Fabrication of blue luminescent MoS₂ quantum dots by wet grinding assisted co-solvent sonication

다국어 초록 (Multilingual Abstract)

Molybdenum disulfide (MoS<SUB>2</SUB>) belongs to transition-metal dichalcogenides (TMDs) family and has vital position among 2D materials. Here, an efficient strategy for the synthesis of zero-dimensional MoS<SUB>2</SUB> quantum dots (QDs) has been represented. This strategy consists of wet grinding of pristine MoS<SUB>2</SUB> in N-methyl-2-pyrrolidone (NMP) followed by sonication in NMP and 1,2-dichlorobenzene (o-DCB). The efficacy of this approach to synthesize MoS<SUB>2</SUB> QDs has been reported by analyzing the as synthesized MoS<SUB>2</SUB> QDs by different characterization techniques such as high resolution transmission electron microscopy, energy dispersive x-ray spectroscopy, Raman spectroscopy, photoluminescence spectroscopy, Fourier transform infrared spectroscopy and UV-vis spectroscopy. The concentration (yield) of as synthesized MoS<SUB>2</SUB> QDs was found to be 7mgmL<SUP>-1</SUP>. Most of the MoS<SUB>2</SUB> QDs were measured around 2-5nm in size. The as synthesized MoS<SUB>2</SUB> QDs showed distinct blue luminescence upon UV excitation.