Etching single-wall carbon nanotubes into green and yellow single-layer graphene quantum dots

Dong, Yongqiang; Pang, Haijun; Ren, Shuyan; Chen, Congqiang; Chi, Yuwu; Yu, Ting

doi:10.1016/j.carbon.2013.07.059

Cited by 115 publications

(73 citation statements)

References 24 publications

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“…8a). Dong et al [78] oxidized SWCNTs with 8 M HNO 3 for 24 h, then deoxidized hydrothermally in pure water at 200°C for 12 h. A large quantities of ultrafine pieces have formed through the similar mechanism proposed in Pan's work (Fig. 8b).…”

Section: Hydrothermal/solvothermal Cuttingmentioning

confidence: 78%

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Dong

Jian-Hua

Chi

2016

Carbon Nanoparticles and Nanostructures

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Carbon based dots (CDs) composed of sp 2 carbon structures and surface functional groups are a new kind of carbon nanomaterials, exhibiting unique luminescent properties due to the quantum confinement and edge effects. This chapter introduces CDs in detail from their synthetic strategies, morphological and structural characteristics, luminescent properties and mechanisms, and sensing applications. The synthesis methods are summarized as "top-down" and "bottomup" approaches. Luminescent properties discussed include photoluminescence, upconversion luminescence, chemiluminescence, electrochemiluminescence. Sensing applications mainly refer to the chemical and biological sensors based on the luminescent properties of CDs. This chapter provides an overview of the research field and gives future perspectives for developing the exciting materials.

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Section: Hydrothermal/solvothermal Cuttingmentioning

confidence: 78%

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Dong

Jian-Hua

Chi

2016

Carbon Nanoparticles and Nanostructures

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“…38 The carbonaceous materials may be carbon fibers, 7 graphene, 30 GO, 39 graphite, 37,[40][41][42][43]44 carbon black, 45 carbon nanotubes, 46,47 coal. 48 Here, we summarize the top-down synthesis of GQDs and the related cutting mechanisms.…”

Section: Top-down Strategiesmentioning

confidence: 99%

“…Chemical oxidation is widely used to synthesize GQDs (Figure 3(D)). This method highly depends on different carbon sources, such as carbon fibers, 47 coal, 18 carbon nanotubes, 46 graphite 41 and carbon black 45 in the mixture of strong acids (sulfuric acid and nitric acid). The carbon sources typically contain graphene sheets.…”

Section: Top-down Strategiesmentioning

confidence: 99%

Properties and Synthesis Strategies of Graphene Quantum Dots

Zhang¹,

Lu²

2017

Frontiers in Nanobiomedical Research

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Quantum dots (QDs) are usually referred to as semiconductor nanoparticles with their sizes in the quantum-confined regime, in which the excitons are confined in all the three spatial dimensions. Typical QDs are inorganic semiconductor nanocrystals from the group II-VI elements in the periodic table. However, the applications of these QDs are limited by their internal disadvantages, including intrinsic toxicity (e.g. in the case of widely studied CdSe QDs) and problems caused by the colloidal stability. Therefore, developing new QDs and relevant nanomaterials is necessary. Consequently, graphene quantum dots (GQDs), a class of zero-dimensional (0D) graphitic nanomaterials, have attracted increasing attention recently. Compared with semiconductor QDs, GQDs are superior in terms of low cytotoxicity, high dispersity in water and some polarity organic solvents, resistance to photobleaching and biocompatibility. In addition, the properties of GQDs are easier to be tuned through surface chemistry, indicating that researchers can design GQDs with various functionalities for different applications.

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“…A distinct advantage of GQDs is that they can be produced in bulk based on the chemical oxidation of carbon-rich sources such as coal [12•] , carbon black [13] , graphite [14] , carbon fibers (CF) [15] , CNT [16] and fullerenes [17] . Alternatively, electrooxidation of CNTs [18] and graphite [19] leads to the formation of hydroxyl and oxygen radicals (produced by the electrolysis of the solvent) that attack the honeycomb lattice on defect and edge sites, facilitating the release of GQDs.…”

Section: The Graphitic Structurementioning

confidence: 99%

Graphene quantum dots: In the crossroad of graphene, quantum dots and carbogenic nanoparticles

Kelarakis

2015

Current Opinion in Colloid & Interface Science

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The scientific and technological importance of graphene quantum dots (GQDs) is directly related to their nanoscopic nature that endows remarkable photo-physical properties and colloidal stability in a variety of solvents. GQDs combine characteristics arising from their graphitic structure, their carbogenic origin and their quantum nature. They are considered as the environmentally benign alternatives of heavy metal based quantum dots, given that not only are they synthesized following green strategies, but they also exhibit minimal toxicity. GQDs are systematically explored in printing, energy harvesting, bioimaging, catalysis, optoelectronics and sensing applications.

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Etching single-wall carbon nanotubes into green and yellow single-layer graphene quantum dots

Cited by 115 publications

References 24 publications

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Carbon Based Dots and Their Luminescent Properties and Analytical Applications

Properties and Synthesis Strategies of Graphene Quantum Dots

Graphene quantum dots: In the crossroad of graphene, quantum dots and carbogenic nanoparticles

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