Carbon quantum dots: Preparation, optical properties, and biomedical applications

Materials Today Advances, Journal Year: 2023, Volume and Issue: 18, P. 100376 - 100376

Published: May 3, 2023

As an excellent fluorescent nanomaterial, carbon quantum dots (CQDs) have the properties of small molecular weight, particle size, high fluorescence stability, no optical flicker, wide excitation spectrum, continuous, long adjustable emission wavelength, good biocompatibility and low toxicity. At present, it has been widely used in biological detection, vivo vitro imaging, drug delivery diagnostic drugs. This review presents a broad overview recent progress synthesis, properties, biomedical applications CQDs. The synthesis methods CQDs are first introduced, followed by extensive discussion its purification, surface functionalization stability. Furthermore, presented, with emphasis on photoluminescence mechanism relationship between conditions properties. review's much focus is given to CQDs, including imaging (in imaging) (targeted therapy, photodynamic photothermal immunological gene therapy). Finally, we cover key issues future prospects/advances that still deal sector as well possible solutions.

Language: Английский

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The Emerging Development of Multicolor Carbon Dots

Small, Journal Year: 2022, Volume and Issue: 18(51)

Published: Nov. 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

Language: Английский

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Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(18), P. 11047 - 11136

Published: Sept. 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

Language: Английский

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Engineering efficient artificial nanozyme based on chitosan grafted Fe-doped-carbon dots for bacteria biofilm eradication

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 435, P. 128996 - 128996

Published: April 22, 2022

Language: Английский

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Recent advances of solvent-engineered carbon dots: A review

Carbon, Journal Year: 2022, Volume and Issue: 204, P. 76 - 93

Published: Dec. 21, 2022

Language: Английский

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A High Catalytic Activity Nanozyme Based on Cobalt-Doped Carbon Dots for Biosensor and Anticancer Cell Effect

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(51), P. 57206 - 57214

Published: Dec. 14, 2022

Nanozyme technology as an emerging field has been successfully applied to chemical sensing, biomedicine, and environmental monitoring. It is very significant for the advance of this construct nanozymes with high catalytic activity by a simple method develop their multifunctional applications. Here, new type cobalt-doped carbon dots (Co-CDs) was designed using vitamin B12 citric acid precursors. The homogeneous cobalt doping at nuclear led Co-CDs show peroxidase-like resembling natural metalloenzymes. Based on affinity H2O2 (Km = 0.0598 mM), colorimetric sensor glucose detection constructed combining oxidase. On account cascade strategy, good linear relationship obtained from 0.500 200 μM, limit 0.145 μM. biosensor realized accurate in human serum samples. Moreover, could specifically catalyze cancer cells generate variety reactive oxygen species, leading death cells, which useful application potential tumor therapy. In work, adequately exploited, extends multiple biotechnologies, including biosensing, disease diagnosis, treatment.

Language: Английский

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An Overview on Carbon Quantum Dots Optical and Chemical Features

Molecules, Journal Year: 2023, Volume and Issue: 28(6), P. 2772 - 2772

Published: March 19, 2023

Carbon quantum dots are the materials of a new era with astonishing properties such as high photoluminescence, chemical tuneability and biocompatibility. Since their discovery, carbon have been described nanometric high-fluorescent nanoparticles, but this definition has become weaker year after year. Nowadays, classification physical explanation optical structure remain matter debate. In review, we provide clear discussion on these points, providing starting point for rationalization comprehensive view features dots.

Language: Английский

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Multiple Stimuli‐Response Polychromatic Carbon Dots for Advanced Information Encryption and Safety

Small, Journal Year: 2023, Volume and Issue: 19(10)

Published: Jan. 15, 2023

Abstract Optical information encryption and safety have aroused great attention since they are closely correlated to data protection safety. The development of multiple stimuli‐response optical materials for constructing large‐capacity is very important practical applications. Carbon dots (CDs) many gratifying merits, such as polychromatic emission, diverse luminous categories, stable physicochemical properties, considered one the most ideal candidates protection. Herein, carbon core, functional groups, solvents, other crucial factors reviewed outputting emission categories. In particular, substrate engineering strategies been emphasized their critical role in yielding excellent features High‐capacity by relying on rich properties CDs, categories fluorescence, afterglow, upconversion, well external‐stimuli‐assisted changes. Some perspectives preparing CDs further developing security proposed. This review provides a good reference manipulation next‐generation

Language: Английский

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A dual-signal fluorescent colorimetric tetracyclines sensor based on multicolor carbon dots as probes and smartphone-assisted visual assay

Analytica Chimica Acta, Journal Year: 2023, Volume and Issue: 1247, P. 340843 - 340843

Published: Jan. 27, 2023

Language: Английский

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Unveiling Unconventional Luminescence Behavior of Multicolor Carbon Dots Derived from Phenylenediamine

The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(26), P. 5975 - 5984

Published: June 22, 2023

Fluorescence regulation of carbon dots (CDs) during their preparation has become a hot research topic. In this work, multicolor fluorescent CDs with unconventional luminescence behavior are prepared by using o-, m-, or p-phenylenediamine (o-PD, m-PD, p-PD, respectively) and 2,3-dihydroxynaphthalene rich hydroxyl groups as reaction precursors. Tunable bright blue, yellow, red colors can be obtained solvothermal method under the joint action ethanol hydrochloric acid. The fluorescence emission synthesized follows rule o-PD to m-PD p-PD from blue red, which is contrary most previously reported results (the following an order p-PD). Our reveal that differences in polymerization, surface states, functional groups, graphite N content might main reasons for behavior. addition, these have good applications fields light-emitting diode lighting anticounterfeiting.

Language: Английский

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