Nitrogen-doped carbon dots derived from polyamindoamine dendrimer

Shen, Juncai; Li, Qing; Zhang, Yan; She, Xing-jin; Wang, Cai‐Feng; Chen, Su

doi:10.1039/c6ra12261b

Cited by 18 publications

(7 citation statements)

References 48 publications

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“…(A) Application of CDs as anticounterfeiting inks for printing on paper, (B) their patterns on hydrophilic photoetching stripes (under UV, blue, and green light excitation), (C) fluorescence microscopy images of the PVA/CD nanofibers with UV, blue, and green light excitation, (D) printed paper with CD inks in multiple colors tuned by the CD concentration in aqueous solution, (E) bulk PDMAA/CD nanocomposites under UV light irradiation (365 nm), (F) printing of fluorescent Tai Chi patterns by silk-screen printing at different pH values and different solvents and nanoprinting of fluorescent butterfly and lotus patterns, and (G) fluorescence spectra of the nitrogen-doped CDs aqueous solution at different pH values (λ ex = 360 nm) and in different solvents (λ ex = 360 nm) (scale bar = 1 cm). Reproduced with permission from ref (copyright 2013 Wiley-VCH) and ref (copyright 2016 Royal Society of Chemistry).…”

Section: Photoluminescencementioning

confidence: 99%

“…With a different strategy, nitrogen-doped CDs were synthesized by a hydrothermal process of poly(amidoamine) (PAMAM) dendrimer and citric acid that resulted in highly fluorescent cyan nanoparticles in aqueous solution with a particle size of about 2.8 nm and quantum yield of 40% . These nitrogen-doped CDs have potential applications in anticounterfeiting inks to induce security marks by a silk-screen printing method, as shown in Figure F.…”

Section: Photoluminescencementioning

confidence: 99%

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Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

et al. 2020

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Counterfeiting and inverse engineering of security and confidential documents, such as banknotes, passports, national cards, certificates, and valuable products, has significantly been increased, which is a major challenge for governments, companies, and customers. From recent global reports published in 2017, the counterfeiting market was evaluated to be $107.26 billion in 2016 and forecasted to reach $206.57 billion by 2021 at a compound annual growth rate of 14.0%. Development of anticounterfeiting and authentication technologies with multilevel securities is a powerful solution to overcome this challenge. Stimuli-chromic (photochromic, hydrochromic, and thermochromic) and photoluminescent (fluorescent and phosphorescent) compounds are the most significant and applicable materials for development of complex anticounterfeiting inks with a high-security level and fast authentication. Highly efficient anticounterfeiting and authentication technologies have been developed to reach high security and efficiency. Applicable materials for anticounterfeiting applications are generally based on photochromic and photoluminescent compounds, for which hydrochromic and thermochromic materials have extensively been used in recent decades. A wide range of materials, such as organic and inorganic metal complexes, polymer nanoparticles, quantum dots, polymer dots, carbon dots, upconverting nanoparticles, and supramolecular structures, could display all of these phenomena depending on their physical and chemical characteristics. The polymeric anticounterfeiting inks have recently received significant attention because of their high stability for printing on confidential documents. In addition, the printing technologies including hand-writing, stamping, inkjet printing, screen printing, and anticounterfeiting labels are discussed for introduction of the most efficient methods for application of different anticounterfeiting inks. This review would help scientists to design and develop the most applicable encryption, authentication, and anticounterfeiting technologies with high security, fast detection, and potential applications in security marking and information encryption on various substrates.

