Journal ArticleDOI
The emission wavelength dependent photoluminescence lifetime of the N-doped graphene quantum dots
Xingxia Deng,Xingxia Deng,Jing Sun,Siwei Yang,Hao Shen,Wei Zhou,Jian Lu,Guqiao Ding,Zhongyang Wang,Zhongyang Wang +9 more
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TLDR
In this article, aromatic nitrogen doped graphene quantum dots were investigated by steady-state and time-resolved photoluminescence (PL) techniques and the lifetime was found to be dependent on the emission wavelength and coincident with the PL spectrum.Abstract:
Aromatic nitrogen doped graphene quantum dots were investigated by steady-state and time-resolved photoluminescence (PL) techniques. The PL lifetime was found to be dependent on the emission wavelength and coincident with the PL spectrum, which is different from most semiconductor quantum dots and fluorescent dyes. This result shows the synergy and competition between the quantum confinement effect and edge functional groups, which may have the potential to guide the synthesis and expand the applications of graphene quantum dots.read more
Citations
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Recent Advances on Graphene Quantum Dots: From Chemistry and Physics to Applications
TL;DR: The differences between G QDs and other nanomaterials, including their nanocarbon cousins, are emphasized, and the unique advantages of GQDs for specific applications are highlighted.
Journal ArticleDOI
Graphene quantum dots from chemistry to applications
TL;DR: GQDs are considered new kind of quantum dots (QDs), as they are chemically and physically stable because of its intrinsic inert carbon property as discussed by the authors, and they are environmentally friendly due to its non-toxic and biologically inert properties.
Journal ArticleDOI
Photo-and Electroluminescence from Nitrogen-Doped and Nitrogen–Sulfur Codoped Graphene Quantum Dots
Tanvir Hasan,Roberto Gonzalez-Rodriguez,Conor Ryan,Nicolas Faerber,Jeffery L. Coffer,Anton V. Naumov +5 more
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Graphene quantum dots: multifunctional nanoplatforms for anticancer therapy
TL;DR: Recent advances in the study of the application of GQDs as nanoplatforms for anticancer therapy are reviewed, taking into account the methods used for their synthesis and functionalization procedures, which can deeply affect their biocompatibility and their electronic and optical features.
Journal ArticleDOI
Green, Rapid, and Universal Preparation Approach of Graphene Quantum Dots under Ultraviolet Irradiation
Jinli Zhu,Yanfeng Tang,Gang Wang,Gang Wang,Mao Jiarong,Zhiduo Liu,Tongming Sun,Miao Wang,Da Chen,Yucheng Yang,Jipeng Li,Yuan Deng,Siwei Yang +12 more
TL;DR: A new green, rapid, and universal preparation approach for graphene quantum dots via the free-radical polymerization of oxygen-containing aromatic compounds under ultraviolet irradiation is introduced, which had a high yield (86%), and the byproducts are only H2O and CO2.
References
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Journal ArticleDOI
Electric Field Effect in Atomically Thin Carbon Films
Kostya S. Novoselov,Andre K. Geim,Sergey V. Morozov,Da Jiang,Y. Zhang,S. V. Dubonos,Irina V. Grigorieva,A. A. Firsov +7 more
TL;DR: Monocrystalline graphitic films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands and they exhibit a strong ambipolar electric field effect.
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The rise of graphene
TL;DR: Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be mimicked and tested in table-top experiments.
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Graphene: Status and Prospects
TL;DR: This review analyzes recent trends in graphene research and applications, and attempts to identify future directions in which the field is likely to develop.
Journal ArticleDOI
Hydrothermal route for cutting graphene sheets into blue-luminescent graphene quantum dots
TL;DR: This work reports on a novel and simple hydrothermal approach for the cutting of GSs into surface-functionalized GQDs, which were found to exhibit bright blue photoluminescence (PL), which has never been observed in GSs and GNRs owing to their large lateral sizes.
Journal ArticleDOI
Chaotic Dirac billiard in graphene quantum dots.
Leonid Ponomarenko,Fred Schedin,Mikhail I. Katsnelson,R. Yang,Ernie W. Hill,Kostya S. Novoselov,A. K. Geim +6 more
TL;DR: This work reports on electron transport in quantum dot devices carved entirely from graphene, demonstrating the possibility of molecular-scale electronics based on graphene.
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