β-Cyclodextrin and calix[4]arene-25,26,27,28-tetrol capped carbon dots for selective and sensitive detection of fluoride

Baruah, Upama; Gogoi, Neelam; Majumdar, Gitanjali; Chowdhury, Devasish

doi:10.1016/j.carbpol.2014.09.083

Cited by 65 publications

(30 citation statements)

References 36 publications

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“…185 In 2015, Baruah et al reported sensitive and selective fluoride ion detectors based on C-dots functionalized with β-cyclodextrin and calix [4]arene-25,26,27,28-tetrol. 186 The functionalized C-dots showed increased PL intensity exclusively in the presence of F − , with a minimum detection limit of ~ 6.6 M. Recently, the detection range of C-dot-based sensors was extended to various molecules. 8,15,[187][188][189][190][191][192] Shen et al fabricated fluorescent C-dots modified with boronic acid for nonenzymatic glucose sensing applications.…”

Section: Sensingmentioning

confidence: 99%

Improving the functionality of carbon nanodots: doping and surface functionalization

et al. 2016

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Distinct from conventional carbon nanostructures, such as fullerene, graphene, and carbon nanotubes, carbon nanodots (C-dots) exhibit unique properties such as strong fluorescence, high photostability, chemical inertness, low toxicity, and biocompatibility. Various synthetic routes for C-dots have been developed in the last few years, and now intense research efforts have been focused on improving their functionality. In this aspect, doping and surface functionalization are two major ways to control the chemical, optical, and electrical properties of C-dots. Doping introduces atomic impurities into C-dots to modulate their electronic structure, and surface functionalization modifies the C-dot surface with functional molecules or polymers. In this review, we summarize recent progress in doping and surface functionalization of C-dots for improving their functionality, and offer insight into controlling the properties of C-dots for a variety of applications ranging from biomedicine to optoelectronics to energy.

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Section: Sensingmentioning

confidence: 99%

Improving the functionality of carbon nanodots: doping and surface functionalization

et al. 2016

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“…Meanwhile, the synthesis method is simple and facile. Compared to other EPSs derived from animals like chitin or from plants like cellulose and gelatin that have been employed as precursors for production of CDs ( Chowdhury et al, 2012 ; Shchipunov et al, 2015 ; Shen et al, 2016 ), the production of microbial EPS from fermentation is timesaving and controllable with much higher production titer ( Moscovici, 2015 ). The defined and reproducible EPS production by easily controlled fermentation parameters would ensure a high quality of CDs-EPS production.…”

Section: Resultsmentioning

confidence: 99%

Exopolysaccharide-Derived Carbon Dots for Microbial Viability Assessment

Lin

Chen

2018

Front. Microbiol.

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Fluorescent dye staining combined with fluorescence microscopy or flow cytometry is becoming a routine way to monitor microorganism viability that is necessary for food safety, antibiotic development, and human health. However, the conventional live/dead assay dyes suffer from high cost, inconvenient staining steps, and high cytotoxicity, which is urgently needed to overcome. Herein, cheap carbon dots, CDs-EPS605, were reported to successfully assess microbial viability in a convenient way with neglectable cytotoxicity. The fluorescent N-doped CDs-EPS605 could be facilely prepared from bacterial amino exopolysaccharide (EPS) by one-step hydrothermal carbonization, which is cost-effective and sustainable. The negatively charged CDs-EPS605 consisted of C, H, O, N, P, and S, and featured various functional groups, including -COOH, -OH, -CONH-, and -NH2. CDs-EPS605 were observed to sensitively and selectively stain dead microorganisms instead of live ones to enable discrimination of live/dead microorganisms. The labeling method with CDs-EPS605 did not require protection from light, or washing, which is convenient. Additionally, CDs-EPS605 displayed better photostability and much less cytotoxicity compared to the commercial counterpart. Altogether, CDs-EPS605 represent a simple, yet powerful staining agent for microbial viability assessment, and at the same time enrich the current applications of microbial EPS.

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“…Other research groups have reported the detection of anions via surface modification or functionalization of CDs with specific chelating agents. For instance, Baruah et al [ 185 ] functionalized CDs with β-cyclodextrin or calix [4] arene-25,26,27,28-tetrol for the detection of fluoride. Upon capping with the macromolecules, the fluorescence of CDs showed a decrease in the PL intensity.…”

Section: Sensing Applicationsmentioning

confidence: 99%

Biogreen Synthesis of Carbon Dots for Biotechnology and Nanomedicine Applications

2018

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Over the past decade, carbon dots have ignited a burst of interest in many different fields, including nanomedicine, solar energy, optoelectronics, energy storage, and sensing applications, owing to their excellent photoluminescence properties and the easiness to modify their optical properties through doping and functionalization. In this review, the synthesis, structural and optical properties, as well as photoluminescence mechanisms of carbon dots are first reviewed and summarized. Then, we describe a series of designs for carbon dot-based sensors and the different sensing mechanisms associated with them. Thereafter, we elaborate on recent research advances on carbon dot-based sensors for the selective and sensitive detection of a wide range of analytes, including heavy metals, cations, anions, biomolecules, biomarkers, nitroaromatic explosives, pollutants, vitamins, and drugs. Lastly, we provide a concluding perspective on the overall status, challenges, and future directions for the use of carbon dots in real-life sensing.

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β-Cyclodextrin and calix[4]arene-25,26,27,28-tetrol capped carbon dots for selective and sensitive detection of fluoride

Cited by 65 publications

References 36 publications

Improving the functionality of carbon nanodots: doping and surface functionalization

Improving the functionality of carbon nanodots: doping and surface functionalization

Exopolysaccharide-Derived Carbon Dots for Microbial Viability Assessment

Biogreen Synthesis of Carbon Dots for Biotechnology and Nanomedicine Applications

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