1441-ICNS
Najme Sadat Taghavi *, Reza Afzalzadeh
K. N. Toosi University of Technology
Molybdenum Disulfide (MoS2) is one of Transition Metal Dichalcogenides (TMDs). These are one of the most studied families of layered materials. Because of the simplicity and cheapness, ultrasonication in a liquid is an important technique for the exfoliation of 2D materials. The obtained nanoflakes should be characterized by different methods (like UV-Visible and Raman Spectroscopy). In this work, we prepared the 2D nanosheets of MoS2 via Liquid Phase Exfoliation (LPE) method in various solutions. Our findings from UV-Visible spectroscopy show that the minimum thickness of MoS2 nanoflakes is obtained for the solution with the surface tension of γ=40mN/m. For a 2-component (binary) solution (like water/ethanol solution), calculating the surface tension of the mixture is an important step of the study. We successfully utilized the Connors-Wright equation to find the proper amount of each component to get γ=40mN/m. The Raman spectra confirmed that we obtained the few- (and even mono-) layers of MoS2.
MoS2 nanoflakes; LPE method; surface tension; bandgap; thickness of layers.
Status : Abstract Accepted (Poster Presentation)