Polysaccharide-based C-dots and polysaccharide/C-dot nanocomposites: fabrication strategies and applications

Bazazi, Sina; Hosseini, Parisa; Hashemi, Esmaeil; Rashidzadeh, Bahaaldin; Liu, Yuqian; Saeb, Mohammad Reza; Xiao, Huining; Seidi, Farzad

doi:10.1039/d2nr07065k

Cited by 10 publications

(6 citation statements)

References 198 publications

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“…Carbon quantum dots (CQDs) are a relatively new class of nanomaterials with high biocompatibility and antimicrobial activity which can be prepared usually through a facile hydrothermal process. , Fabrication of active packaging films via the incorporation of CQDs has gained increased attention in recent years. − Riahi et al prepared chitosan-based CQDs with a size of around 8 nm and incorporated them into the CMC/glycerol films for the fabrication of functional films with strong antioxidant and antimicrobial activity . These CQDs made the CMC films stronger and stiffer with reduced flexibility.…”

Section: Cellulose-based Filmsmentioning

confidence: 99%

Recent Advances in Functional Cellulose-based Films with Antimicrobial and Antioxidant Properties for Food Packaging

Shen,

Seidi,

Ahmad

et al. 2023

J. Agric. Food Chem.

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The packaging of food plays a crucial role in food preservation worldwide. However, traditional packaging systems are passive layers with weak efficiency in protecting the food quality. Therefore, packaged foods are gradually spoiled due to the oxidation and growth of microorganisms. Additionally, most of the commercial packaging films are made of petroleum-based materials which raise environmental concerns. Accordingly, the development of eco-friendly natural-derived active packaging systems has increased the attention of scientists. Cellulose as the most abundant polysaccharide on earth with high biocompatibility, no toxicity, and high biodegradability has extensively been applied for the fabrication of packaging films. However, neat cellulose-based films lack antioxidant and antimicrobial activities. Therefore, neat cellulose-based films are passive films with weak food preservation performance. Active films have been developed by incorporating antioxidants and antimicrobial agents into the films. In this review, we have explored the latest research on the fabrication of antimicrobial/antioxidant cellulose-based active packaging films by incorporating natural extracts, natural polyphenols, nanoparticles, and microparticles into the cellulose-based film formulations. We categorized these types of packaging films into two main groups: (i) blend films which are obtained by mixing solutions of cellulose with other soluble antimicrobial/antioxidant agents such as natural extracts and polyphenols; and (ii) composite films which are fabricated by dispersing antimicrobial/antioxidant nano- or microfillers into the cellulose solution. The effect of these additives on the antioxidant and antimicrobial properties of the films has been explained. Additionally, the changes in the other properties of the films such as hydrophilicity, water evaporation rate, and mechanical properties have also been briefly addressed.

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Section: Cellulose-based Filmsmentioning

confidence: 99%

Recent Advances in Functional Cellulose-based Films with Antimicrobial and Antioxidant Properties for Food Packaging

Shen,

Seidi,

Ahmad

et al. 2023

J. Agric. Food Chem.

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“…To date, the synthesis of carbonised polymer dots can be carried out using a variety of polymers [64]. To improve the fluorescence properties, regulating the surface state of carbon nanomaterials [65], increasing the crosslinking degree of polymers [66,67] and increasing the conjugation degree of carbonised polymer dots [68,69] have been widely accepted.…”

Section: Introductionmentioning

confidence: 99%

“…To improve the fluorescence properties, regulating the surface state of carbon nanomaterials [65], increasing the crosslinking degree of polymers [66,67] and increasing the conjugation degree of carbonised polymer dots [68,69] have been widely accepted. Most of the research on carbon dots has focused on the visible light region [62,64]. The near-infrared properties are also of great interest [70].…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the research on the physical properties of carbon dots, most of the studies have focused on the photoluminescence properties and their photodynamic mechanism process [62][63][64][65][66][67][68]. Since photoluminescence, the non-radiative energy consumption process and free electron/hole generation are three competitive processes in photodynamics, to suppress non-radiative energy consumption and improve the graphitisation degree and conjugation degree of polymer-derived carbon dots, the optoelectronic property would also need to be improved by improving the separation and transfer of electrons and holes through light triggering.…”

