Journal
CHEMNANOMAT
Volume 2, Issue 3, Pages 171-175Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cnma.201500228
Keywords
carbon nanodots; defects; photoluminescence; ratiometric sensors
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Funding
- National Natural Science Foundation [21203098]
- China Postdoctoral Science Foundation [2013M530247]
- Science and Technology Foundation of Guizhou Province [J[2013]2277]
- Natural Science Foundation of Guizhou Province Education Department [KY[2013]192]
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Carbon nanodots (CNDs) with conspicuous dual emission (at 450 and 517 nm) were fabricated by hydrothermal treatment of aqueous sucrose solution. The temperature-dependent photoluminescence (PL) and time-resolved PL were investigated. The trapping of excited electrons by the nonradiative defects should substantially account for the PL quenching as the temperature increases. The sucrose-derived CNDs show great potential for applications as ratiometric fluorescent thermometers with a sensitivity of approximately 2.15% degrees C-1.
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