Journal
NANO RESEARCH
Volume 11, Issue 3, Pages 1369-1378Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1751-8
Keywords
rear earth doping; carbon dots; fluorescence tuning; ferric ion; cell imaging
Categories
Funding
- National Natural Science Foundation of China [21375005, 21575054, 21527808]
Ask authors/readers for more resources
An anomalous enhancement of fluorescence of carbon dots (CDs) was observed via lanthanum (La) doping. La-doped CDs (La-CDs) were prepared through microwave pyrolysis within 4 min. With La3+ doping, the emission band shifted from blue to green although La3+ is non-fluorescent. The quantum yield and fluorescence lifetime improved by about 20% and 35%, respectively. All experiment results indicate that La3+ doping is an effective way to tune fluorescence and improve the performance of CDs. Another unique attribute of La-CDs is high sensitivity to Fe3+. The La-CD-based fluorescence probe was established and used for sensitive and selective detection of Fe3+ with a limit of detection of 91 nmol/L. The proposed fluorescence probe also was successfully employed to visualize intracellular Fe3+ in live HeLa cells through cell imaging. It was also shown that yttrium exhibited the same fluorescence enhancement effect as La. The results may provide a new route for preparing CDs with special properties.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available