Biocompatible N-doped carbon dots for the eradication of methicillin-resistant S. aureus (MRSA) and sensitive analysis for europium (III)

Maruthapandi, Moorthy; Das, Poushali; Saravanan, A.; Natan, Michal; Banin, Ehud; Kannan, Sriram; Michaeli, Shulamit; Luong, John H. T.

doi:10.1016/j.nanoso.2021.100724

Cited by 15 publications

(9 citation statements)

References 53 publications

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“…The other predominant peaks around 286 and 289 eV correspond to the existence of C–O and C–N bonding in the CD moiety (Figure b). The higher binding energy peak observed at 289 eV is due to the O–CO structure. , The deconvoluted O1s peak at 532 eV illustrated the presence of CO in the CDs (Figure c), whereas the peak at 533 eV was attributed to the C–O and C–O–C functional groups . The high-resolution peak of the N 1s spectra (Figure d) shows four predominant peaks at 399.5, 401, and 402 eV.…”

Section: Resultsmentioning

confidence: 92%

“…39,42 The deconvoluted O1s peak at 532 eV illustrated the presence of C�O in the CDs (Figure 5c), whereas the peak at 533 eV was attributed to the C−O and C−O−C functional groups. 43 The high-resolution peak of the N 1s spectra (Figure 5d) shows four predominant peaks at 399.5, 401, and 402 eV. The dominant peak at 399.5 eV was attributed to the nitrogen involved in the C�N group.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

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Enhanced UV Protection, Heavy Metal Detection, and Antibacterial Properties of Biomass-Derived Carbon Dots Coated on Protective Fabrics

Durairaj

Maruthapandi

Luong

et al. 2022

ACS Appl. Bio Mater.

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Carbon dots (CDs) were simply prepared from charcoal by hydrothermal processing at 180 °C for 15 h without any chemicals. The as-prepared CDs with an average diameter of 5 ± 6 nm exhibited a predominant absorption peak at 290 nm, corresponding to the n to π* transition of the oxygen functional groups (C�O) and the free amine functional groups (−NH 2 ). The resulting CDs were then incorporated into cotton and polyester by facile ultrasonication for 1 h. The obtained CDcoated fabrics were first evaluated for their UV-blocking capability and then for their antibacterial properties against two model pathogens: Gram-negative E. coli and Gram-positive S. aureus. Both cotton and polyester showed no UV protection at 280 or 380 nm; conversely, cotton or polyester decorated with CDs exhibited a UV blocking ratio of 82−98%. The CD-coated fabrics showed 100% antibacterial activities against E. coli and S. aureus, whereas the pristine fabrics showed no effect. The CDs/fabrics could adsorb Hg 2+ and Fe 3+ , resulting in a drastic fluorescence quenching. As such, this distinct feature was exploited for the removal and detection of these two ions with the limits of detection of 55and 72 μM, respectively.

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Section: Resultsmentioning

confidence: 92%

Section: ■ Results and Discussionmentioning

confidence: 95%

Enhanced UV Protection, Heavy Metal Detection, and Antibacterial Properties of Biomass-Derived Carbon Dots Coated on Protective Fabrics

Durairaj

Maruthapandi

Luong

et al. 2022

ACS Appl. Bio Mater.

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“…Another interesting report on the use of fluorescence quenching ( Figure 9 ) is through carbon dots doped with nitrogen that detect Eu3 + ions [ 65 ] by entrapping them across the amine and phenolic groups on its surface. These nitrogen doped carbon dots in solution, when excited to 365 nm, show an intense blue fluorescence ( Figure 9 a) as compared to day light, a strong UV–visible absorbance ( Figure 9 b) at 205 nm corresponding to n − σ∗ in lone pair electrons of O and N, a broad peak close to 350 nm owing to n − π∗, and also excitation dependent fluorescence ( Figure 9 c) across 350 to 550 nm.…”

Section: Transformational Applications Of Nanomaterials For Sensing P...mentioning

confidence: 99%

“… Nitrogen doped carbon dots ( a ) exhibiting fluorescence; ( b ) UV–visible absorbance; and ( c ) fluorescence at various emission wavelengths, reproduced with permission from [ 65 ] (Moorthy et al, 2021). …”

Section: Figurementioning

confidence: 99%

Sensing beyond Senses: An Overview of Outstanding Strides in Architecting Nanopolymer-Enabled Sensors for Biomedical Applications

