Green and fast synthesis of amino-functionalized graphene quantum dots with deep blue photoluminescence
作者: E. BlancoG. BlancoJ. M. Gonzalez-LealM. C. BarreraM. DomínguezM. Ramirez-del-Solar
作者单位: 1University of Cádiz
刊名: Journal of Nanoparticle Research, 2015, Vol.17 (5)
来源数据库: Springer Nature Journal
DOI: 10.1007/s11051-015-3024-3
关键词: Graphene quantum dotsLuminescenceUltrasoundsMicrowaveRamanUp-conversion
英文摘要: Abstract(#br)Graphene quantum dots (GQDs) were prepared using a top-down approach with a green microwave-assisted hydrothermal synthesis from ultrathin graphite, previously ultrasound delaminated. Results obtained by transmission electron microscopy and atomic force microscopy indicate that the so-fabricated GQDs are plates with 6 nm of average diameter, mostly single- or bi-layered. Photoluminescence characterization shows that the strongest emission occurs at 410–415 nm wavelength when the samples are excited at 310–320 nm wavelength. In addition to these down-conversion features, GQDs also exhibit up-conversion photoluminescence when excited in the range 560–800 nm wavelength, with broad emission peaks at 410–450 nm wavelength. Analysis of X-ray photoelectron spectroscopy measurements...
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影响因子:2.175 (2012)

  • quantum 量子
  • synthesis 合成
  • amino 氨基