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Dr. Yongqiang Dong, Dr. Hongchang Pang, Dr. Hong Bin Yang, Dr. Chunxian Guo, Prof. Jingwei Shao, Prof. Yuwu Chi, Prof. Chang Ming Li and Prof. Ting Yu Carbon-Based Dots Co-doped with Nitrogen and Sulfur for High Quantum Yield and Excitation-Independent Emission Angewandte Chemie International Edition 52

Article first published online: 11 JUN 2013 | DOI: 10.1002/anie.201301114

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Helpful elements: A facile bottom-up method using citric acid and L-cysteine as a precursor has been developed to prepare graphene quantum dots (GQDs) co-doped with nitrogen and sulfur. A new type and high density of surface state of GQDs arises, leading to high yields (more than 70 %) and excitation-independent emission. FLQY=fluorescence quantum yield.

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