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Production of carbon dots during the liquid phase exfoliation of MoS2 quantum dots
Zhang, Weimin; Du, Jinhong; Liu, Zhibo; Zhang, Dingdong; Wei, Qinwei; Liu, Haichao; Ma, Wei; Ren, Wencai; Cheng, Hui-Ming
2019-12-01
Source PublicationCARBON
ISSN0008-6223
Volume155Pages:243-249
AbstractN-methyl-2-pyrrolidone (NMP) has been widely used as a solvent for preparing two-dimensional quantum dots (2D-QDs) by probe sonication. Here we found that carbon dots (CDs) are simultaneously produced by the carbonization of NMP when preparing MoS2 QDs in a NMP solvent by probe sonication. These two kinds of QDs are similar in color, crystal structure, excitation wavelength dependent photoluminescence (PL), and have overlaps in their absorption spectra and coincidence of PL peaks. As a result, the co-production of CDs has not previously been recognized. The CDs show strong optical interactions with the MoS2 QDs, which leads to a dramatic decrease in the fluorescence intensity of the CDs/MoS2 QDs. Moreover, we found that the carbonization also occurs for the commonly used organic solvents. These findings suggest that associated production of CDs should be considered when preparing 2D-QDs by probe sonication, and the resulting hybrid CDs/2D-QDs will provide opportunities to design their properties and uses. (C) 2019 Elsevier Ltd. All rights reserved.
Indexed BySCI
Language英语
WOS IDWOS:000491864400029
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80598
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Weimin,Du, Jinhong,Liu, Zhibo,et al. Production of carbon dots during the liquid phase exfoliation of MoS2 quantum dots[J]. CARBON,2019,155:243-249.
APA Zhang, Weimin.,Du, Jinhong.,Liu, Zhibo.,Zhang, Dingdong.,Wei, Qinwei.,...&Cheng, Hui-Ming.(2019).Production of carbon dots during the liquid phase exfoliation of MoS2 quantum dots.CARBON,155,243-249.
MLA Zhang, Weimin,et al."Production of carbon dots during the liquid phase exfoliation of MoS2 quantum dots".CARBON 155(2019):243-249.
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