TY - JOUR
T1 - Fabrication of transition metal dichalcogenides quantum dots based on femtosecond laser ablation
AU - Xu, Yanmin
AU - Yan, Lihe
AU - Li, Xiaoyu
AU - Xu, Huanhuan
N1 - Publisher Copyright:
© 2019, The Author(s).
PY - 2019/12/1
Y1 - 2019/12/1
N2 - As heavy metal-free quantum dots, transition metal dichalcogenides (TMDs) and boron nitride (BN) quantum dots (QDs) have aroused great interest due to features such as good thermal conductivity, chemical stability, and unique optical properties. Although TMDs have been synthesized using different methods, most of these methods require time-consuming or complex steps, limiting the applications of TMDs. We propose a fast and simple method for the synthesis of high-quality molybdenum disulfide (MoS 2 ) QDs and tungsten disulfide (WS 2 ) QDs based on femtosecond laser ablation and sonication-assisted liquid exfoliation. The prepared MoS 2 QDs and WS 2 QDs were characterized by transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The resulting products possessed few-layered thickness with an average size of 3.7 nm and 2.1 nm. Due to the abundance of functional groups on their surface, the MoS 2 QDs and WS 2 QDs showed bright blue-green luminescence under UV irradiation. Our method offers a facile and novel synthetic strategy for TMDs QDs and other two-dimensional nanomaterial quantum dots, such as boron nitride quantum dots (BNQDs).
AB - As heavy metal-free quantum dots, transition metal dichalcogenides (TMDs) and boron nitride (BN) quantum dots (QDs) have aroused great interest due to features such as good thermal conductivity, chemical stability, and unique optical properties. Although TMDs have been synthesized using different methods, most of these methods require time-consuming or complex steps, limiting the applications of TMDs. We propose a fast and simple method for the synthesis of high-quality molybdenum disulfide (MoS 2 ) QDs and tungsten disulfide (WS 2 ) QDs based on femtosecond laser ablation and sonication-assisted liquid exfoliation. The prepared MoS 2 QDs and WS 2 QDs were characterized by transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The resulting products possessed few-layered thickness with an average size of 3.7 nm and 2.1 nm. Due to the abundance of functional groups on their surface, the MoS 2 QDs and WS 2 QDs showed bright blue-green luminescence under UV irradiation. Our method offers a facile and novel synthetic strategy for TMDs QDs and other two-dimensional nanomaterial quantum dots, such as boron nitride quantum dots (BNQDs).
UR - https://www.scopus.com/pages/publications/85062221568
U2 - 10.1038/s41598-019-38929-5
DO - 10.1038/s41598-019-38929-5
M3 - 文章
C2 - 30814552
AN - SCOPUS:85062221568
SN - 2045-2322
VL - 9
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 2931
ER -