Synthesis and bacterial inhibition of novel Ag2S–N–CQD composite material

Wang, Kunjie; Liu, Liang; Xu, Jialin; Li, Hongxia; Du, Mei; Zhao, Xiaoliang; Zhang, Deyi; Li, Congcong; Fan, Haiyan

doi:10.1007/s11696-019-01006-2

Cited by 7 publications

(3 citation statements)

References 38 publications

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“…Interestingly, in the present study, the CQDs show more inhibition toward Bacillus cereus, Staphylococcus aureus, Pseudomonas aeruginosa, Vibrio cholera, and Escherichia coli, and their antibacterial activity is compared with those of other CQDs (Table ). − Therefore, the synthesized CQDs can be used for pharmaceutical applications.…”

Section: Resultsmentioning

confidence: 99%

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

et al. 2020

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In this work, the green synthesis of highly fluorescent carbon quantum dots (CQDs) with an efficient quantum yield of 17.98% using sugarcane bagasse pulp as the precursor was conducted by a hydrothermal technique. The high-resolution transmission electron microscopy analysis revealed that the CQDs were competently monodispersed with the particle size ranging between 0.75 and 2.75 nm. The structural properties of CQDs were investigated using X-ray diffraction, Fourier transform infrared, and X-ray photoelectron spectroscopy analyses. The UV–visible spectrum showed two absorption peaks due to the aromatic CC transitions of π–π* and CO transitions of n−π*. The fluorescence spectrum of CQDs displayed a strong blue emission. However, the first-ever of its kind, sugarcane industrial solid waste carbon quantum dots caused significant orders to obey the enhancement of the third-order nonlinearity (χ(3)) when compared with other carbon dots (CDs). The calculated nonlinear optical (NLO) parameters such as n 2, β, and χ(3) were 1.012 × 10–8 cm2/W, 2.513 × 10–4, and 3.939 × 10–7 esu, respectively. The figures of merit were evaluated to be W = 6.6661 and T = 0.0132, which greatly fulfilled the optical switching conditions. Besides, the antibacterial activities of CQDs were screened against aquatic Gram-positive (Benthesicymus cereus and Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa, Vibrio cholerae, and Escherichia coli) microbial organisms. Our findings, however, indicate that synergistic sugarcane industrial waste CQDs are promising materials for the functioning of NLO devices, bioimaging, and pharmaceutical applications.

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Section: Resultsmentioning

confidence: 99%

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

et al. 2020

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“…Therefore, the GQD complex has the potential to achieve low-dose high-precision radiotherapy treatment for osteosarcoma. In recent years, GQDs have been used in many applications in the biomedical field, such as biomedical imaging [442][443][444][445][446], immune probes [447], fluorescence probes [448][449][450][451][452][453][454][455][456], drug carriers [457,458], sterilization [459][460][461][462], wound healing [463][464][465] and cancer treatment and diagnosis [421,425,433,441]. The effectiveness of nanodrugs to different age groups has also been studied [466].…”

Section: Therapy For Other Diseasesmentioning

confidence: 99%

Graphene quantum dots: preparations, properties, functionalizations and applications

Tian,

Tang,

Teng

et al. 2024

Mater. Futures

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Due to its zero-dimensional property, graphene quantum dots (GQDs) has quantum confinement effect on the internal charge, so they show many properties different from the parent two-dimensional graphene, such as strong fluorescence, non-zero band gap and easily soluble in solvents. As a member of the family of carbon materials, GQDs also has biocompatibility and low toxicity, which is one of the reasons why GQDs can be widely used in the biomedical field .The edge effect of GQDs is also particularly important. By modifying the edge of GQDs, the performance of GQDs can be regulated. A lot of preparation technology of GQDs, probably can be divided into three categories, and top-down, bottom-up and chemical method, chemical method is different from other literature classification, mainly considering the certain of the preparation of GQDs way, not directly to block materials or direct synthesis of small molecule materials for GQDs, but through intermediate in chemical means under the action of changes and form GQDs. The detailed introduction of the optical, electrical, thermal and magnetic properties of GQDs is the premise of the performance regulation of GQDs. In addition to inheriting the excellent properties of graphene, GQDs also expand the properties of the parent material. The functionalization of GQDs mainly includes the doping technology of introducing heteroatom and the composite technology of combining with other substances to improve the performance of other substances. The performance of these functionalized products is also discussed. The original and functionalized properties of GQDs are based on the application of GQDs. In recent years, GQDs has been used in many fields, including optics, electricity, optoelectronics, biomedicine, energy, agriculture and some emerging interdisciplinary fields. Through the introduction and discussion of the recent research achievements of GQDs, this review mainly highlights the huge potential value of GQDs and puts forward the direction of the development of GQDs in the future.

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“…Nitrogen (as well as different heteroatoms such as P, O, and S) has also been incorporated during the CD synthesis using a mixture of different starting materials [ 61 ]. For example, the addition of polyamines [ 16 , 62 ], amino acids [ 63 , 64 , 65 , 66 , 67 ], or biomass such as plant leaves and fungi [ 68 , 69 , 70 , 71 , 72 , 73 , 74 ], food [ 75 , 76 , 77 , 78 , 79 ], and industrial [ 80 ] and waste derivatives [ 81 , 82 ], among others, have been used for the preparation of doped CDs. In this context, two independent comparative studies from the Kang [ 83 ] and Bandosz [ 84 ] research groups highlighted that N- or S-doped CDs exhibit very different antibacterial properties.…”

Section: Cds As Bacteria Targeting and Antibacterial Agentsmentioning

confidence: 99%

Carbon Dots as an Emergent Class of Antimicrobial Agents

2021

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

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Synthesis and bacterial inhibition of novel Ag2S–N–CQD composite material

Cited by 7 publications

References 38 publications

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

Graphene quantum dots: preparations, properties, functionalizations and applications

Carbon Dots as an Emergent Class of Antimicrobial Agents

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