Engineering surface states of carbon dots to achieve controllable luminescence for solid-luminescent composites and sensitive Be2+ detection


Luminescent carbon dots (L-CDs) with high quantum yield value (44.7%) and controllable emission wavelengths were prepared via a facile hydrothermal method. Importantly, the surface states of the materials could be engineered so that their photoluminescence was either excitation-dependent or distinctly independent. This was achieved by changing the density of amino-groups on the L-CD surface. The above materials were successfully used to prepare multicolor L-CDs/polymer composites, which exhibited blue, green, and even white luminescence. In addition, the excellent excitation-independent luminescence of L-CDs prepared at low temperature was tested for detecting various metal ions. As an example, the detection limit of toxic Be2+ ions, tested for the first time, was as low as μM.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. The images in this article are included in the article's Creative Commons license, unless indicated otherwise in the image credit; if the image is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the image. To view a copy of this license, visit Funding: National Basic Research Program of China (2014CB931700), NSFC (61222403, 11274173), the Doctoral Program Foundation of China (20123218110030), and the Opened Fund of the State Key Laboratory on Integrated Optoelectronics (IOSKL2012KF06). Supplementary Information available online on journal website.
Uncontrolled Keywords: General
Full Text Link: http://www.natu ... /srep04976.html
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2014-05-15
Authors: Li, Xiaoming
Zhang, Shengli
Kulinich, Sergei A. (ORCID Profile 0000-0002-1365-9221)
Liu, Yanli
Zeng, Haibo


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