Section: Introductionmentioning

confidence: 99%

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Interface Interaction between MoO3 and Carbon Dots Derived from Chitosan Promoted the Photocurrent Extraction Ability of Carriers in a Wide Range of the Light Spectrum

Ma,

Gao,

Zhang

et al. 2024

Coatings

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Due to the large number of defects at the grain boundaries of nanocomposites, defects have a significant effect on the physico-chemical properties of a material. Therefore, controlling the charging behaviour of functional nanocomposites in a non-contact manner with a light field can improve their physical and chemical properties. Chitosan-derived carbon dots were synthesised by exploiting the abundant N element in chitosan. In order to passivate the defects of chitosan-derived carbon dots, a MoO3/carbon dot nanocomposite was constructed in this study to tailor the band gap and improve the extraction ability of carriers through light induction. The results showed that the strong interfacial interaction between MoO3 and carbon dots enhanced the optical absorption and interfacial charge transfer in the visible and some near-infrared regions. The resulting MoO3/carbon dot heterostructure was coated on A4 printing paper, and electrodes were integrated in the coating film. The photocurrent signals of the thick film were investigated using 405, 532, 650, 808, 980 and 1064 nm light sources. The results indicated that the phenomenon of photocurrent switching to the visible light and some near-infrared light regions was observed. The charge carrier extraction ability of the MoO3/carbon dot nanocomposite through light triggering was much better than that of chitosan-derived carbon dots. The on/off ratio and response speed of the MoO3/carbon dot nanocomposite were significantly improved. The physical mechanism was discussed based on the ordered and disordered structures of polymer-derived carbon nanomaterials. This material could be applicable to the development of broadband flexible photosensors, artificial vision or light-utilising interdisciplinary fields.

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“…Therefore, the impregnation of Cdots in polyelectrolyte microcapsules produced via the subsequent deposition of oppositely charged polymers holds promise as an effective approach for the design of structures with competitive potential for applications in biotechnology for imaging, drug delivery, and biosensors [ 14 , 15 , 16 ]. Moreover, because of the versatility of the properties and dimensions, Cdots have promising potential for the design of functional coverages [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Polysaccharide/Carbon Quantum Dots Composite Film on Model Colloidal Particles—An Electro-Optical Study

Milkova

2023

Polymers

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Negatively charged carbon dots (Cdots) were successfully impregnated into chitosan/alginate film formed on model colloidal particles as a result of the attractive interactions with the chitosan molecules. The electrical properties of the produced films were studied by electrokinetic spectroscopy. In this study, the electric light scattering method was applied for first the time for the investigation of suspensions of carbon-based structures. The electro-optical behavior for the suspension of polymer-coated particles showed that the electric polarizability of the particle-covered layer from alginate was significantly higher compared to that of the layer from chitosan due to the higher charge density of alginate. The presence of a low concentration of Cdots in the film results in partial charge screening. It was confirmed that the polarizability of counterions with lower mobility along the adsorbed polyion chains was responsible for the registered electro-optical effect from the suspension of polymer-coated particles and that the participation of diffuse H+ counterions of Cdots in the creation of the electro-optical effect was negligible. The observed oscillation behavior in the evolution of the film thickness was interpreted through the participation of compensatory effects due to the additional adsorption/desorption of polyelectrolyte complexes from the film surface. The concentration of Cdots in the film was determined, and the loaded amount was ca. 6.6 µg/mL per layer.

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Polysaccharide-based C-dots and polysaccharide/C-dot nanocomposites: fabrication strategies and applications

Abstract: C-dots are a new class of materials with vast applications. The synthesis of bio-based C-dots has attract vast attention in recent years. Polysaccharides, the most abundant natural materails with high...

Cited by 10 publications

References 198 publications

Recent Advances in Functional Cellulose-based Films with Antimicrobial and Antioxidant Properties for Food Packaging

Recent Advances in Functional Cellulose-based Films with Antimicrobial and Antioxidant Properties for Food Packaging

Interface Interaction between MoO3 and Carbon Dots Derived from Chitosan Promoted the Photocurrent Extraction Ability of Carriers in a Wide Range of the Light Spectrum

Polysaccharide/Carbon Quantum Dots Composite Film on Model Colloidal Particles—An Electro-Optical Study

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