期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 20, 期 15, 页码 4246-4250出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201304358
关键词
carbon dots; luminescence; microreactors; reaction mechanisms; tunable emission
资金
- Natural Science Foundation of China [21277149]
- Zhejiang Provincial Natural Science Foundation of China [LR13B050001]
- Starting Research Fund of Team Talent from NIMTE [Y20402A03]
A microreactor is applied and reported, for the first time, in the field of research of carbon dots (CDs), including rapid screening of the reaction conditions and investigation of the photoluminescence (PL) mechanism. Various carbonaceous precursors and solvents were selected and hundreds of reaction conditions were screened (ca. 15min on average per condition). Through analyzing the screened conditions, tunable PL emission maxima, from about 330 to 550nm with respectable PL quantum yields, were achieved. Moreover, the relationship between different developmental stages of the CDs and the PL properties was explored by using the microreactor. The PL emission was observed to be independent of the composition, carbonization extent, and morphology/size of the CDs. This study unambiguously presents that a microreactor could serve as a promising tool for the research of CDs.
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