Strongly luminescent monolayered MoS2 prepared by effective ultrasound exfoliation
2013; Royal Society of Chemistry; Volume: 5; Issue: 8 Linguagem: Inglês
10.1039/c3nr00192j
ISSN2040-3372
Autores Tópico(s)MXene and MAX Phase Materials
ResumoIntense ultrasound in a pressurized batch reactor was used for preparation of monolayered MoS2nanosheets from natural mineral molybdenite. Exfoliation of bulk MoS2 using ultrasound is an attractive route to large-scale preparation of monolayered crystals. To evaluate the quality of delamination, methods like X-ray diffraction, Raman spectroscopy and microscopic techniques (TEM and AFM) were employed. From single- or few-layered products obtained from intense sonication, MoS2quantum dots (MoSQDs) were prepared by a one-pot reaction by refluxing exfoliated nanosheets of MoS2 in ethylene glycol under atmospheric pressure. The synthesised MoSQDs were characterised by photoluminescence spectroscopy and laser-scattering particle size analysis. Our easy preparation leads to very strongly green luminescing quantum dots.
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