Carbon Nanomaterials: Synthesis, Functionalization and Sensing Applications

Nanomaterials, Journal Year: 2021, Volume and Issue: 11(4), P. 967 - 967

Published: April 9, 2021

Recent advances in nanomaterial design and synthesis has resulted robust sensing systems that display superior analytical performance. The use of nanomaterials within sensors accelerated new routes opportunities for the detection analytes or target molecules. Among others, carbon-based have reported biocompatibility, better sensitivity, selectivity lower limits to reveal a wide range organic inorganic Carbon are among most extensively studied materials because their unique properties spanning from high specific surface area, carrier mobility, electrical conductivity, flexibility, optical transparency fostering applications. In this paper, comprehensive review been made cover recent developments field describes like fullerenes, carbon onions, quantum dots, nanodiamonds, nanotubes, graphene. Synthesis these nanostructures discussed along with functionalization methods. application all applications highlighted principal applicative future prospects possibilities outlined.

Language: Английский

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Carbon-based antiviral nanomaterials: graphene, C-dots, and fullerenes. A perspective

Chemical Science, Journal Year: 2020, Volume and Issue: 11(26), P. 6606 - 6622

Published: Jan. 1, 2020

The appearance of new and lethal viruses their potential threat urgently requires innovative antiviral systems.

Language: Английский

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Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

Nanomaterials, Journal Year: 2021, Volume and Issue: 11(10), P. 2525 - 2525

Published: Sept. 27, 2021

Carbon dots (CDs) are usually smaller than 10 nm in size, and meticulously formulated recently introduced nanomaterials, among the other types of carbon-based nanomaterials. They have gained significant attention an incredible interest field nanotechnology biomedical science, which is merely due to their considerable exclusive attributes; including enhanced electron transferability, photobleaching photo-blinking effects, high photoluminescent quantum yield, fluorescence property, resistance photo-decomposition, increased electrocatalytic activity, good aqueous solubility, excellent biocompatibility, long-term chemical stability, cost-effectiveness, negligible toxicity, acquaintance large effective surface area-to-volume ratio. CDs can be readily functionalized owing abundant functional groups on surfaces, they also exhibit remarkable sensing features such as specific, selective, multiplex detectability. In addition, physico-chemical characteristics easily tunable based intended usage or application. this comprehensive review article, we mainly discuss classification CDs, ideal properties, general synthesis approaches, primary characterization techniques. More importantly, update readers about recent trends health care applications (viz., substantial prominent role area electrochemical optical biosensing, bioimaging, drug/gene delivery, well photodynamic/photothermal therapy).

Language: Английский

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Advances in the Methods for the Synthesis of Carbon Dots and Their Emerging Applications

Polymers, Journal Year: 2021, Volume and Issue: 13(18), P. 3190 - 3190

Published: Sept. 20, 2021

Cutting-edge technologies are making inroads into new areas and this remarkable progress has been successfully influenced by the tiny level engineering of carbon dots technology, their synthesis advancement impressive applications in field allied sciences. The advances science its conjugation with interdisciplinary fields emerged making, controlled characterization faster, cheaper as well more reliable products various scientific domains. Thus, a era nanotechnology developed technology. understanding generation process, control on processes selected such energy storage, environmental monitoring, catalysis, contaminates detections complex forensics, drug delivery, targeting other biomedical applications, etc., among most promising thus it is prominent area research today. In regard, types dot nanomaterials oxides, composites conjugations, have garnering significant attention due to potential energy, environment present paper highlights role importance dots, recent advancements methods, properties emerging applications.

Language: Английский

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Investigating the effect of N-doping on carbon quantum dots structure, optical properties and metal ion screening

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: Aug. 15, 2022

Carbon quantum dots (CQDs) derived from biomass, a suggested green approach for nanomaterial synthesis, often possess poor optical properties and have low photoluminescence yield (PLQY). This study employed an environmentally friendly, cost-effective, continuous hydrothermal flow synthesis (CHFS) process to synthesise efficient nitrogen-doped carbon (N-CQDs) biomass precursors (glucose in the presence of ammonia). The concentrations ammonia, as nitrogen dopant precursor, were varied optimise CQDs. Optimised N-CQDs showed significant enhancement fluorescence emission with PLQY 9.6% compared pure glucose derived-CQDs (g-CQDs) without doping which less than 1%. With stability over pH range 2 11, excellent sensitivity nano-sensor highly toxic highly-pollutant chromium (VI), where (PL) quenching was observed. optimised nitrogen-doping demonstrated effective tuning overall electronic structure resulting enhanced performance nano-sensor.

