S- and N-doped carbon quantum dots: Surface chemistry dependent antibacterial activity

Travlou, Nikolina A.; Giannakoudakis, Dimitrios A.; Algarra, Manuel; Labella, Alejandro M.; Rodríguez‐Castellón, Enrique; Bandosz, Teresa J.

doi:10.1016/j.carbon.2018.04.018

Cited by 283 publications

(152 citation statements)

References 50 publications

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“…63 MIC values of CQDNH toward E. coli and B. subtilis are similar with results of other authors. 13 Since CQDNH has been shown as the most potent antibacterial agent we assumed that the presence of amino groups on the basal plane of these particles (proved by XPS and FTIR measurements) can contribute to the bacterial death as well. Amino groups are known to adsorb onto the bacterial membrane wall, which provides the molecules bearing this functional groups are diffusing into the cell interior, where the disruption of the cytoplasmic membrane nally leads to the bacterial cell destruction.…”

Section: Discussionmentioning

confidence: 99%

“…11 It has been observed earlier that the degree of antibacterial activity of graphene based materials is affected by their shape, surface functionalization, size, stability and size distribution. [12][13][14][15][16] GO is an atom thick layer of carbon atoms arranged in a honeycomb structure and bonded together by s bonds. Apart from intrinsic corrugations and topological defects (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Photo-induced antibacterial activity of four graphene based nanomaterials on a wide range of bacteria

et al. 2018

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photo-induced antibacterial activity of four graphene based nanomaterials on a wide range of bacteria

et al. 2018

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“…This is because of CD charged surface, unique structure, and photocatalytic features which can be easily modified by different functional groups [ 144 ]. For instance, amines and amides of N -doped-CDs play a vital role in improving the antibacterial effects [ 149 ]. The electrostatic interaction occurring between the CDs and pathogenic bacteria might be the main key factor behind CD antibacterial mechanism.…”

Section: Biomedical Applications Of Qdsmentioning

confidence: 99%

Superior Properties and Biomedical Applications of Microorganism-Derived Fluorescent Quantum Dots

et al. 2020

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Quantum dots (QDs) are fluorescent nanocrystals with superb photo-physical properties. Applications of QDs have been exponentially increased during the past decade. They can be employed in several disciplines, including biological, optical, biomedical, engineering, and energy applications. This review highlights the structural composition and distinctive features of QDs, such as resistance to photo-bleaching, wide range of excitations, and size-dependent light emission features. Physical and chemical preparation of QDs have prominent downsides, including high costs, regeneration of hazardous byproducts, and use of external noxious chemicals for capping and stabilization purposes. To eliminate the demerits of these methods, an emphasis on the latest progress of microbial synthesis of QDs by bacteria, yeast, and fungi is introduced. Some of the biomedical applications of QDs are overviewed as well, such as tumor and microRNA detection, drug delivery, photodynamic therapy, and microbial labeling. Challenges facing the microbial fabrication of QDs are discussed with the future prospects to fully maximize the yield of QDs by elucidating the key enzymes intermediating the nucleation and growth of QDs. Exploration of the distribution and mode of action of QDs is required to promote their biomedical applications.

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“…4 The common drug carriers used for targeted and controlled drug delivery are polymers, 5 liposomes, 6,7 nanospheres, 8 co-crystals, 9 carbon nanotubes, [10][11][12] graphene, 13,14 graphene oxide 15 and element-doped carbon nanoparticles. [16][17][18][19] Although these carriers are effective in delivering the drug at the targeted cell, most carrier-enabled drug delivery systems are biologically toxic and nonbiodegradable, causing secondary pollution. Single-walled carbon nanotubes have been reported to induce oxidative stress on keratinocyte cells 20 and cause pulmonary toxicity in mice.…”

Section: Introductionmentioning

confidence: 99%

Highly fluorescent carbon dots from wheat bran as a novel drug delivery system for bacterial inhibition

et al. 2020

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In this study, we prepared carbon dots (CDs) from wheat bran via hydrothermal treatment at 180°C for 3 h. The prepared CDs showed blue‐green fluorescence under UV light. The fluorescence emission study of the CDs revealed that they showed maximum fluorescence emission at 500 nm. The prepared CDs showed a high quantum yield of 33.23%. Solvent‐dependent fluorescence emission analysis of the CDs was performed to study the variation in fluorescence emission characteristics with solvent polarity. The prepared CDs were conjugated with amoxicillin (AMX) to explore its potential for use as a drug delivery agent for AMX. The drug release profile of the CD–AMX conjugates was analyzed at different pH (5.0, 6.8 and 7.2) to study drug release kinetics. CD–AMX conjugates showed notable bacterial inhibition against Gram‐positive (S. aureus) and Gram‐negative (E. coli) strains with minimal cytotoxic effects, indicating its potential as a promising antibacterial drug delivery system.

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S- and N-doped carbon quantum dots: Surface chemistry dependent antibacterial activity

Cited by 283 publications

References 50 publications

Photo-induced antibacterial activity of four graphene based nanomaterials on a wide range of bacteria

Photo-induced antibacterial activity of four graphene based nanomaterials on a wide range of bacteria

Superior Properties and Biomedical Applications of Microorganism-Derived Fluorescent Quantum Dots

Highly fluorescent carbon dots from wheat bran as a novel drug delivery system for bacterial inhibition

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