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

Xiaoming Li, Shengli Zhang, Sergei A. Kulinich, Yanli Liu, Haibo Zeng*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number4976
Number of pages8
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 15 May 2014

Bibliographical note

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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.

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