Luminescent graphene quantum dots as new fluorescent materials for environmental and biological applications

Lin, Liping; Rong, Mingcong; Luo, Feng; Chen, Dongmei; Wang, Yiru; Chen, Xi

doi:10.1016/j.trac.2013.11.001

Cited by 316 publications

(147 citation statements)

References 76 publications

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“…Recently, luminescent GQDs, one type of zero dimensional graphene sheets with lateral size less than 100 nm, have attracted researchers because of their robust biological and chemical inertness, tunable luminescence emission, low cytotoxicity and excellent biocompatibility, and resistance to photobleaching [26,27]. Meanwhile, both theoretical study and experimental results have proved that heteroatom doped GQDs can offer more active sites and effectively modulate their intrinsic physicochemical properties including electronic characteristics, surface and local chemical features, resulting in many new performances and applications [28,29].…”

Section: Introductionmentioning

confidence: 99%

Intrinsic peroxidase-like catalytic activity of nitrogen-doped graphene quantum dots and their application in the colorimetric detection of H2O2 and glucose

Lin

Song

Chen

et al. 2015

Analytica Chimica Acta

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253

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Section: Introductionmentioning

confidence: 99%

Intrinsic peroxidase-like catalytic activity of nitrogen-doped graphene quantum dots and their application in the colorimetric detection of H2O2 and glucose

Lin

Song

Chen

et al. 2015

Analytica Chimica Acta

Self Cite

253

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“…Recently graphene quantum dots (GQDs), as new kinds of nanocarbon based materials have gained tremendous attention owning to their good electronic and optical properties [6][7][8]. GQDs are zero-dimensional materials with unique properties such as good quantum confinement, superior luminescent, good photostability, excellent chemical stability, high biocompatibility, low toxicity, high aqueous solubility, good electrical conductivity and high thermal conductivity [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Rapid and facile synthesis of graphene oxide quantum dots with good linear and nonlinear optical properties

Sakho

Oluwafemi

Perumbilavil

et al. 2016

J Mater Sci: Mater Electron

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We herein report a rapid and effective method for the synthesis of graphene oxide quantum dots (GOQDs) with excellent linear and nonlinear optical properties. The GOQDs were prepared by chemical cutting of graphite oxide and characterized using Fourier transform infrared spectroscopy, X-ray diffraction, UV-Vis absorption spectroscopy, Raman spectroscopy and transmission electron microscopy. The Commission International de l'É clairage 1931 chromaticity coordinates for GOQDs (x = 0.21, y = 0.23) demonstrated that highly pure blue-light emission was achieved upon 330 nm excitation wavelength. Optical nonlinearity measurements conducted at 532 nm using 5 ns laser pulses indicated saturable absorption behavior, which tends to the onset of reverse saturable absorption as the input light fluence was increased.

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“…Carbon nanoclusters are also to be considered as a possible source of visible light emission. Recently, it was demonstrated that nanosized carbon particles in the form of 3D nanodots, 2D graphene nanodots and 2D-3D graphene oxide (GO) nanodots synthesized under proper conditions exhibit an effective visible photoluminescence with the decay time of the order of several nanoseconds [46][47][48].…”

Section: Resultsmentioning

confidence: 99%

Photoluminescent properties of oxidized stochiometric and carbon-rich amorphous Si1-xCx:H films

Vasin¹

2015

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Near-stochiometric and carbon-rich a-Si 1−x C x :H thin films were deposited using the magnetron sputtering of Si target in Ar/CH 4 gas mixture. As-deposited nearstochimetric (x = 0.5) sample showed weak blue photoluminescence (PL), while PL of as-deposited carbon-rich (x = 0.7) sample was 20 times stronger and white in color. The films were annealed in pure argon, wet argon, and dry oxygen at 450 °C for 30 min. The intensity of PL in a-Si 1−x C x :H layers were enhanced by the factor from 2 to 12 after annealing in dependence on the annealing atmosphere. The strongest oxidation and strongest light emission were observed in carbon-rich series (x = 0.7) after annealing in oxidizing atmosphere. Structural properties of the films were characterized by infra-red absorption spectroscopy, ellipsometry and electron paramagnetic resonance. The effect of carbon enrichment of a-Si 1−x C x :H films and annealing atmosphere on the evolution of photoluminescence and local interatomic bonding structure in annealed material were studied and analyzed. It has been found that main effects of thermal treatments is strong enhancement of photoluminescence accompanied by formation of Si:C-H n and Si-O x C y bonding. The strongest oxidation effect as well as strongest photoluminescence were observed in carbon-rich a-SiC:H films.

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Luminescent graphene quantum dots as new fluorescent materials for environmental and biological applications

Cited by 316 publications

References 76 publications

Intrinsic peroxidase-like catalytic activity of nitrogen-doped graphene quantum dots and their application in the colorimetric detection of H2O2 and glucose

Intrinsic peroxidase-like catalytic activity of nitrogen-doped graphene quantum dots and their application in the colorimetric detection of H2O2 and glucose

Rapid and facile synthesis of graphene oxide quantum dots with good linear and nonlinear optical properties

Photoluminescent properties of oxidized stochiometric and carbon-rich amorphous Si1-xCx:H films

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