Incorporation of quantum carbon dots into a PVP/ZnO hydrogel for use as an effective hexavalent chromium sensing platform

Truskewycz, Adam; Beker, Sabrina Anderson; Ball, Andrew S.; Murdoch, Billy J.; Cole, Ivan

doi:10.1016/j.aca.2019.11.053

Cited by 33 publications

(22 citation statements)

References 36 publications

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“…This hybrid hydrogel showed a high capability of controlling the release of antibiotic in time. Other key applications in biomedical field are represented by sensing applications: a polyvinylpyrrolidone hydrogel stabilized with ZnO quantum dots was developed as a sensing platform for hexavalent chromium (Truskewycz et al 2020). The functionalization of this system with photoluminescent 2-amino-2-methyl-1-propanol quantum carbon dots showed a limit of detection of 1.2 μM Cr 6+ , below the maximum allowable limit for drinking water.…”

Section: Biomedical Applicationsmentioning

confidence: 99%

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

et al. 2020

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The inert nature of most commercial polymers and nanomaterials results in limitations of applications in various industrial fields. This can be solved by surface modifications to improve physicochemical and biological properties, such as adhesion, printability, wetting and biocompatibility. Polymer functionalization allows to graft specific moieties and conjugate molecules that improve material performances. In the last decades, several approaches have been designed in the industry and academia to graft functional groups on surfaces. Here, we review surface decoration of polymers and nanomaterials, with focus on major industrial applications in the medical field, textile industry, water treatment and food packaging. We discuss the advantages and challenges of polymer functionalization. More knowledge is needed on the biology behind cell–polymer interactions, nanosafety and manufacturing at the industrial scale.

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Section: Biomedical Applicationsmentioning

confidence: 99%

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

et al. 2020

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“…In the prepared hydrogels, PEI-CDs acted as the fluorescent sensor to selectively detect Fe(III), and MCC as the gel matrix could eliminate the self-quenching of the fluorescent sensor. Truskewycz et al [129] prepared a novel hydrogel composite of CDs/PVP/ZnO as an effective Cr(VI) sensing platform with a LOD of 1.2 μM. This hydrogel composite was cheap to manufacture and could be injected into a 96 well plate for high-throughput environmental diagnostic applications.…”

Section: Hydrogels or Polymers Filmsmentioning

confidence: 99%

Recent advances in fluorescence probes based on carbon dots for sensing and speciation of heavy metals

2020

Nanophotonics

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Heavy metal (HM) pollution is a major global concern. Carbon dots (CDs) have demonstrated unique properties as sensing platforms for HMs detection. This review summarizes the progress made in recent years in fluorescence methods to determine HMs and their species using CDs. First, the strategies to synthesize and purify CDs are reviewed. The photoluminescence principles of CDs and their sensing mechanisms as HMs sensors are then summarized. The binding strategies between CDs and HMs are proposed to provide salient principles to design desirable CD-based HMs sensors. The preparation and merits of “turn-on” and ratiometric CDs for HMs detection with higher accuracy are discussed compared with commonly used “turn-off” sensors. Subsequently, the progress on detecting single HM ions, multi-HMs, and different metal species in solution, and the development of gel/solid-state sensor platforms such as paper-based devices, sensor arrays, hydrogels, polymer films, and ion-imprinted polymers are critically accessed. Furthermore, the advances in the cell, bacterial, plant, and animal bioimaging of HMs with CDs as promising bioimaging reagents are presented. Finally, the challenges and prospects of CDs as HMs sensors in future investigations are discussed.

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“…Liquid platforms always suffer from a shorter shelf life and often require scientific intervention. Moreover, they are difficult to implement in field-based settings [23]. Therefore, developing novel sensing systems to solve these problems is highly desired.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Quantum Dot-Embedded Photonic Crystal Hydrogel and Its Application as Fluorescence Sensor for the Detection of Nitrite

Wang

et al. 2021

Nanomaterials

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The development of fluorescence sensing platforms with excellent photoluminescence capabilities is of great importance for their further application. In this work, a photonic crystal structure was successfully applied to enhance the luminescence performance of fluorescent hydrogel, and the application of the obtained hydrogel as a fluorescence sensor was explored. A polystyrene photonic crystal template was constructed via vertical deposition self-assembly; then, the precursor solution containing polyethylenimine-capped CdS quantum dots (PEI-CdS QDs) and monomers filled in the gap of the template. After the polymerization process, the desired hydrogel was obtained. PEI-CdS QDs endowed the hydrogel with its fluorescence property, while interestingly, the photonic crystal structure showed a significant enhancement effect on the fluorescence-emission capability. The mechanism of this phenomenon was revealed. Moreover, this hydrogel could be used as a reusable fluorescence sensor for the detection of nitrite in water with good selectivity. The limit of detection was determined to be 0.25 μmol/L, which is much lower than the maximum limit for nitrite in drinking water.

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Incorporation of quantum carbon dots into a PVP/ZnO hydrogel for use as an effective hexavalent chromium sensing platform

Cited by 33 publications

References 36 publications

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

Functionalization of polymers and nanomaterials for water treatment, food packaging, textile and biomedical applications: a review

Recent advances in fluorescence probes based on carbon dots for sensing and speciation of heavy metals

Preparation of Quantum Dot-Embedded Photonic Crystal Hydrogel and Its Application as Fluorescence Sensor for the Detection of Nitrite

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