Language: Английский

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A Review on Multifunctional Carbon-Dots Synthesized From Biomass Waste: Design/ Fabrication, Characterization and Applications

Frontiers in Energy Research, Journal Year: 2021, Volume and Issue: 9

Published: April 26, 2021

Carbon-Dots (C-Dots) have drawn much attention in recent years owing to their remarkable properties such as high biocompatibility, low toxicity, nano-scale size, and ease of modification with good tuneable photoluminescence performance. These unique led C-Dots become a promising platform for bioimaging, metal ion sensing an antibacterial agent. can be prepared using the top-down bottom-up approaches, which latter method is commonly used large scale low-cost synthesis. synthesized sustainable raw materials or green biomass since it environmentally friendly, in-expensive most importantly, promotes minimization waste production. However, produce high-quality still matter concern waiting resolution, this will main focus review. Fundamental understanding structure analysis, physical chemical C-Dots, various synthesis methodology type are also discussed correlated comprehensively. Additionally, factors affecting bandgap strategies overcome these shortcomings covered. Moreover, formation mechanism focusing on hydrothermal method, option challenges up production explored. It expected that great potential producing from agricultural key benefit view versatility wide range applications.

Language: Английский

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Carbon Dots as an Emergent Class of Antimicrobial Agents

Nanomaterials, Journal Year: 2021, Volume and Issue: 11(8), P. 1877 - 1877

Published: July 22, 2021

Antimicrobial resistance is a recognized global challenge. Tools for bacterial detection can combat antimicrobial by facilitating evidence-based antibiotic prescribing, thus avoiding their overprescription, which contributes to the spread of resistance. Unfortunately, traditional culture-based identification methods take at least day, while emerging alternatives are limited high cost and requirement skilled operators. Moreover, photodynamic inactivation bacteria promoted photosensitisers could be considered as one most promising strategies in fight against multidrug pathogens. In this context, carbon dots (CDs) have been identified class photosensitiser nanomaterials specific different species. CDs possess exceptional tuneable chemical photoelectric properties that make them excellent candidates antibacterial theranostic applications, such great stability, water solubility, low toxicity biocompatibility. review, we will summarize recent advances on use agents, including commonly used methodologies CD CD/composites syntheses both vitro vivo models developed last 3 years.

Language: Английский

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Recent Advances on Synthesis and Potential Applications of Carbon Quantum Dots

Frontiers in Materials, Journal Year: 2022, Volume and Issue: 9

Published: July 1, 2022

Fluorescent carbon nanoparticles also termed as quantum dots (CQDs) have attracted so much interest when compared to the traditional semiconductor due their applications in chemical sensing, biomedical imaging, nanotechnology, photovoltaics, light-emitting diodes (LEDs), and electrochemistry. Along with optical features, CQDs desired properties such less toxicity, environmentally friendly nature, inexpensive, simple preparation processes. In addition, can physical controlled by surface passivation functionalization. This article provides an account of because distinct characteristics considerable capacity diverse applications. The is categorized into various sections that highlight synthesis methodologies advantages/disadvantages potential sensors, bio-imaging, drug delivery, solar cells, supercapacitors. different be demonstrated methods. We discussed gas sensing briefly provided a brief overview osmotic power generation using for energy

Language: Английский

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The importance of surface states in N-doped carbon quantum dots

Carbon, Journal Year: 2021, Volume and Issue: 183, P. 1 - 11

Published: July 2, 2021

Nitrogen-doped carbon quantum dots are synthesized by a one-step atmospheric pressure microplasma process. The origin of the observed photoluminescence emission and its relationship with nitrogen doping is studied using range optical chemical measurements along verification theoretical calculations. Nitrogen into core functionalization surface states oxygen groups gives rise to hybrid structure which responsible for luminescence yields up 33%. Carrier multiplication as step-like enhancement in yield. analysis visible-light suggests that originates most part from not due recombination within dot core. role functional dominant over confinement determining properties.

Language: Английский

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Carbon Nanodots from an In Silico Perspective

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(16), P. 13709 - 13799

Published: Aug. 10, 2022

Carbon nanodots (CNDs) are the latest and most shining rising stars among photoluminescent (PL) nanomaterials. These carbon-based surface-passivated nanostructures compete with other related PL materials, including traditional semiconductor quantum dots organic dyes, a long list of benefits emerging applications. Advantages CNDs include tunable inherent optical properties high photostability, rich possibilities for surface functionalization doping, dispersibility, low toxicity, viable synthesis (top-down bottom-up) from materials. can be applied to biomedicine imaging sensing, drug-delivery, photodynamic therapy, photocatalysis but also energy harvesting in solar cells as LEDs. More applications reported continuously, making this already research field its own. Understanding requires one go levels electrons, atoms, molecules, at different scales using modern molecular modeling correlate it tightly experiments. This review highlights silico techniques studies, chemistry mesoscale, particular reference carbon nanodots, carbonaceous nanoparticles whose structural photophysical not fully elucidated. The role experimental investigation is presented. Hereby, we hope encourage reader investigate apply virtual obtain further insights needed customize these amazing systems novel prospective

Language: Английский

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