Jump to main content
Jump to site search

Issue 22, 2014
Previous Article Next Article

Nitrogen and sulfur co-doped carbon dots with strong blue luminescence

Author affiliations

Abstract

Sulfur-doped carbon dots (S-CDs) with a quantum yield (QY) of 5.5% and nitrogen, sulfur co-doped carbon dots (N,S-CDs) with a QY of 54.4% were synthesized, respectively, via the same hydrothermal route using α-lipoic acid as the carbon source. The obtained S-CDs and N,S-CDs had similar sizes but different optical features. The QY of N,S-CDs was gradually enhanced when extending the reaction time to increase the nitrogen content. After careful characterization of these CDs, the doped nitrogen element was believed to be in the form of C[double bond, length as m-dash]N and C–N bonds which enhanced the fluorescence efficiency significantly. Meanwhile, the co-doped sulfur element was found to be synergistic for nitrogen doping in N,S-CDs. The optimal N,S-CDs were successfully employed as good multicolor cell imaging probes due to their fine dispersion in water, excitation-dependent emission, excellent fluorescence stability and low toxicity. Besides, such N,S-CDs showed a wide detection range and excellent accuracy as fluorescent sensors for Fe3+ ions.

Graphical abstract: Nitrogen and sulfur co-doped carbon dots with strong blue luminescence

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Jul 2014, accepted on 13 Sep 2014 and first published on 09 Oct 2014


Article type: Paper
DOI: 10.1039/C4NR04267K
Author version
available:
Download author version (PDF)
Citation: Nanoscale, 2014,6, 13817-13823
  •   Request permissions

    Nitrogen and sulfur co-doped carbon dots with strong blue luminescence

    H. Ding, J. Wei and H. Xiong, Nanoscale, 2014, 6, 13817
    DOI: 10.1039/C4NR04267K

Search articles by author

Spotlight

Advertisements