Abstract
Tin disulfide (SnS2) quantum dots (QDs) have been used in the fields of sensors. However, the reported SnS2 QDs were fabricated by the wet chemical method which was complicated. In this paper, we synthesized SnS2 QDs by a facile ultrasonic probe sonication process. The average size of SnS2 QDs was 3 nm which was observed in the transmission electron microscope (TEM) images. Two vibrational modes of SnS2 QDs were observed at 203 cm-1 (Eg) and 310 cm-1 (A1g) in the Raman spectrum. There was an absorption peak at 320 nm in the UV-Vis spectrum. Excitation wavelength dependent photoluminescence (PL) was measured. The maximum PL intensity of SnS2 QDs was observed at 450 nm under the excitation wavelength of 370 nm. This indicates that the SnS2 QDs have potential applications in optical devices.
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