Metal ion sensing with graphene quantum dots: detection of harmful contaminants and biorelevant species

Revesz, Isabella A; Hickey, Shane M.; Sweetman, Martin Jay

doi:10.1039/d2tb00408a

Cited by 29 publications

(9 citation statements)

References 134 publications

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“…In the reducing PET, 0D CNMs function as recognizers’ electron acceptors, and electrons are transferred from the recognizers’ HOMO energy level to the CDs’ HOMO energy level. In oxidative PET, on the other hand, 0D CNMs function as electron donors to the recognizers, whereby excited electrons are transferred from the CDs’ LUMO energy level (donor) to the recognizers’ LUMO energy level (acceptor). , Zero-dimensional CNMs predominantly recognize metal ions through the PET mechanism, wherein 0D CNMs transferring electrons through their surface-rich functional groups to metal ions quenches the fluorescence (Figure e) …”

Section: Optical Properties Of 0d Cnmsmentioning

confidence: 99%

Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Yang,

Xu,

et al. 2023

Chem. Rev.

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

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Section: Optical Properties Of 0d Cnmsmentioning

confidence: 99%

Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Yang,

Xu,

et al. 2023

Chem. Rev.

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“…[5][6][7][8][9][10] GQD synthesis can be easily achieved through a top-down or bottom-up approach from various precursors. [6][7][8]11 Because of their fascinating chemical properties, excellent optical features, attractive catalytic performance, good water dispersity and chemical stability, GQDs exhibit great potential in application fields such as catalysis, 12,13 energy, 14 sensing 15 and biomedicine. 16 The unique optical properties of GQDs are related to their shellcore composition, which can be optimized by modifying the functional groups located at the edge.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen- and sulfur-doped graphene quantum dots for chemiluminescence

et al. 2023

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“…Among different FL nanomaterials, carbon dots (CDs) are superior in the aspects of FL performance, biocompatibility, and easy synthesis, which attracts great attention in various applications, especially the chemical sensor . However, the emission wavelength of most of the CD-based FL probes is focused on the blue or green region. − Moreover, the CDs with a longer FL wavelength would eliminate interference in complex biological environments to obviously improve the anti-interference capacity of CDs. Based on the above-mentioned considerations, the combination of red-emissive CDs with the typical Fe 3+ quenching behavior would contribute to sensitive and effective detection of the TAC in food.…”

Section: Introductionmentioning

confidence: 99%

Red-Emissive Carbon Dots Combined with Ferric Ions for Detection of Total Antioxidant Capacity in Food

Luo

Liu

Sun

et al. 2023

ACS Appl. Nano Mater.

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In general, the total antioxidant capacity (TAC) in food is vital for evaluating the quality of antioxidant food and health monitoring. Most studies about the access of the TAC in food are mainly focused on typical colorimetric strategies. Herein, a simple and sensitive strategy for TAC in beverages and fruit has been proposed based on amino/hydroxyl-functionalized carbon dots (N 2 H 4 -CDs) and Fe 3+ . The fluorescence (FL) of N 2 H 4 -CDs at 650 nm can be effectively and selectively quenched via the formation of the nonfluorescence complex (Fe 3+ /N 2 H 4 -CDs). Moreover, the FL of N 2 H 4 -CDs is concentrated in the red region, which can eliminate the interference in complex biological environments. Interestingly, based on the theoretical calculations of density functional theory (DFT), we have confirmed that the surface amino and hydroxyl play an essential role in selective association with Fe 3+ , resulting in effective quenching. Moreover, because Fe 3+ can be reduced by antioxidants to Fe 2+ , the quenched FL of N 2 H 4 -CDs can be restored in the presence of ascorbic acid (AA) and glutathione (GSH). Therefore, the typical antioxidants (AA) and especially certain thiol antioxidants (GSH) can also be analyzed by the proposed strategy. More importantly, we have proved that this strategy is successfully utilized for analyzing the TAC in beverages and fruit.

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Metal ion sensing with graphene quantum dots: detection of harmful contaminants and biorelevant species

Abstract: Graphene quantum dots (GQDs) are attractive materials for use as highly selective and sensitive chemical sensors, owing to their simple preparation and affordability. GQDs have been successfully deployed as sensors...

Cited by 29 publications

References 134 publications

Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Nitrogen- and sulfur-doped graphene quantum dots for chemiluminescence

Red-Emissive Carbon Dots Combined with Ferric Ions for Detection of Total Antioxidant Capacity in Food

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