Malini¹,

Roy

Raj³

et al. 2022

Polymers

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Nano-enabled sensing is an expanding interdisciplinary field of emerging science with dynamic multifunctional detecting capabilities, equipped with a wide range of multi-faceted nanomaterial having diverse dimensions and composition. They have proven to be highly robust, sensitive, and useful diagnostic tools ranging from advanced industrial processes to ordinary consumer products. As no single nanomaterial has proved to be unparalleled, recent years has witnessed a large number of nanomaterial-based sensing strategies for rapid detection and quantification of processes and substances with a high degree of reliability. Nano-furnished platforms, because of easy fabrication methods and chemical versatility, can serve as ideal sensing means through different transduction mechanisms. This article, through a unified experimental-theoretical approach, uses literature of recent years to introduce, evaluate, and analyze significant developments in the area of nanotechnology-aided sensors incorporating the various classes of nanomaterial. Addressing the broad interests, the work also summarizes the sensing mechanisms using schematic illustrations, attempts to integrate the performance of different categories of nanomaterials in the design of sensors, knowledge gaps, regulatory aspects, future research directions, and challenges of implementing such techniques in standalone devices. In view of a dependency of analysis and testing on sustained growth of sensor-supported platforms, this article inspires the scientific community for more attention in this field.

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“…It is cost-effective and has excellent biocompatibility compared to traditional semiconductor nanodots and organic dyes . Due to these attributes, they have wide potential applications in several technologies, such as sensors, − drug delivery, catalysis, light-emitting diodes (LEDs), , solar cells, fluorescent ink, bioimaging, , and antibacterial activity. , Additionally, CDs have potential importance when they interact with polymer matrices, since polymeric matrices are distinguished by their ease of processing, low specific gravity, tunable physical characteristics, and ductility . When combined with macromolecular chains, CDs enhance exceptional properties such as rubber-like elasticity, thermal stability, reinforcing characteristics, toughening the polymeric matrix (particularly for soft materials), and adhesiveness. , Polymeric hydrogels are among the most frequently used soft-wet materials in healthcare .…”

Section: Introductionmentioning

confidence: 99%

Naturally Derived Carbon Dots In Situ Confined Self-Healing and Breathable Hydrogel Monolith for Anomalous Diffusion-Driven Phytomedicine Release

Das

Ganguly

Saravanan

et al. 2022

ACS Appl. Bio Mater.

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Fluorescent nanocarbons are well-proficient nanomaterials because of their optical properties and surface engineering. Herein, Apium graveolens-derived carbon dots (ACDs) have been synthesized by a one-step hydrothermal process without using any surplus vigorous chemicals or ligands. ACDs were captured via an in situ gelation reaction to form a semiinterpenetrating polymer network system showing mechanical robustness, fluorescent behavior, and natural adhesivity. ACDs-reinforced hydrogels were tested against robust uniaxial stress, repeated mechanical stretching, thixotropy, low creep, and fast strain recovery, confirming their elastomeric sustainability. Moreover, the room-temperature self-healing behavior was observed for the ACDs-reinforced hydrogels, with a healing efficacy of more than 45%. Water imbibition through hydrogel surfaces was digitally monitored via "breathing" and "accelerated breathing" behaviors. The phytomedicine release from the hydrogels was tuned by the ACDs' microstructure regulatory activity, resulting in better control of the diffusion rate compared to conventional chemical hydrogels. Finally, the phytomedicine-loaded hydrogels were found to be excellent bactericidal materials eradicating more than 85% of Gram-positive and -negative bacteria. The delayed network rupturing, superstretchability, fluorescent self-healing, controlled release, and antibacterial behavior could make this material an excellent alternative to soft biomaterials and soft robotics.

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Biocompatible N-doped carbon dots for the eradication of methicillin-resistant S. aureus (MRSA) and sensitive analysis for europium (III)

Cited by 15 publications

References 53 publications

Enhanced UV Protection, Heavy Metal Detection, and Antibacterial Properties of Biomass-Derived Carbon Dots Coated on Protective Fabrics

Enhanced UV Protection, Heavy Metal Detection, and Antibacterial Properties of Biomass-Derived Carbon Dots Coated on Protective Fabrics

Sensing beyond Senses: An Overview of Outstanding Strides in Architecting Nanopolymer-Enabled Sensors for Biomedical Applications

Naturally Derived Carbon Dots In Situ Confined Self-Healing and Breathable Hydrogel Monolith for Anomalous Diffusion-Driven Phytomedicine Release

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