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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Carbon Dots: From Synthesis to Unraveling the Fluorescence Mechanism

Small, Journal Year: 2023, Volume and Issue: 20(4)

Published: Sept. 15, 2023

Carbon dots (CDs) being a new type of carbon-based nanomaterial have attracted intensive interest from researchers owing to their excellent biophysical properties. CDs are class fluorescent carbon nanomaterials that emerged as promising alternative traditional quantum and organic dyes in applications including bioimaging, sensing, optoelectronics. possess unique optical properties, such tunable emission, facile synthesis, low toxicity, making them attractive for many biology, medicine, environmental areas. The synthesis is achievable by variety methods, bottom-up top-down approaches, involving the use different sources surface functionalization strategies. However, understanding fluorescence mechanism remains challenge. Various mechanistic models been proposed explain origin luminescence. This review summarizes recent developments provides an overview current mechanism.

Language: Английский

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The Formation Process and Mechanism of Carbon Dots Prepared from Aromatic Compounds as Precursors: A Review

Small, Journal Year: 2023, Volume and Issue: 19(31)

Published: Jan. 17, 2023

Abstract Fluorescent carbon dots are a novel type of nanomaterial. Due to their excellent optical properties, they have extensive application prospects in many fields. Studying the formation process and fluorescence mechanism CDs will assist scientists understanding synthesis guide more profound applications. conjugated structures, aromatic compounds been continuously used synthesize CDs, with emissions ranging from blue NIR. There is lack systematic summary precursors form CDs. In this review, first categorized into three main classes according precursor types compounds: amines, phenols, polycyclics. And then, synthesized summarized. The challenges proposed last section.

Language: Английский

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Disulfide Crosslinking‐Induced Aggregation: Towards Solid‐State Fluorescent Carbon Dots with Vastly Different Emission Colors^†

Chinese Journal of Chemistry, Journal Year: 2023, Volume and Issue: 41(9), P. 1007 - 1014

Published: Jan. 14, 2023

Comprehensive Summary Solid‐state fluorescent multi‐color carbon dots (SFM‐CDs), prepared using the same precursor(s) without need for dispersion in a solid matrix, are highly demanded wide range of applications. Herein, we report microwave‐assisted strategy preparation SFM‐CDs with blue, yellow and red emissions within 5 min from precursors. The as‐prepared B‐CDs, Y‐CDs, R‐CDs possessed bright fluorescence at 425 nm, 550 640 photoluminescence quantum yields (PLQYs) 54.68%, 17.93%, 2.88%, respectively. structure consisted 5‐oxo‐3,5‐dihydro‐2 H ‐thiazolo [3,2‐ ] pyridine‐7‐carboxylic acid (TPCA) immobilized on surface core, size core degree disulfide crosslinking between CDs both increasing going B‐CDs to R‐CDs, as verified by mechanochromic experiments. excellent solid‐state performance allowed their utilization converter layer LEDs white high color rendering index.

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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Carbon Dots‐Inked Paper with Single/Two‐Photon Excited Dual‐Mode Thermochromic Afterglow for Advanced Dynamic Information Encryption

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(31)

Published: May 13, 2024

Achieving thermochromic afterglow (TCAG) in a single material for advanced information encryption remains significant challenge. Herein, TCAG carbon dots (CDs)-inked paper (CDs@Paper) is achieved by tuning the temperature-dependent dual-mode of room temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF). The CDs are synthesized through thermal treatment levofloxacin melting boric acid with postpurification via dialysis. CDs@Paper exhibit both excitation-dependent color properties. exhibits dynamic changes from blue at high temperatures to yellow low adjusting proportion TADF phosphorescence. Notably, two-photon CDs-based materials time-dependent colors first time. Moreover, leveraging opposite emission responses temperature, demonstrate temperature-sensing capabilities across wide range. Furthermore, CDs@Paper-based 3D code containing successfully developed encryption.

Language: Английский

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Toward Kilogram‐Scale Preparation of Full‐Color Carbon Dots by Simply Stirring at Room Temperature in Air

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(50)

Published: Aug. 17, 2023

Abstract Large‐scale production of full‐color carbon dots (CDs) at room temperature under atmospheric pressure will promote their industrial application. Herein, o‐phenylenediamine is used as a single‐precursor source and hydrogen peroxide an oxidant. Kilogram‐scale CDs are obtained by stirring these reactants in air for 30 min. After purification acid treatment, blue‐, green‐, red‐fluorescence with photoluminescence peaks 481, 539, 625 nm quantum yields 21.76%, 27.12%, 13.06%, respectively. Based on chemical structural characterizations, reasonable formation mechanism deduced, blue, green, red fluorescence arising from nuclei stacked conjugate planes containing fragments quinoxaline, 2,3‐diaminophenazine (2,3‐DAPN), protonated 2,3‐DAPN, High‐quality multi‐color white light‐emitting diodes successfully fabricated to demonstrate potential commercial applications display illumination.

Language: Английский

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Self-Precipitation of Highly Purified Red Emitting Carbon Dots as Red Phosphors

The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(41), P. 9176 - 9182

Published: Oct. 5, 2023

Colloidal carbon dots (C-dots) have attracted a great deal of attention for their unique optical properties. However, it is still challenge to obtain highly purified C-dots without using multiple-step purification or postsize selection. In this work, self-precipitation hydrothermal reaction was used synthesize red-emitting (R-C-dots) o-phenylenediamine (o-PDA) as precursor any catalyst. The R-C-dots are able precipitate on the wall reactor, which enables us solid-state with high purity. photoluminescence quantum yield (PLQY) 36.75%, among highest PLQY values reported previously catalysts. transient PL and absorption spectra revealed that 5,14-dihydroquinoxalino[2,3-b]phenazine linked surface determined red luminescence behavior. This work provides new path controllable synthesis high-purity R-C-dots, showing potential applications in optoelectronic devices.

Language: Английский

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Rapid adsorption and detection of copper ions in water by dual-functional ion-imprinted polymers doping with carbon dots

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 315, P. 123666 - 123666

Published: March 21, 2023

Language: Английский

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Red/NIR C-dots: A perspective from carbon precursors, photoluminescence tuning and bioapplications

Carbon, Journal Year: 2024, Volume and Issue: 219, P. 118838 - 118838

Published: Jan. 17, 2024

Language: Английский

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