Abstract
Molybdenum disulfide (MoS2) has received considerable attention due to its promising biomedical technologies, foldable displays and optoelectronic properties. In this work, the vacuum synthetic technology was employed to grow four-layer MoS2 from sulfur powder and molybdenum trioxide (MoO3), after holding in a threaded crucible for 30 min at 1273 K. One characteristic of this process is to increase the pressure of sulfur by using the threaded crucible. The composition and morphology of the products depend upon the synthetic temperature. The vacuum-prepared MoS2 was used as a precursor for mono- or few-layers materials by ultrasonic treatment in isopropanol solution (IPA). The structure, morphology, composition, band gap and photoluminescence (PL) of MoS2 with mono- and few-layers were investigated in detail. This work has a great impact on the tunable layers and bandgap of MoS2.
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