Journal
NANOSCALE
Volume 9, Issue 16, Pages 5049-5054Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr01260h
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Funding
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Basic Research Program of China (973 Program) [2012CB825803, 2013CB932702]
- National Natural Science Foundation of China [51422207, 51132006, 51572179, 21471106, 21501126, 21373144, 21527805]
- International Collaboration program - Chinese Ministry of Science and Technology [2016YFE0129800]
- Specialized Research Fund for the Doctoral Program of Higher Education [20123201110018]
- Natural Science Foundation of Jiangsu Province of China [BK20140310, BK20150007]
- China Postdoctoral Science Foundation [2014 M560445, 2015 T80581]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Random lasers have been extensively and intensively investigated due to their fundamental importance and promising applications. Here, we explored the lasing behavior of carbon quantum dot (CQD)/Rhodamine B (RhB) composites. CQDs exhibited a broad emission spectrum which overlapped with the absorption spectrum of the RhB dye. We investigated an approach wherein the -OH, -NH2 and -PO4 group functionalized CQD/RhB composites showed lasing behavior. The optical pumping of functionalized CQD/RhB composites exhibited lasing emission which is dynamically tunable as a function of the surface properties of CQDs at the laser wavelength of 532 nm by varying the pump energy. The PO4-CQD/RhB composites showed a typical lasing emission with a line-width of 3.2 nm at 587 nm at 1.86 mJ pump energy. We also demonstrated that the pH value of CQD solution played a key role on the lasing behavior of CQD/composites.
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