Fluorescent carbon quantum dots with controllable physicochemical properties fantastic for emerging applications: A review

Carbon Neutralization, Journal Year: 2024, Volume and Issue: 3(2), P. 245 - 284

Published: March 1, 2024

Abstract Carbon quantum dots (CQDs) have emerged as prominent contenders in the realm of luminescent nanomaterials over past decade owing to their tunable optical properties, robust photostability, versatile surface functionalization and doping potential, low toxicity, straightforward synthesis utilizing environmentally friendly precursors. In this review, we commence with a concise introduction, presenting both top‐down bottom‐up strategies for eco‐friendly CQDs. Subsequently, delve into comprehensive examination CQDs' structure characteristics, encompassing ultraviolet–visible absorption confinement effects, state emissions contributing room‐temperature photoluminescence (PL). This review proceeds elucidate recent advancements modification CQDs, specifically focusing on oxidation, passivation, incorporation heteroatoms. These serve afford control physicochemical facilitating enhancement PL through decoration highly visible‐responsive is achieved by suppressing nonradiative recombination electron‐hole pairs, enabling red/blue shifts CQDs generation full‐color emission spectrum, regulating band‐gap states broaden photoabsorption range. Finally, offer an overview most developments applications fluorescent emphasizing utility biomedicine, sensors, lighting, displays, well photocatalysis.

Language: Английский

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Large Scale Synthesis of Carbon Dots and Their Applications: A Review

Molecules, Journal Year: 2025, Volume and Issue: 30(4), P. 774 - 774

Published: Feb. 7, 2025

Carbon dots (CDs), a versatile class of fluorescent carbon-based nanomaterials, have attracted widespread attention due to their exceptional optical properties, biocompatibility, and cost-effectiveness. Their applications span biomedicine, optoelectronics, smart food packaging, yet large-scale synthesis remains significant challenge. This review categorizes methods into liquid-phase (hydrothermal/solvothermal, microwave-assisted, magnetic hyperthermia, aldol condensation polymerization), gas-phase (plasma synthesis), solid-phase (pyrolysis, oxidation/carbonization, ball milling), emerging techniques (microfluidic, ultrasonic, molten-salt). Notably, microwave-assisted solid-state show promise for industrial production scalability efficiency. Despite these advances, challenges persist in optimizing reproducibility, reducing energy consumption, developing purification quality control strategies. Addressing issues will be critical transitioning CDs from laboratory research real-world applications.

Language: Английский

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

Nano Research, Journal Year: 2024, Volume and Issue: 17(6), P. 5680 - 5687

Published: March 4, 2024

Language: Английский

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High‐Efficiency Luminescent Solar Concentrators Based on Carbon Dots with Simultaneously Ultrabright Solid‐State and Liquid‐State Luminescence

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 4, 2024

Abstract Carbon dots (CDs) are ideal fluorophores for optoelectronic devices. However, it is still a great challenge to obtain CDs with high solid‐state photoluminescence quantum yields (PLQYs). In this work, first reported that the barium‐doped (Ba‐CDs), which can be simply synthesized on large scale via direct one‐step heating approach using an open vessel. The as‐synthesized Ba‐CDs exhibit ultrabright luminescence both in liquid and solid states. of 8.6 g per batch show Stokes shift ≈0.68 eV PLQYs 80.8% 66.8% state, respectively. Interestingly, efficient fluorescence enhancement phenomenon occurs when mixed polyvinylpyrrolidone (PVP), reveals critical issue compatibility between polymer matrix well resolved. As proof‐of‐concept, employed as high‐efficiency luminescent solar concentrator (LSC) fabrication. Ba‐CDs@PVP‐based LSC has PLQY 88.78%, showing breakthrough optical conversion efficiency 7.16% power 6.87% under natural light irradiation (40 mW cm −2 ). results demonstrate potential application photovoltaic

Language: Английский

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Hydrogen Bond‐Mediated Self‐Assembly of Carbon Dots Enabling Precise Tuning of Particle and Cluster Luminescence for Advanced Optoelectronic Applications

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

The effective control over the self-assembly process of carbon dots (CDs) and their cluster luminescence in aggregated state is paramount significance challenge. This study, for first time, systematically explores photoluminescent behavior CDs state, which less understood compared to discrete state. By investigating effects concentration solvent environment, it's demonstrated that could exhibit dual emission properties, shifting from blue particle emissions red as they aggregate. key this tunable lies hydrogen bonding, drives modulates photo physical properties. These findings reveal through precise aggregation, can be engineered advanced optoelectronic applications, including light-emitting diodes (LEDs), secure information encryption, fingerprint authentication. report not only deepens understanding underlying mechanisms governing CDs' but also introduces a novel approach exploiting unique properties technological innovation.

Language: Английский

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Designing carbon dots for enhanced photo-catalysis: Challenges and opportunities

Chem, Journal Year: 2024, Volume and Issue: 10(9), P. 2700 - 2723

Published: Aug. 19, 2024

Language: Английский

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Chemical- and green-precursor-derived carbon dots for photocatalytic degradation of dyes

iScience, Journal Year: 2024, Volume and Issue: 27(2), P. 108920 - 108920

Published: Jan. 20, 2024

Rapid industrialization and untreated industrial effluents loaded with toxic carcinogenic contaminants, especially dyes that discharge into environmental waters, have led to a rise in water pollution, substantial adverse impact on marine life humankind. Photocatalytic techniques are one of the most successful methods help degradation and/or removal such contaminants. In recent years, semiconductor quantum dots being substituted by carbon (CDs) as photocatalysts, due ease formation, cost-effectiveness, possible sustainability scalability, much lower toxicity, above all its high capacity harvest sunlight (UV, visible, near infrared) through electron transfer enhances lifetime photogenerated charge carriers. A better understanding between properties CDs their role photocatalytic contaminants is required for formation controllable structures adjustable outcomes. The focus this review composites photocatalysts obtained from different sustainable green well chemical precursors. Apart synthesis, characterization, CDs, study also highlights effect parameters catalytic dye mechanisms detail. Besides present research development field, potential challenges future perspectives presented.

Language: Английский

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3D Film-Like Nanozyme with a Synergistic Amplification Effect for the Ultrasensitive Immunochromatographic Detection of Respiratory Viruses

ACS Nano, Journal Year: 2024, Volume and Issue: 18(37), P. 25865 - 25879

Published: Sept. 2, 2024

Greatly improving the sensitivity and detection range of lateral flow immunoassays (LFAs) by at least 100 times without using additional instruments remains challenging. Herein, we develop a three-dimensional (3D) film-like nanozyme (GO-Pt

Language: Английский

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Preparation of lignin-based full-color carbon quantum dots and their multifunctionalization with waterborne polyurethanes

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 265, P. 130860 - 130860

Published: March 13, 2024

Language: Английский

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Unraveling the synthesis-structure-property relationship in aromatic amino acids-derived carbon dots

Carbon, Journal Year: 2025, Volume and Issue: 235, P. 120073 - 120073

Published: Jan. 30, 2025

Language: Английский

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