Practical access to bandgap-like N-doped carbon dots with dual emission unzipped from PANMMA core-shell nanoparticles

As emergent nanolights for bioimaging, catalysis, sensors, and photoelectronics, carbon dots (C-dots) have attracted much research attention. However, the practical and scalable preparation of C-dots has been less explored, even after various top-down and bottom-up approaches being reported recently...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2013-11, Vol.1 (46), p.7731-7735
Main Authors: Wang, Youfu, Dong, Luhua, Xiong, Rulin, Hu, Aiguo
Format: Article
Language:English
Subjects:
Carbon
Emission
Microemulsions
Nanoparticles
Nanostructure
Photoluminescence
Pyrolysis
Transmission electron microscopy
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Summary:As emergent nanolights for bioimaging, catalysis, sensors, and photoelectronics, carbon dots (C-dots) have attracted much research attention. However, the practical and scalable preparation of C-dots has been less explored, even after various top-down and bottom-up approaches being reported recently. To this end, we discover a new approach to prepare C-dots by simply unzipping core-shell polymeric nanoparticles, prepared by a microemulsion polymerization. Uniformly distributed N-doped C-dots are prepared by the pyrolysis of PANMMA core-shell nanoparticles at different temperatures, followed by dialysis. TEM analysis shows that many of the C-dots of 2-3 nm size are unzipped from each polymeric particle. All the purified C-dots show a bandgap-like photoluminescence (PL) behaviour, with dual emission and a stable PL between pH 5-12.
ISSN:2050-7526
2050-7534
DOI:10.1039/c3tc30949e