Endowing Carbon Dots with Long‐Lived Phosphorescence Emission in Aqueous Solutions

Advanced Functional Materials, Год журнала: 2023, Номер 34(7)

Опубликована: Ноя. 3, 2023

Abstract Room temperature phosphorescent carbon dots (RTP CDs) have received increasing attention in recent years due to their outstanding optical properties and potential applications. It is worth noting that RTP CDs aqueous solution inspired special interests because of low toxicity, long lifetime, ability avoid autofluorescence background fluorescence, exhibiting wide application prospects time‐resolved biological imaging sensing. However, achieving solutions remains a considerable challenge water molecules oxygen can cause the deactivation triplet‐state excitons, resulting phosphorescence quenching. Several strategies been proposed counter problem including encapsulated rigid matrix, hydrogen bonding, covalent bonding fixation. Consequently, more significant number materials with excellent stability, multicolor are successfully obtained. Herein, development as well corresponding fabricated luminescence mechanism detailly summarized reviewed. Furthermore, various applications water‐phase information security, sensing, bioimaging, light‐emitting diodes, fingerprinting also discussed. Finally, an outlook on proposed.

Язык: Английский

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Carbon dots for long-term near-infrared afterglow imaging and photodynamic therapy

Chemical Engineering Journal, Год журнала: 2023, Номер 467, С. 143384 - 143384

Опубликована: Май 9, 2023

Язык: Английский

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Amide (n, π*) Transitions Enabled Clusteroluminescence in Solid‐State Carbon Dots

Advanced Functional Materials, Год журнала: 2023, Номер 33(37)

Опубликована: Май 23, 2023

Abstract Carbon dots (CDs) demonstrate great superiority in optoelectronic devices due to their tunable emission and photobleaching resistance properties. Although the fluorescence of CDs solution has been extensively studied, solid‐state (SSF) mechanism still remains largely unexplored experimentally. Herein, fluorescent with unique clusteroluminescence (CL) generated from clusterization‐triggered are designed based on condensation between precursors carboxyl amino groups. The obvious concentration‐dependent quench‐resistant SSF, which is attributed activation amide (n, π *) transition by clusterization process. This sub‐luminophore non‐luminescent at long wavelengths isolated state, while it induces photoluminescence redshift via through‐space interaction aggregated state. Besides, SSF can be tuned quenched quenching‐resistant through formation, dominant center solids switchable surface edge state passivation. Based long‐wavelength CL feature, high‐purity red light‐emitting diode exhibiting 656‐nm warm light fabricated Commission Internationale de l´Eclairage (CIE) coordinates (0.66, 0.34) unchanged wavelength under different driving currents. These findings provide novel insights into a universal strategy construct materials tailored

Язык: Английский

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Long-lived room-temperature phosphorescent complex of B, N, P co-doped carbon dots and silica for afterglow imaging

Sensors and Actuators B Chemical, Год журнала: 2023, Номер 390, С. 133946 - 133946

Опубликована: Май 6, 2023

Язык: Английский

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Hour‐Level Persistent Multicolor Phosphorescence Enabled by Carbon Dot‐Based Nanocomposites Through a Multi‐Confinement‐Based Approach

Small, Год журнала: 2023, Номер 20(23)

Опубликована: Дек. 21, 2023

Abstract Hour‐level persistent room temperature phosphorescence (RTP) phenomena based on multi‐confinement carbon dots (CDs) are reported. The CDs‐based system reported here (named Si‐CDs@B 2 O 3 ) can be efficiently synthesized by a simple pyrolysis method compared to the established RTP systems. binding modes of CDs, silica (SiO ), and boron oxide (B deduced from series characterizations including XRD, FT‐IR, TEM characterization. Further studies show that formation covalent bonds between B , SiO CDs play key role in activating preventing its quenching. This is rare example exhibits hourly under environmental conditions. Finally, applications demonstrated for anti‐counterfeiting, long‐duration imaging, fingerprinting. synthetic strategy expected provide strong technical support preparation pave way synthesis future.

Язык: Английский

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Centralized Excited States and Fast Radiation Transitions Reduce Laser Threshold in Carbon Dots

Small, Год журнала: 2023, Номер 19(24)

Опубликована: Фев. 26, 2023

As a new type of solution-processed nano-laser material, carbon dots (CDs) have shown considerable potential in optical communication, laser displays, micro/nano processing, and biomedicine. Reducing the threshold gain material is significance for further development CDs' applications field lasers. A series blue-emissive CDs (B-CDs) are synthesized by changing molar ratios precursors (citric acid (CA): L-Cysteine (L-Cys)). B-CDs structure nanoparticles with their surface being modified 5-oxo-3,5-dihydro-2Hthiazolo [3,2-a]pyridine-7-carboxylic (TPCA). The can only be generated when ratio between 1:1 2:1. With an increase this ratio, decreases from 341.6 to 165.5 mJ cm-2 . decrease attributed radiation transition rate centralized sp3 -related excited state levels, which favorable light amplification population inversion. These results will instructional reasonably design CDs-based materials prompt use practical photonics.

Язык: Английский

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Novel strategy of multidimensional information encryption via multi-color carbon dots aggregation-induced emission

Nano Research, Год журнала: 2024, Номер 17(6), С. 5680 - 5687

Опубликована: Март 4, 2024

Язык: Английский

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Mesoporous collapsing encapsulated carbon dots: Direct evidence for the effect of multiple-confined interactions of silica on efficient long-lived phosphorescence

Chemical Engineering Journal, Год журнала: 2024, Номер 486, С. 150436 - 150436

Опубликована: Март 16, 2024

Язык: Английский

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Symmetry‐Triggered Tunable Phosphorescence Lifetime of Graphene Quantum Dots in a Solid State

Advanced Materials, Год журнала: 2024, Номер 36(21)

Опубликована: Фев. 14, 2024

Abstract Studying the phosphorescent mechanisms of carbon nanostructures synthesized by “bottom‐up” approach is key to understanding structure modulation and interfacial properties nanostructures. In this work, relationships among symmetry precursors in synthesis, structures products, phosphorescence lifetimes graphene quantum dots (GQDs) are studied. The matching formation a D 6h graphene‐like framework considered factor controlling separability sp 2 domains GQDs. As GQDs increases, (14.8–125.5 ms) solid state can be tuned. Machine learning used define degree disorder ( S ) GQD structure, which quantitatively describes different space groups precursors. negative correlation between oscillator strength uncovered. Therefore, recognized as reflective structure. Finally, based on correlations found GQDs, with an ultralong lifetime (28.5 s) obtained. Moreover, visible emission (435–618 nm) synthesized.

Язык: Английский

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Unveiling the photoluminescence mechanisms of carbon dots through tunable near-infrared dual-wavelength lasing

Matter, Год журнала: 2024, Номер 7(10), С. 3518 - 3536

Опубликована: Июль 2, 2024

Язык: Английский

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