Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 1, Issue 32, Pages 4925-4932Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc30701h
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Funding
- National High Technology Research and Development Program of China (863 Program) [2012AA030313]
- National Natural Science Foundation of China [21076103, 21006046]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20103221110001]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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We report a simple, low-cost and green route for fabrication of fluorescent carbon dots (CDs), and demonstrate their applications in sensing, patterning, and coding. Pyrolysis of various plant leaves yielded bright blue-emitting CDs, providing a one-step way for large-scale production of CDs without surface passivation treatment or the use of toxic/expensive solvents and starting materials. Also, further improvement in the fluorescence intensity of CDs was achieved after treatment using plasma and microwave-assisted techniques. The obtained CDs were applied as a fluorescent sensing platform for sensitive and selective detection of Fe3+ ions, and as fluorescent inks for printing luminescent patterns useful in anti-counterfeit and optoelectronic applications. Moreover, uniform fluorescent microbeads of polymer-encapsulated CDs, CD/QD nanocomposites, and CD/organic fluorescent dye nanocomposites were prepared via a microfluidic process, which may expand the potential applications of CDs in coding, bioimaging, and drug delivery.
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