The light of carbon dots: From mechanism to applications

Matter, Год журнала: 2022, Номер 5(1), С. 110 - 149

Опубликована: Янв. 1, 2022

Язык: Английский

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The synthetic strategies, photoluminescence mechanisms and promising applications of carbon dots: Current state and future perspective

Carbon, Год журнала: 2021, Номер 186, С. 91 - 127

Опубликована: Окт. 11, 2021

Язык: Английский

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The Emerging Development of Multicolor Carbon Dots

Small, Год журнала: 2022, Номер 18(51)

Опубликована: Ноя. 3, 2022

Abstract As a relatively new type of fluorescent carbon‐based nanomaterials, multicolor carbon dots (MCDs) have attracted much attention because their excellent biocompatibility, tunable photoluminescence (PL), high quantum yield, and unique electronic physicochemical properties. The emission characteristics (CDs) obviously depend on the source precursor, reaction conditions, environment, which directly or indirectly determines CDs. Therefore, this review is first systematic classification summary multiple regulation methods synthetic MCDs reviews recent research progress in synthesis from variety precursor materials such as aromatic molecules, small organic natural biomass, focusing how different produce corresponding MCDs. This also introduces innovative applications fields biological imaging, light‐emitting diodes (LEDs), sensing, anti‐counterfeiting due to PL It hoped that by selecting appropriate adjustment methods, can inspire guide future design tailored MCDs, provide help for development multifunctional

Язык: Английский

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Electron–phonon coupling-assisted universal red luminescence of o-phenylenediamine-based carbon dots

Light Science & Applications, Год журнала: 2022, Номер 11(1)

Опубликована: Июнь 6, 2022

Abstract Due to the complex core–shell structure and variety of surface functional groups, photoluminescence (PL) mechanism carbon dots (CDs) remain unclear. o-Phenylenediamine (oPD), as one most common precursors for preparing red emissive CDs, has been extensively studied. Interestingly, emission CDs based on oPD have similar PL characteristics. Herein, we prepared six different oPD-based found that they had almost same absorption spectra after purification. Structural spectral characterization indicated core structures but polymer shells. Furthermore, single-molecule spectroscopy confirmed multi-modal those originated from transitions vibrational energy levels center in core. In addition, phenomenon “spectral splitting” single-particle was observed at low temperature, which these were unique materials with properties both organic molecules quantum dots. Finally, theoretical calculations revealed their potential polymerization mode structure. Moreover, proposed red-emitting precursors; is, regulates emission, shell intensity. Our work resolves controversy CDs. These findings provide a general guide exploration structural analysis other types

Язык: Английский

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Green Synthesis of Tunable Fluorescent Carbon Quantum Dots from Lignin and Their Application in Anti-Counterfeit Printing

ACS Applied Materials & Interfaces, Год журнала: 2021, Номер 13(47), С. 56465 - 56475

Опубликована: Ноя. 16, 2021

Lignin converted to carbon quantum dots (CQDs) attracts tremendous attention for large-scale production of nanomaterials and value-added disposal biomass wastes (such as the black liquor from pulping industry residue hydrolysis biomass). The green synthesis lignin-derived CQDs is reported via a facile two-step method with adjustment acid additives containing N or S. resulting series exhibit bright fluorescence in gradient colors blue yellowish green, among which N, S co-doped addition 2,4-diaminobenzene sulfonic show an optimal yield (QY) 30.5%. red-shift photoluminescence emission behaviors these can be attributed increased graphitization degree reduced optical energy band gaps (2.47 → 2.17 eV) regard incorporation various heteroatoms. improved QYs are consistent variation trend N/C content CQDs. green-emissive fluorescence, strong water solubility, excellent chemical stability perform well anti-counterfeiting printing. promising sustainable approach tunable fluorescent exhibits utilization lignin ink production.

Язык: Английский

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Photoluminescence mechanisms of red-emissive carbon dots derived from non-conjugated molecules

Science Bulletin, Год журнала: 2022, Номер 67(14), С. 1450 - 1457

Опубликована: Июнь 18, 2022

Язык: Английский

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Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Chemical Reviews, Год журнала: 2023, Номер 123(18), С. 11047 - 11136

Опубликована: Сен. 7, 2023

Advances in nanotechnology and nanomaterials have attracted considerable interest play key roles scientific innovations diverse fields. In particular, increased attention has been focused on carbon-based exhibiting extended structures unique properties. Among these materials, zero-dimensional structures, including fullerenes, carbon nano-onions, nanodiamonds, dots, possess excellent bioaffinities superior fluorescence properties that make suitable for application to environmental biological sensing, imaging, therapeutics. This review provides a systematic overview of the classification structural properties, design principles preparation methods, optical sensing applications nanomaterials. Recent interesting breakthroughs sensitive selective imaging heavy metal pollutants, hazardous substances, bioactive molecules as well information encryption, super-resolution photoacoustic phototherapy nanomedicine delivery are main focus this review. Finally, future challenges prospects materials highlighted envisaged. presents comprehensive basis directions designing, developing, applying fascinating fluorescent sensors fabricated based specific requirements numerous research

Язык: Английский

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Light of carbon: Recent advancements of carbon dots for LEDs

Nano Energy, Год журнала: 2023, Номер 114, С. 108623 - 108623

Опубликована: Июнь 20, 2023

Язык: Английский

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Advances, opportunities, and challenge for full-color emissive carbon dots

Chinese Chemical Letters, Год журнала: 2021, Номер 33(2), С. 613 - 625

Опубликована: Авг. 20, 2021

Язык: Английский

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One‐Step Synthesis of White‐Light‐Emitting Carbon Dots for White LEDs with a High Color Rendering Index of 97

Advanced Science, Год журнала: 2023, Номер 10(12)

Опубликована: Фев. 23, 2023

White-light-emitting carbon dots (WCDs) show innate advantages as phosphors in white light-emitting diodes (WLEDs). For WLEDs, the color rendering index (CRI) is most important metric to evaluate its performance. Herein, WCDs are prepared by a facile one-step solvothermal reaction of trimellitic acid and o-phenylenediamine. It consists four CDs identified column chromatography blue, green, yellow, red, thus light superposition these types light. The mixture undergoes Förster resonance energy transfer induce generation photoluminescence originates from synergistic effect core surface states. Thereinto, states dominate RCDs, increase amide contents degree conjugation promote redshift emission spectra, which further confirmed theoretical calculations. In addition, high CRI 97 achieved when used fabricate almost highest value up now. multicolor LEDs can also be fabricated using phosphors, respectively. This work provides novel approach explore rapid preparation low-cost, high-performance CDs-based WLEDs.

Язык: Английский

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