Abstract
Recently, molybdenum disulfide (MoS2) quantum dots (QDs) have been extensively investigated because of their unique quantum confinement and boundary effects as well as potential applications in fluorescence imaging, electrochemical catalysis, and biosensors. In this study, we synthesize MoS2 QDs by using a one-step hydrothermal method with ammonium tetrathiomolybdate as the precursor and hydrazine hydrate as the reducing agent. The morphology and structural characteristics of MoS2 QDs are analyzed by transmission electron microscopy, and optical properties are characterized using UV-Vis absorption and photoluminescence spectroscopy. The cytotoxicity of MoS2 QDs is tested by MTT assay. MoS2 QDs in biomedical imaging is demonstrated by a simple incubation study with U251 cells. Experimental results demonstrate that MoS2 QDs can be used for biomedical imaging applications.
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