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Section: Photoluminescencementioning

confidence: 99%

Section: Photoluminescencementioning

confidence: 99%

Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

et al. 2020

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“…Time-correlated single-photon counting (TCSPC) was applied to measure the fluorescence lifetime of the N-doped CDs. As presented in Figure 4(c) , the decay lifetime of the N-doped CDs was measured with the previous reports [ 30 ], and the calculated average fluorescence lifetime for the N-doped CDs was 4.45 ± 0.05 ns. Moreover, the photostability ( Figure 4(d) ) of the N-doped CDs synthesized was tested upon continuous excitation at 360 nm for 5 h; the fluorescence remained intact without any photobleaching, which corroborates to reasonably good photostability of N-doped CDs.…”

Section: Resultsmentioning

confidence: 56%

A Facile Synthesis of Highly Nitrogen-Doped Carbon Dots for Imaging and Detection in Biological Samples

Zhang

Xie

Yang

et al. 2018

Journal of Analytical Methods in Chemistry

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A facile, green, and high-output hydrothermal synthesis was proposed for the fabrication of highly fluorescent nitrogen-doped carbon quantum dots (N-doped CDs). The nitrogen content in N-doped CDs reached 19.2% and demonstrated strong blue fluorescence emission was obtained with fluorescence quantum yield (QY) of up to 32.9%, which exhibit high fluorescence quantum yield, high photostability, and excellent biocompatibility. The N-doped CDs possess high photostability, low toxicity, and excellent biocompatibility, based on which the N-doped CDs were successfully applied as a fluorescence probe for cell imaging. Moreover, it was then successfully demonstrated for sensitive and selective detection of Fe3+ in serum.

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“…They were further hybridized with poly(N-isopropylacrylamide) and used for sensitive detection of Fe 3+ , as printing ink, and in thermosensitive devices (Figure 31a,b). 268 Tao et al reported the synthesis of fluorescent CQDs (20−30 nm) with an absolute QY of 44% by hydrothermally cross-linking poly(acrylic acid) (PAA, MW = 3500 g/mol) and ethylenediamine (EDA). 269 The fluorescence mechanism was studied by investigating the optical properties of individually or co-treated PAA and EDA products.…”

Section: Heteroatom-doped Porous Carbon Particlesmentioning

confidence: 99%

Polymer-Derived Heteroatom-Doped Porous Carbon Materials

et al. 2020

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Heteroatom-doped porous carbon materials (HPCMs) have found extensive applications in adsorption/separation, organic catalysis, sensing, and energy conversion/storage. The judicious choice of carbon precursors is crucial for the manufacture of HPCMs with specific usages and maximization of their functions. In this regard, polymers as precursors have demonstrated great promise because of their versatile molecular and nanoscale structures, modulatable chemical composition, and rich processing techniques to generate textures that, in combination with proper solid-state chemistry, can be maintained throughout carbonization. This Review comprehensively surveys the progress in polymer-derived functional HPCMs in terms of how to produce and control their porosities, heteroatom doping effects, and morphologies and their related use. First, we summarize and discuss synthetic approaches, including hard and soft templating methods as well as direct synthesis strategies employing polymers to control the pores and/or heteroatoms in HPCMs. Second, we summarize the heteroatom doping effects on the thermal stability, electronic and optical properties, and surface chemistry of HPCMs. Specifically, the heteroatom doping effect, which involves both single-type heteroatom doping and codoping of two or more types of heteroatoms into the carbon network, is discussed. Considering the significance of the morphologies of HPCMs in their application spectrum, potential choices of suitable polymeric precursors and strategies to precisely regulate the morphologies of HPCMs are presented. Finally, we provide our perspective on how to predefine the structures of HPCMs by using polymers to realize their potential applications in the current fields of energy generation/conversion and environmental remediation. We believe that these analyses and deductions are valuable for a systematic understanding of polymer-derived carbon materials and will serve as a source of inspiration for the design of future HPCMs.

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Nitrogen-doped carbon dots derived from polyamindoamine dendrimer

Cited by 18 publications

References 48 publications

Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

Photoluminescent and Chromic Nanomaterials for Anticounterfeiting Technologies: Recent Advances and Future Challenges

A Facile Synthesis of Highly Nitrogen-Doped Carbon Dots for Imaging and Detection in Biological Samples

Polymer-Derived Heteroatom-Doped Porous Carbon Materials

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