Deep ultraviolet photoluminescence of water-soluble self-passivated graphene quantum dots.

  title={Deep ultraviolet photoluminescence of water-soluble self-passivated graphene quantum dots.},
  author={Libin Tang and Rong-bin Ji and Xian-an Cao and Jingyu Lin and Hongxing Jiang and Xueming Li and Kar Seng Teng and Chi Man Luk and Songjun Zeng and Jianhua Hao and Shu Ping Lau},
  journal={ACS nano},
  volume={6 6},
  • L. Tang, R. Ji, S. Lau
  • Published 10 May 2012
  • Materials Science, Physics, Chemistry
  • ACS nano
Glucose-derived water-soluble crystalline graphene quantum dots (GQDs) with an average diameter as small as 1.65 nm (∼5 layers) were prepared by a facile microwave-assisted hydrothermal method. The GQDs exhibits deep ultraviolet (DUV) emission of 4.1 eV, which is the shortest emission wavelength among all the solution-based QDs. The GQDs exhibit typical excitation wavelength-dependent properties as expected in carbon-based quantum dots. However, the emission wavelength is independent of the… 

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