Background-free room temperature phosphorescence and digital image colorimetry detection of melamine by carbon nitride quantum dots in cellulose matrix with smartphone-based portable device

Kong, Yuelin; Lei, Tiantian; He, Yu; Song, Gongwu

doi:10.1016/j.foodchem.2022.133135

Cited by 15 publications

(15 citation statements)

References 36 publications

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“…The phosphorescence of different color usually showed various lifetime, and thus time‐dependent RTP behavior would be achieved. [ 44,82,83 ] If these emitting centers only could be excited under individual excitation wavelength, the CDs‐based RTP materials would show excitation‐dependent behavior. [ 62,78,84,85 ]…”

Section: Emission Mechanism Of Cds‐based Rtp Materialsmentioning

confidence: 99%

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Long‐Lived Dynamic Room Temperature Phosphorescence from Carbon Dots Based Materials

Wang

Yang

2023

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As a type of room temperature phosphorescence (RTP) material, carbon dots (CDs) always show short lifetime and low phosphorescence efficiency. To counter these disadvantages, several strategies, such as embedding in rigid matrix, introducing of heteroatom, crosslink‐enhanced emission, etc., are well developed. Consequently, lots of CDs‐based RTP materials are obtained. Doping of CDs into various matrix is the dominant method for preparation of long‐lived CDs‐based RTP materials so far. The desired CDs@matrix composites always display outstanding RTP performances. Meanwhile, matrix‐free CDs and carbonized polymer dots‐based RTP materials are also widely developed. Amounts of CDs possessing ultra‐long lived, multiple colored, and dynamic RTP emission are successfully obtained. Herein, the recent progress achieved in CDs‐based RTP materials as well as the corresponding efficient strategies and emission mechanisms are summarized and reviewed in detail. Due to CDs‐based RTP materials possess excellent chemical stability, photostability and low biological toxicity, they exhibit great application potential in the fields of anti‐counterfeiting, data encryption, and biological monitoring. The application of the CDs‐based RTP materials is also introduced in this review. As a promising functional material, development of long wavelength RTP emitting CDs with long lifetime is still challengeable, especially for the red and near‐infrared emitting RTP materials.

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Section: Emission Mechanism Of Cds‐based Rtp Materialsmentioning

confidence: 99%

“…Except for PVA, other polymeric matrix that can provide hydrogen bond interactions, such as polyvinyl pyrrolidone (PVP), [ 45,94,95 ] polyacrylic amide (PAM), [ 96,97 ] paper, [ 38,44,98 ] cellulose derivatives, [ 83,99 ] polyurethane (PU), [ 81,100 ] etc., were also developed. Jia et al.…”

Section: Cds Embedded In Matrix To Fabricate Rtp Materialsmentioning

confidence: 99%

Long‐Lived Dynamic Room Temperature Phosphorescence from Carbon Dots Based Materials

Wang

Yang

2023

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“…To alleviate the reduced fluorescence stability of CDs caused by aggregation-induced fluorescence quenching, an ingenious strategy was proposed to encapsulate CDs into the matrix to limit their movement and make them uniformly distributed . It is feasible to incorporate CDs into a matrix because the matrix not only stabilizes the fluorescence of CDs but also provides the possibility of portable and real-time detection . Compared to synthetic polymer films, cellulose-based films are more attractive because the material is natural, renewable, biodegradable, and biocompatible .…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the separated cellulose was treated by oxidation and homogenization to prepare CNFs, which were chosen as the matrix to fabricate an intelligent pH-responsive CDs/CNFs film for real-time and visual food freshness monitoring. The internal hydrogen-bonding interaction between CDs and CNFs could effectively stabilize the fluorescence of CDs by establishing the confinement effect . Furthermore, the integration of this fluorescence sensing platform with a smartphone provided a promising strategy for the application of biomass-based materials in the sensing field.…”

Section: Introductionmentioning

confidence: 99%

Lignin-Derived Carbon Dot/Cellulose Nanofiber Films for Real-Time Food Freshness Monitoring

Lin

Shi

Hou

et al. 2022

ACS Appl. Nano Mater.

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Herein, a facile, environmental-friendly, and sustainable strategy for efficient separation, conversion, and utilization of lignocellulose components was developed. Lignocellulose components were separated by green deep eutectic solvent (DES). The extracted lignin had potential for downstream production of aromatic chemicals and was used to synthesize lignin-doped carbon dots (CDs) in a ratiometric fluorescent probe for detecting biogenic amines (BAs) that were generated from food spoilage. The preparation of CDs provided an efficient strategy to convert biomass waste into carbon-based nanomaterials. This probe exhibited a sensitive, rapid, and linear response to BAs with a low detection limit of 0.045 μM. The retained cellulose with the crystal I structure was used to prepare cellulose nanofibers (CNFs) via oxidation and mechanical treatment. Furthermore, the CNFs were used as a matrix to fabricate CDs/CNFs films for real-time and visual food freshness monitoring. From biomass waste to rational applications, this study not only expanded the comprehensive utilization of lignocellulose in a green and environment-friendly manner but also demonstrated the prospects of CDs-based composite films in on-site monitoring of food quality and safety.

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“…In recent years, large attention has been paid to room-temperature phosphorescent (RTP) materials due to their excellent characteristics, such as large Stokes shift, long afterglow lifetime, and effective elimination of background fluorescence. − These characteristics endow them with wide application prospects in information security, photoelectronics, sensing, and high-sensitivity bioimaging. − At present, common RTP materials still have the shortcomings of biotoxicity, environmental hazard, and high synthesis cost. − To improve the situation, carbon dots (CDs) as a potential candidate material have become one type of the next-generation RTP materials. , …”

Section: Introductionmentioning

confidence: 99%

Enhanced Aggregation-Induced Phosphorescence of Carbon Dots for Information Encryption Applications

Chao

Dong

Wang

et al. 2022

ACS Appl. Nano Mater.

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Aggregation-induced phosphorescence (AIP) has attracted much attention for its unique luminescent characteristics. Nevertheless, this fascinating phenomenon is rarely reported in the field of carbon dots (CDs). Herein, a simple method to prepare CDs simultaneously with dispersion-state fluorescence, aggregation-state fluorescence, and phosphorescence is presented by a one-step solvothermal process. The resultant AIP CDs (A-CDs) display a long afterglow lifetime of 0.51 s in the aggregation state, lasting about 5 s to the naked eye. The phosphorescence emission of A-CDs resulted from the rigid, protective structure due to the aggregation state. In addition, inorganic silica has been employed as a doping matrix to effectively improve phosphorescent properties (1.11 s). Benefitting from the unique luminescence feature and excellent water dispersibility, the A-CDs can be dispersed directly in water, and the phosphorescent emission could be controlled by regulating the concentration, thus enabling information encryption.

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Background-free room temperature phosphorescence and digital image colorimetry detection of melamine by carbon nitride quantum dots in cellulose matrix with smartphone-based portable device

Cited by 15 publications

References 36 publications

Long‐Lived Dynamic Room Temperature Phosphorescence from Carbon Dots Based Materials

Long‐Lived Dynamic Room Temperature Phosphorescence from Carbon Dots Based Materials

Lignin-Derived Carbon Dot/Cellulose Nanofiber Films for Real-Time Food Freshness Monitoring

Enhanced Aggregation-Induced Phosphorescence of Carbon Dots for Information Encryption Applications

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