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In this study, we presented a report on effect of growth parameters (seeding promoter, growth temperature, Ar gas flow rate) on the formation of MoS2 monolayer. The morphology and structure of as-grown MoS2 were investigated in detail by optical microscopy, atomic force microscopy, Raman and photoluminesence spectroscopy techniques. The results showed that a highly reproducible growth of dense MoS2 triangular flakes with the size of ~35 µm over large area (~1.5x1 cm2) can be obtained by using a optimized parameters. The MoS2 field effect transistors based on the as-grown MoS2 exhibited carrier mobility of 0.5–2 cm2V−1s−1 and On/Off ratio of ~104. Our results can provide a useful information to realize large area, high quality of MoS2 for real electronic applications.

In this paper, we present the obtained results in the fabrication and thermal properties of nanofluid-based Coolant 20 containing carbon nanotubes (CNTs). To improve dispersion efficiency, CNTs materials were functionalized with an -OH functional group by chemical methods. After the functionalization process, the CNTs-OH materials were dispersed into Coolant 20 based fluid by surfactant and the ultrasonic vibration method. The experimental results of size distribution spectrum and Zeta potential show that carbon nanotubes were dispersed uniformly and stably in the based fluid. The presence of CNTs has improved thermal conductivity of the nanofluid, with a concentration of 1,0 vol.% CNTs showing an increase in thermal conductivity of 65%. Nanofluid-based Coolant 20 containing carbon nanotubes helped to improve heat exchange efficiency for components and devices operating under special conditions, among other applications.