The fluorescence mechanism of carbon dots, and methods for tuning their emission color: a review

Yan, Fanyong; Sun, Zhonghui; Zhang, Hao; Sun, Xiaodong; Jiang, Yingxia; Bai, Zhangjun

doi:10.1007/s00604-019-3688-y

Cited by 332 publications

(271 citation statements)

References 141 publications

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“…All the observed C-dots were composed of multiple layers of graphene as determined by the analysis of electron diffraction patterns (see Figure 3). Similar carbonic nanostructures have been found in other studies using alternative top-down or bottom-up synthetic methods (see References [40,79] and citations therein). Some of the C-dots, which possessed an onion-like shape, exhibited an amorphous carbon shell.…”

Section: Going Deeper Into Nanocarbon Structures and Their Formationsupporting

confidence: 85%

Excitons in Carbonic Nanostructures

Demchenko

2019

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Unexpectedly bright photoluminescence emission can be observed in materials incorporating inorganic carbon when their size is reduced from macro–micro to nano. At present, there is no consensus in its understanding, and many suggested explanations are not consistent with the broad range of experimental data. In this Review, I discuss the possible role of collective excitations (excitons) generated by resonance electronic interactions among the chromophore elements within these nanoparticles. The Förster-type resonance energy transfer (FRET) mechanism of energy migration within nanoparticles operates when the composing fluorophores are the localized electronic systems interacting at a distance. Meanwhile, the resonance interactions among closely located fluorophores may lead to delocalization of the excited states over many molecules resulting in Frenkel excitons. The H-aggregate-type quantum coherence originating from strong coupling among the transition dipoles of adjacent chromophores in a co-facial stacking arrangement and exciton transport to emissive traps are the basis of the presented model. It can explain most of the hitherto known experimental observations and must stimulate the progress towards their versatile applications.

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Section: Going Deeper Into Nanocarbon Structures and Their Formationsupporting

confidence: 85%

Excitons in Carbonic Nanostructures

Demchenko

2019

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“…[127][128][129][130][131] There are characterized by the following properties: quasi-spherical shape with lateral dimension smaller than 10 nm, amorphous structure-dominantly composed of sp 3 hybridized carbon, good chemical stability, tunable photoluminescence and optical band gap, resistance to photo-bleaching and low cytotoxicity under ambient light conditions. [132][133][134][135][136][137][138][139][140][141][142][143][144] Graphene quantum dots (GQDs) are photoactive nanomaterials produced by top down method from graphite or carbon nanotubes. [145][146][147][148][149] They have disk like shape with average diameter in the range of 2-20 nm and are composed mainly of sp 2 hybridized carbon and because of that are more crystalline.…”

Section: O N L I N E F I R S Tmentioning

confidence: 99%

Self-assembly of carbon based nanoparticles films by Langmuir-Blodgett method

Stanković

Todorovic-Markovic

Marković

2020

JSCS

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It must be stressed that the manuscript still has to be subjected to copyediting, typesetting, English grammar and syntax corrections, professional editing and authors' review of the galley proof before it is published in its final form. Please note that during these publishing processes, many errors may emerge which could affect the final content of the manuscript and all legal disclaimers applied according to the policies of the Journal.

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“…Наибольший интерес проявляется к исследованиям оптических свойств УТ, так как в основе многих их применений лежат люминесцентные свойства (см. обзоры [5][6][7]).…”

Section: Introductionunclassified

Люминесцентные Свойства Углеродных Наноточек На Поверхности Сферического Микрорезонатора

Еуров¹,

Стовпяга²,

Курдюков³

et al. 2020

Физика Твердого Тела

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Hybrid structures were synthesized from monodisperse spherical silica particles, which are spherical microcavities, and emitting carbon nanodots on their surface. Carbon nanodots are attached to the surface of the particles by controlled coagulation in three solvents: ammonia, hydrochloric acid and glycerol. Intense narrow lines associated with the emission of nanodots in the whispering gallery modes of a spherical microcavity were observed in the photoluminescence spectra of hybrid structures over the entire radiation wavelength range of carbon nanodots from UV to near IR. All observed lines were identified by comparison with the spectral positions of the whispering gallery modes calculated by the method of spherical wave transfer matrices.

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The fluorescence mechanism of carbon dots, and methods for tuning their emission color: a review

Cited by 332 publications

References 141 publications

Excitons in Carbonic Nanostructures

Excitons in Carbonic Nanostructures

Self-assembly of carbon based nanoparticles films by Langmuir-Blodgett method

Люминесцентные Свойства Углеродных Наноточек На Поверхности Сферического Микрорезонатора

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